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In my app I am trying to make an custom UIPickerView which contains three components(days, hours and minutes). I have already made the custom picker with three components. And Now I am stuck at how I can add the labels to the selection indicator which shows which component is for days, hours or minutes.
I have already gone through each and every link or question posted on this site but none them helped me.
I am trying to implement something like this image
Can any one suggest me how can I achieve this?
Thats how I achieve this....I have made my Custom PickerView with the help of some code I found...
In .h file:
// LabeledPickerView.h
// LabeledPickerView
#import <UIKit/UIKit.h>
#interface LabeledPickerView : UIPickerView
{
NSMutableDictionary *labels;
}
/** Adds the label for the given component. */
-(void)addLabel:(NSString *)labeltext forComponent:(NSUInteger)component forLongestString:(NSString *)longestString;
#end
and In the .m file...
// LabeledPickerView.m
// LabeledPickerView
#import "LabeledPickerView.h"
#implementation LabeledPickerView
/** loading programmatically */
- (id)initWithFrame:(CGRect)aRect {
if (self = [super initWithFrame:aRect]) {
labels = [[NSMutableDictionary alloc] initWithCapacity:3];
}
return self;
}
/** loading from nib */
- (id)initWithCoder:(NSCoder *)coder {
if (self = [super initWithCoder:coder]) {
labels = [[NSMutableDictionary alloc] initWithCapacity:3];
}
return self;
}
- (void) dealloc
{
[labels release];
[super dealloc];
}
#pragma mark Labels
// Add labelText to our array but also add what will be the longest label we will use in updateLabel
// If you do not plan to update label then the longestString should be the same as the labelText
// This way we can initially size our label to the longest width and we get the same effect Apple uses
-(void)addLabel:(NSString *)labeltext forComponent:(NSUInteger)component forLongestString:(NSString *)longestString {
[labels setObject:labeltext forKey:[NSNumber numberWithInt:component]];
NSString *keyName = [NSString stringWithFormat:#"%#_%#", #"longestString", [NSNumber numberWithInt:component]];
if(!longestString) {
longestString = labeltext;
}
[labels setObject:longestString forKey:keyName];
}
//
- (void) updateLabel:(NSString *)labeltext forComponent:(NSUInteger)component {
UILabel *theLabel = (UILabel*)[self viewWithTag:component + 1];
// Update label if it doesn’t match current label
if (![theLabel.text isEqualToString:labeltext]) {
NSString *keyName = [NSString stringWithFormat:#"%#_%#", #"longestString", [NSNumber numberWithInt:component]];
NSString *longestString = [labels objectForKey:keyName];
// Update label array with our new string value
[self addLabel:labeltext forComponent:component forLongestString:longestString];
// change label during fade out/in
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.75];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
theLabel.alpha = 0.00;
theLabel.text = labeltext;
theLabel.alpha = 1.00;
[UIView commitAnimations];
}
}
/**
Adds the labels to the view, below the selection indicator glass-thingy.
The labels are aligned to the right side of the wheel.
The delegate is responsible for providing enough width for both the value and the label.
*/
- (void)didMoveToWindow {
// exit if view is removed from the window or there are no labels.
if (!self.window || [labels count] == 0)
return;
UIFont *labelfont = [UIFont boldSystemFontOfSize:15];
// find the width of all the wheels combined
CGFloat widthofwheels = 0;
for (int i=0; i<self.numberOfComponents; i++) {
widthofwheels += [self rowSizeForComponent:i].width;
}
// find the left side of the first wheel.
// seems like a misnomer, but that will soon be corrected.
CGFloat rightsideofwheel = (self.frame.size.width - widthofwheels) / 2;
// cycle through all wheels
for (int component=0; component<self.numberOfComponents; component++) {
// find the right side of the wheel
rightsideofwheel += [self rowSizeForComponent:component].width;
// get the text for the label.
// move on to the next if there is no label for this wheel.
NSString *text = [labels objectForKey:[NSNumber numberWithInt:component]];
if (text) {
// set up the frame for the label using our longestString length
NSString *keyName = [NSString stringWithFormat:#"%#_%#", [NSString stringWithString:#"longestString"], [NSNumber numberWithInt:component]];
NSString *longestString = [labels objectForKey:keyName];
CGRect frame;
frame.size = [longestString sizeWithFont:labelfont];
// center it vertically
frame.origin.y = (self.frame.size.height / 2) - (frame.size.height / 2) - 0.5;
// align it to the right side of the wheel, with a margin.
// use a smaller margin for the rightmost wheel.
frame.origin.x = rightsideofwheel - frame.size.width -
(component == self.numberOfComponents - 1 ? 5 : 7);
// set up the label. If label already exists, just get a reference to it
BOOL addlabelView = NO;
UILabel *label = (UILabel*)[self viewWithTag:component + 1];
if(!label) {
label = [[[UILabel alloc] initWithFrame:frame] autorelease];
addlabelView = YES;
}
label.text = text;
label.font = labelfont;
label.backgroundColor = [UIColor clearColor];
label.shadowColor = [UIColor whiteColor];
label.shadowOffset = CGSizeMake(0,1);
// Tag cannot be 0 so just increment component number to esnure we get a positive
// NB update/remove Label methods are aware of this incrementation!
label.tag = component + 1;
if(addlabelView) {
/*
and now for the tricky bit: adding the label to the view.
kind of a hack to be honest, might stop working if Apple decides to
change the inner workings of the UIPickerView.
*/
if (self.showsSelectionIndicator) {
// if this is the last wheel, add label as the third view from the top
if (component==self.numberOfComponents-1)
[self insertSubview:label atIndex:[self.subviews count]-3];
// otherwise add label as the 5th, 10th, 15th etc view from the top
else
[self insertSubview:label aboveSubview:[self.subviews objectAtIndex:5*(component+1)]];
} else
// there is no selection indicator, so just add it to the top
[self addSubview:label];
}
if ([self.delegate respondsToSelector:#selector(pickerView:didSelectRow:inComponent:)])
[self.delegate pickerView:self didSelectRow:[self selectedRowInComponent:component] inComponent:component];
}
}
}
And call this addLabel: method with the label text and component tag and thats it..!!
Download the Source code Of custom UIPickerView Control .
Custom UiPickerView.
Hope it Helps to You :)
I am asking this question regarding my questions Display photolibrary images in an effectual way iPhone and Highly efficient UITableView "cellForRowIndexPath" method to bind the PhotoLibrary images.
So I would like to request that answers are not duplicated to this one without reading the below details :)
Let's come to the issue,
I have researched detailed about my above mentioned issue, and I have found the document about operation queues from here.
So I have created one sample application to display seven photo-library images using operation queues through ALAsset blocks.
Here are the sample application details.
Step 1:
In the NSOperationalQueueViewController viewDidLoad method, I have retrieved all the photo-gallery ALAsset URLs in to an array named urlArray.
Step 2:
After all the URLs are added to the urlArray, the if(group != nil) condition will be false in assetGroupEnumerator, so I have created a NSOperationQueue, and then created seven UIImageView's through a for loop and created my NSOperation subclass object with the corresponding image-view and URL for each one and added them in to the NSOperationQueue.
See my NSOperation subclass here.
See my implementation (VierwController) class here.
Let's come to the issue.
It not displaying all the seven images consistently. Some of the images are missing. The missing order is changing multiple times (one time it doesn't display the sixth and seventh, and another time it doesn't display only the second and third). The console log displays Could not find photo pic number. However, the URLs are logged properly.
You can see the log details here.
Are there any mistakes in my classes?
Also, when I go through the above mentioned operational queue documentation, I have read about NSBlockOperation. Do I need to implement NSBlockOperation instead of NSOperation while dealing with ALAsset blocks?
The NSBlockOperation description says
A class you use as-is to execute one or more block objects
concurrently. Because it can execute more than one block, a block
operation object operates using a group semantic; only when all of the
associated blocks have finished executing is the operation itself
considered finished.
How can I implement the NSBlockOperation with ALAsset block regarding my sample application?
I have gone through Stack Overflow question Learning NSBlockOperation. However, I didn't get any idea to implement the NSBlockOperation with ALAsset block!!
This is the tutorial about "How to access all images from iPhonePhoto Library using ALAsset Library and show them on UIScrollView like iPhoneSimulator" .
First of all add AssetsLibrary.framework to your project.
Then in your viewController.h file import #import <AssetsLibrary/AssetsLibrary.h> header file.
This is your viewController.h file
#import <UIKit/UIKit.h>
#import <AssetsLibrary/AssetsLibrary.h>
#import "AppDelegate.h"
#interface ViewController : UIViewController <UIScrollViewDelegate>
{
ALAssetsLibrary *assetsLibrary;
NSMutableArray *groups;
ALAssetsGroup *assetsGroup;
// I will show all images on `UIScrollView`
UIScrollView *myScrollView;
UIActivityIndicatorView *activityIndicator;
NSMutableArray *assetsArray;
// Will handle thumbnail of images
NSMutableArray *imageThumbnailArray;
// Will handle original images
NSMutableArray *imageOriginalArray;
UIButton *buttonImage;
}
-(void)displayImages;
-(void)loadScrollView;
#end
And this is your viewController.m file -
viewWillAppear:
#import "ViewController.h"
#import <QuartzCore/QuartzCore.h>
#implementation ViewController
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
assetsArray = [[NSMutableArray alloc]init];
imageThumbnailArray = [[NSMutableArray alloc]init];
imageOriginalArray = [[NSMutableArray alloc]init];
myScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0.0, 0.0, 320.0, 416.0)];
myScrollView.delegate = self;
myScrollView.contentSize = CGSizeMake(320.0, 416.0);
myScrollView.backgroundColor = [UIColor whiteColor];
activityIndicator = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
activityIndicator.center = myScrollView.center;
[myScrollView addSubview:activityIndicator];
[self.view addSubview:myScrollView];
[activityIndicator startAnimating];
}
viewDidAppear:
-(void)viewDidAppear:(BOOL)animated
{
if (!assetsLibrary) {
assetsLibrary = [[ALAssetsLibrary alloc] init];
}
if (!groups) {
groups = [[NSMutableArray alloc] init];
}
else {
[groups removeAllObjects];
}
ALAssetsLibraryGroupsEnumerationResultsBlock listGroupBlock = ^(ALAssetsGroup *group, BOOL *stop) {
//NSLog(#"group %#",group);
if (group) {
[groups addObject:group];
//NSLog(#"groups %#",groups);
} else {
//Call display Images method here.
[self displayImages];
}
};
ALAssetsLibraryAccessFailureBlock failureBlock = ^(NSError *error) {
NSString *errorMessage = nil;
switch ([error code]) {
case ALAssetsLibraryAccessUserDeniedError:
case ALAssetsLibraryAccessGloballyDeniedError:
errorMessage = #"The user has declined access to it.";
break;
default:
errorMessage = #"Reason unknown.";
break;
}
};
[assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:listGroupBlock failureBlock:failureBlock];
}
And this is displayImages: method body
-(void)displayImages
{
// NSLog(#"groups %d",[groups count]);
for (int i = 0 ; i< [groups count]; i++) {
assetsGroup = [groups objectAtIndex:i];
if (!assetsArray) {
assetsArray = [[NSMutableArray alloc] init];
}
else {
[assetsArray removeAllObjects];
}
ALAssetsGroupEnumerationResultsBlock assetsEnumerationBlock = ^(ALAsset *result, NSUInteger index, BOOL *stop) {
if (result) {
[assetsArray addObject:result];
}
};
ALAssetsFilter *onlyPhotosFilter = [ALAssetsFilter allPhotos];
[assetsGroup setAssetsFilter:onlyPhotosFilter];
[assetsGroup enumerateAssetsUsingBlock:assetsEnumerationBlock];
}
//Seprate the thumbnail and original images
for(int i=0;i<[assetsArray count]; i++)
{
ALAsset *asset = [assetsArray objectAtIndex:i];
CGImageRef thumbnailImageRef = [asset thumbnail];
UIImage *thumbnail = [UIImage imageWithCGImage:thumbnailImageRef];
[imageThumbnailArray addObject:thumbnail];
ALAssetRepresentation *representation = [asset defaultRepresentation];
CGImageRef originalImage = [representation fullResolutionImage];
UIImage *original = [UIImage imageWithCGImage:originalImage];
[imageOriginalArray addObject:original];
}
[self loadScrollView];
}
Now you have two array one is imageThumbnailArray and another is imageOriginalArray.
Use imageThumbnailArray for showing on UIScrollView for which your scrolling will not be slow.... And use imageOriginalArray for an enlarged preview of image.
'loadScrollView:' method, This is how to images on UIScrollView like iPhoneSimulator
#pragma mark - LoadImages on UIScrollView
-(void)loadScrollView
{
float horizontal = 8.0;
float vertical = 8.0;
for(int i=0; i<[imageThumbnailArray count]; i++)
{
if((i%4) == 0 && i!=0)
{
horizontal = 8.0;
vertical = vertical + 70.0 + 8.0;
}
buttonImage = [UIButton buttonWithType:UIButtonTypeCustom];
[buttonImage setFrame:CGRectMake(horizontal, vertical, 70.0, 70.0)];
[buttonImage setTag:i];
[ buttonImage setImage:[imageThumbnailArray objectAtIndex:i] forState:UIControlStateNormal];
[buttonImage addTarget:self action:#selector(buttonImagePressed:) forControlEvents:UIControlEventTouchUpInside];
[myScrollView addSubview:buttonImage];
horizontal = horizontal + 70.0 + 8.0;
}
[myScrollView setContentSize:CGSizeMake(320.0, vertical + 78.0)];
[activityIndicator stopAnimating];
[activityIndicator removeFromSuperview];
}
And here you can find which image button has been clicked -
#pragma mark - Button Pressed method
-(void)buttonImagePressed:(id)sender
{
NSLog(#"you have pressed : %d button",[sender tag]);
}
Hope this tutorial will help you and many users who search for the same.. Thank you!
You have a line in your DisplayImages NSOperation subclass where you update the UI (DisplayImages.m line 54):
self.imageView.image = topicImage;
This operation queue is running on a background thread, and we know that you should only update the state of the UI on the main thread. Since updating the view of an image view is definitely updating the UI, this can be simply fixed by wrapping the call with:
dispatch_async(dispatch_get_main_queue(), ^{
self.imageView.image = topicImage;
});
This puts an asynchronous call on the main queue to update the UIImageView with the image. It's asynchronous so your other tasks can be scheduled in the background, and it's safe as it is running on the main queue - which is the main thread.
i have UILabel (cocoa touch framework) and i want to right and left justify its text.
as a consequence it will stretch the text inside.
Example:
like if i had this text "While the saved costs of physical manufacturing and shipping" it would appear like the following:
"While the saved"
"c o s t s o f"
"p h y s i c a l"
"manufacturing"
"a n d shipping"
as you can see left and right justification...
how can i achieve that ???
many thanks
i'm sorry i had to put the double qoutations to post the question.
You should use my OHAttributedLabel class.
It has everything needed to display an NSAttributedString, including justifying left, center, right… and justified, and is really simple to use.
You can find it here on github. See the sample code provided that also shows how to change text justification.
// suppose that label is an IBOutlet to an OHAttributedLabel (subclass oh UILabel)
label.textAlignment = UITextAlignmentJustify; // and that's all, OHAttributedLabel does everything needed for you!
(Note: UITextAlignmentJustify is a constant defined in OHAttributedLabel headers that matches corresponding CoreText constant for justify alignment. This constant does not exists in Apple's SDK)
[EDIT] iOS6 SDK
Since iOS6 SDK, the UITextAlignmentJustify does not work anymore and generate a crash at runtime. Now you should set the text alignment of your NSAttributedString itself instead of using the textAlignment property of the label.
Using UIWebView can be slow, so if that's an issue CoreText is the way to go.
Here's some code that uses core text to display an attributed string on a view. It indents a bit like UILabel. I've left some other paragraph formatting options in to illustrate how you can set other paragraph properties and also set the attributed string to bold. Remember you'll need to add the CoreText framework otherwise you'll get build errors.
This code doesn't full justify the last line. Not sure you can get this for free in CoreText.
the .h file
//
// SmartLabel.h
//
#import <UIKit/UIKit.h>
#import <CoreText/CoreText.h> // needed for CTFontRef, CTFontCreateWithName
#interface SmartLabel : UIView
{
NSMutableAttributedString* _pgSmartString;
}
#property (nonatomic, retain) NSMutableAttributedString* smartString;
- (void) setText: (NSString*) string;
- (void) formatString;
#end
And the .m file
//
// SmartLabel.m
//
#import "SmartLabel.h"
#implementation SmartLabel
#synthesize smartString = _pgSmartString;
- (void)dealloc
{
[_pgSmartString release];
[super dealloc];
}
- (id)initWithFrame:(CGRect)frame;
{
if ((self = [super initWithFrame:frame]))
{
[self setBackgroundColor: [UIColor clearColor]];
}
return self;
}
- (void)drawRect:(CGRect)rect
{
CGContextRef graphicsContext = UIGraphicsGetCurrentContext();
CGContextSetTextMatrix(graphicsContext, CGAffineTransformIdentity);
// turns things right way up
CGContextTranslateCTM(graphicsContext, 0, self.bounds.size.height);
CGContextScaleCTM(graphicsContext, 1.0, -1.0);
CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)[self smartString]);
CGRect bounds = [self bounds];
bounds.origin.x = bounds.origin.x + 8;
bounds.size.width = bounds.size.width - 16;
CGMutablePathRef path = CGPathCreateMutable();
CGPathAddRect(path, NULL, bounds);
CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, [[self smartString] length]), path, NULL);
CFRelease(path);
CTFrameDraw(frame, graphicsContext);
CFRelease(frame);
CFRelease(framesetter);
}
- (void) setText: (NSString*) string;
{
NSMutableAttributedString* attributedString = [[NSMutableAttributedString alloc] initWithString:string];
[self setSmartString:attributedString];
[attributedString release];
[self formatString];
}
- (void) formatString;
{
CTTextAlignment alignment = kCTJustifiedTextAlignment; // could put different alignments here
CGFloat paragraphSpacing = 11.0;
CGFloat paragraphSpacingBefore = 0.0;
CGFloat firstLineHeadIndent = 0.0;
CGFloat headIndent = 0.0;
CTParagraphStyleSetting altSettings[] =
{
{ kCTParagraphStyleSpecifierAlignment, sizeof(CTTextAlignment), &alignment},
{ kCTParagraphStyleSpecifierFirstLineHeadIndent, sizeof(CGFloat), &firstLineHeadIndent},
{ kCTParagraphStyleSpecifierHeadIndent, sizeof(CGFloat), &headIndent},
{ kCTParagraphStyleSpecifierParagraphSpacing, sizeof(CGFloat), ¶graphSpacing},
{ kCTParagraphStyleSpecifierParagraphSpacingBefore, sizeof(CGFloat), ¶graphSpacingBefore},
};
CTParagraphStyleRef style;
style = CTParagraphStyleCreate( altSettings, sizeof(altSettings) / sizeof(CTParagraphStyleSetting) );
if ( style == NULL )
{
NSLog(#"*** WARNING *** Unable To Create CTParagraphStyle in apply paragraph formatting" );
return;
}
[[self smartString] addAttributes:[NSDictionary dictionaryWithObjectsAndKeys:(NSObject*)style,(NSString*) kCTParagraphStyleAttributeName, nil] range:NSMakeRange(0,[[self smartString] length])];
CFRelease(style);
UIFont* boldFont = [UIFont boldSystemFontOfSize:12.0];
CTFontRef boldCoreTextFontReference = CTFontCreateWithName ((CFStringRef)[boldFont fontName],[boldFont pointSize], NULL);
[[self smartString] addAttributes:[NSDictionary dictionaryWithObjectsAndKeys:(NSObject*)boldCoreTextFontReference,(NSString*) kCTFontAttributeName, nil] range:NSMakeRange(0,[[self smartString] length])];
}
#end
And to put to use, something like this:
SmartLabel* smartLabel = [[SmartLabel alloc] initWithFrame:CGRectMake(20, 120, 90, 140.0)];
[[self window] addSubview:smartLabel];
[smartLabel setText:#"While the saved costs of physical manufacturing and shipping"];
[smartLabel release];
Its very easy after the release of IOS 6.
Use this
//build a style for justification
NSMutableParagraphStyle *stringStyle=[[NSMutableParagraphStyle alloc]init];
[stringStyle setAlignment:NSTextAlignmentJustified];
//build a string with the particular paragraph style
NSMutableAttributedString* yourString=[[NSMutableAttributedString alloc]init];
[yourString addAttribute:NSParagraphStyleAttributeName value:stringStyle range:NSMakeRange(0, [yourString length])];
//and here you go
UILabel *yourLabel;
yourlabel.attributedText=yourString;
From iOS 6 you can use NSMutableAttributedString for this,
NSMutableAttributedString* attrStr = [[NSMutableAttributedString alloc] initWithData:[#"Your String value" dataUsingEncoding:NSUTF8StringEncoding] options:#{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType, NSCharacterEncodingDocumentAttribute: [NSNumber numberWithInt:NSUTF8StringEncoding]} documentAttributes:nil error:nil];
NSRange rangeOfTitle = NSMakeRange(0,[attrStr length]);
[attrStr addAttribute: NSFontAttributeName value:[UIFont fontWithName:#"Calibri" size:19.0]range:rangeOfTitle];
myLabel.attributedText = attrStr;
NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
[style setLineSpacing:10];
style.lineBreakMode = NSLineBreakByWordWrapping;
style.alignment = NSTextAlignmentJustified;
[attrStr addAttribute:NSParagraphStyleAttributeName value:style range:NSMakeRange(0, myLabel.text.length)];
myLabel.attributedText = attrStr;
The perfect solution is to used NSMutableParagraphStyle
NSMutableParagraphStyle *paragraphStyles = [[NSMutableParagraphStyle alloc] init];
paragraphStyles.alignment = NSTextAlignmentJustified; //justified text
paragraphStyles.firstLineHeadIndent = 1.0;
NSDictionary *attributes = #{NSParagraphStyleAttributeName: paragraphStyles};
NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString: YourString attributes: attributes];
YourLabel.attributedText = attributedString;
This is so called "full justification", but isn't supported by the UILabel system (which only has "alignments" - left, right and centre). If you want this, you'll have to code it up yourself, building a control with CoreText or similar.
Agree that this can only be done with a good bit of custom coding; which I would think will be some pretty heavy stuff. Before you get into that; and this is depending on your requirement; do consider having a UIWebView where I imagine you would be able to manage text styles and alignments with a bit more freedom using some HTML and CSS coding.
The following works as a quick fix, but note that for anything more than black plain text you'll need some styling or css.
(From: Justified Alignment in UITextView - iPhone)
I have come to a solution that works. First of all, you will need to change your UITextView and use a UIWebView instead.
Details.h
#interface Details : UIViewController {
IBOutlet UIWebView *descripcion;
}
#property (nonatomic, retain) UITextView *descripcion;
Then, load your UIWebView as follows:
Details.m
[descripcion loadHTMLString:[NSString stringWithFormat:#"<div align='justify'>%#<div>",YOUR_TEXT] baseURL:nil];
I'm using Three20 TTStyledTextLabel and when I change the default font (Helvetica) to something else it creates some kind of height difference between links and regular text
The following code demonstrate my problem:
#import <Three20/Three20.h>
#interface TestController : UIViewController {
}
#end
#implementation TestController
-(id)init{
self = [super init];
TTStyledTextLabel* label = [[[TTStyledTextLabel alloc] initWithFrame:CGRectMake(0, 0, 320, 230)] autorelease];
label.text = [TTStyledText textFromXHTML:#"link text" lineBreaks:YES URLs:YES];
[label setFont:[UIFont systemFontOfSize:16]];
[[self view] addSubview:label];
TTStyledTextLabel* label2 = [[[TTStyledTextLabel alloc] initWithFrame:CGRectMake(0, 230, 320, 230)] autorelease];
label2.text = [TTStyledText textFromXHTML:#"link2 text2" lineBreaks:YES URLs:YES];
[label2 setFont:[UIFont fontWithName:#"HelveticaNeue" size:16]];
[[self view] addSubview:label2];
return self;
}
#end
In the screen shot you can see that the first link is aligned and the second one isn't
How do I fix it? I think there is a bug in the TTStyledTextLabel code...
i just commented - (void)offsetFrame:(TTStyledFrame*)frame by:(CGFloat)y (TTStyledLayout.m:87) out and it did the trick. of course it may break other stuff.
edit:
i also commented out the following bits of code
if (!font) {
// if ([elt isKindOfClass:[TTStyledLinkNode class]]
// || [elt isKindOfClass:[TTStyledBoldNode class]]) {
// font = self.boldFont;
// } else if ([elt isKindOfClass:[TTStyledItalicNode class]]) {
// font = self.italicFont;
// } else {
font = self.font;
// }
}
to get rid of the bold font.
In the latest version of three20 as of this writing, it seems to me that the problem lives at TTStyledLayout:345.
Specifically, changing:
[self offsetFrame:frame by:(_lineHeight - (frame.height - font.descender))];
to
[self offsetFrame:frame by:(_lineHeight - (frame.height /* - font.descender */ ))];
... seems to solve the problem.
After staring at the TT code for awhile, I believe your problem only crops up when there are URLs on a line because URL boldness inflates some "line height" ivar. If you don't want to fork three20, you could probably just alter your stylesheet to ensure the line heights of URLs are no different than the line height of the rest of your text. I'm just speculating, though.
I plan on filing a bug report about this, too.
If you look at the source code, the font is set using a style: self.font = TTSTYLEVAR(font). I would do two things here
Create a Category that overrides the initWithFrame method. Leave everything the same except rename self.font = TTSTYLEVAR(font) to something else like tableXFont so that changing the font style will not affect your whole app.
Make and register your own stylesheet so that the tableXFont is defined.
This should set you on the right path to the proper way to do three20 font and styling customization
This is better, so it won't change the style of TTStyledBoldNodeclass
Original Code:
if (!font) {
if ([elt isKindOfClass:[TTStyledLinkNodeclass]]
|| [elt isKindOfClass:[TTStyledBoldNodeclass]]) {
font = self.boldFont;
} elseif ([elt isKindOfClass:[TTStyledItalicNodeclass]]) {
font = self.italicFont;
} else {
font = self.font;
}
}
Fixed Code:
if (!font) {
if ([elt isKindOfClass:[TTStyledBoldNodeclass]]) {
font = self.boldFont;
} elseif ([elt isKindOfClass:[TTStyledItalicNodeclass]]) {
font = self.italicFont;
} else {
font = self.font;
}
}
Is there any way to customize color of selected segment in UISegmentedControl?
I've found segmentedController.tintColor property, which lets me customize color of the whole segmented control.
The problem is, when I select bright color for tintColor property, selected segment becomes almost unrecognizable (its color is almost the same as the rest of segmented control, so its hard to distinguish selected and unselected segments). So I cannot use any good bright colors for segmented control.
The solution would be some separate property for selected segment color but I cannot find it. Did anyone solve this?
Here is the absolute simplest way to change the selected segment to any RGB color. No subclassing or hacks required.
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
UIColor *newTintColor = [UIColor colorWithRed: 251/255.0 green:175/255.0 blue:93/255.0 alpha:1.0];
segmentedControl.tintColor = newTintColor;
UIColor *newSelectedTintColor = [UIColor colorWithRed: 0/255.0 green:175/255.0 blue:0/255.0 alpha:1.0];
[[[segmentedControl subviews] objectAtIndex:0] setTintColor:newSelectedTintColor];
This example shows the important steps:
Sets the control style to
"StyleBar", which is required for it
to work
Sets the un-selected color for the
entire control first to orange
Sets the color of the selected
segment to green
Notes:
Steps 1 and 2 can be done in
interface builder, or in code as
shown. However step 3 can only be done
in code
The color values being set with
notation like this "123.0/255.0" is
just a way to make the RGB values
stand out instead the normalized
float values required by UIColor
(just ignore it if you like)
I found A Simple Way to Add Color for Selected Segment in UISegmentcontrol
sender is UISegmentControl
for (int i=0; i<[sender.subviews count]; i++)
{
if ([[sender.subviews objectAtIndex:i]isSelected] )
{
UIColor *tintcolor=[UIColor colorWithRed:127.0/255.0 green:161.0/255.0 blue:183.0/255.0 alpha:1.0];
[[sender.subviews objectAtIndex:i] setTintColor:tintcolor];
}
else
{
[[sender.subviews objectAtIndex:i] setTintColor:nil];
}
}
Check its Working For Me
To do this you simply have to find the selected segment, for example by iterating over the segmented control's subviews and testing the isSelected property, then simply call the setTintColor: method on that subview.
I did this by connecting an action to each segmented control on the ValueChanged event in Interface Builder, I connected them to this this method in the view controller file which is essentially msprague's answer:
- (IBAction)segmentedControlValueChanged:(UISegmentedControl*)sender
{
for (int i=0; i<[sender.subviews count]; i++)
{
if ([[sender.subviews objectAtIndex:i] respondsToSelector:#selector(isSelected)] && [[sender.subviews objectAtIndex:i]isSelected])
{
[[sender.subviews objectAtIndex:i] setTintColor:[UIColor whiteColor]];
}
if ([[sender.subviews objectAtIndex:i] respondsToSelector:#selector(isSelected)] && ![[sender.subviews objectAtIndex:i] isSelected])
{
[[sender.subviews objectAtIndex:i] setTintColor:[UIColor blackColor]];
}
}
}
To ensure that the control is displayed correctly each time the view is opened by the user I also had to override the -(void)viewDidAppear:animated method and call the method as follows:
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
//Ensure the segmented controls are properly highlighted
[self segmentedControlValueChanged:segmentedControlOne];
[self segmentedControlValueChanged:segmentedControlTwo];
}
For some bonus points if you do want to set the segmented control to use a white tint color on selection then you will also want to change the color of the text to black when it's selected, you can do this like so:
//Create a dictionary to hold the new text attributes
NSMutableDictionary * textAttributes = [[NSMutableDictionary alloc] init];
//Add an entry to set the text to black
[textAttributes setObject:[UIColor blackColor] forKey:UITextAttributeTextColor];
//Set the attributes on the desired control but only for the selected state
[segmentedControlOne setTitleTextAttributes:textAttributes forState:UIControlStateSelected];
With the introduction of iOS 6 setting the tint color of the selected item for the first time in the viewDidAppear method wont work, to get around this I used grand central dispatch to change the selected color after a fraction of a second like so:
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 0.05 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
[self segmentedControlValueChanged:segmentedControlOne];
});
For some reason Apple dont allow you to change the color of standard UISegmentedControls.
There is however a "legal" way around it which is to change the segmented control style to UISegmentedControlStyleBar. This makes it look slightly different which you may not like but it does allow color.
NSArray *itemArray = [NSArray arrayWithObjects: #"One", #"Two", #"Three", nil];
UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:itemArray];
//Change Bar Style and ad to view then release segmented controller
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
segmentedControl.tintColor = [UIColor colorWithRed:.9 green:.1 blue:.1 alpha:1];
[self.view addSubview:segmentedControl];
[segmentedControl release];
Hope this helped,
Seb Kade
"I'm here to help"
Edit: This solution doesn't work on iOS 6. See David Thompson's answer below.
This thread is really old, but none of the simple answers worked properly for me.
The accepted answer works as long as you revert the color of the deselected segmented controls.
Something like this will work in your value changed function:
for (int i=0; i<[control.subviews count]; i++)
{
if ([[control.subviews objectAtIndex:i]isSelected] )
{
UIColor *tintcolor=[UIColor colorWithRed:127.0/255.0 green:161.0/255.0 blue:183.0/255.0 alpha:1.0];
[[control.subviews objectAtIndex:i] setTintColor:tintcolor];
} else {
UIColor *tintcolor=[UIColor grayColor]; // default color
[[control.subviews objectAtIndex:i] setTintColor:tintcolor];
}
}
I know this is an old question But now in xcode 11 +, you can set selected segment Tint colour
In code us can use selectedSegmentTintColor. available iOS 13+
Here is my modified version of uihacker's CustomSegmentedControl (see credit in comment). The idea is I change the way to find the subview that should have the tintColor changed, from using selectedIndex to isSelected method. Because I was working with a custom UISegmentedControl that has 3 or more segments which the subview ordering changes randomly (even uihacker's "hasSetSelectedIndexOnce" flag doesn't fix this!). The code is still in early dev stage so use it at your own risk. Any comment is welcomed :)
Also, I added support to interface builder, and override setSelectedSegmentIndex so that it also updates the color. Enjoy!
CustomSegmentedControl.h
//
// CustomSegmentedControl.h
//
// Created by Hlung on 11/22/54 BE.
// Copyright (c) 2554 __MyCompanyName__. All rights reserved.
//
// Credit: http://uihacker.blogspot.com/2010/05/iphone-uisegmentedcontrol-custom-colors.html
#interface CustomSegmentedControl : UISegmentedControl {
UIColor *offColor,*onColor;
}
#property (nonatomic,retain) UIColor *offColor,*onColor;
-(id)initWithItems:(NSArray *)items offColor:(UIColor*)offcolor onColor:(UIColor*)oncolor;
#end
CustomSegmentedControl.m
#import "CustomSegmentedControl.h"
#interface CustomSegmentedControl (private)
-(void)setInitialMode;
-(void)toggleHighlightColors;
#end
#implementation CustomSegmentedControl
#synthesize offColor,onColor;
-(id)initWithItems:(NSArray *)items offColor:(UIColor*)offcolor onColor:(UIColor*)oncolor {
if (self = [super initWithItems:items]) {
// Initialization code
self.offColor = offcolor;
self.onColor = oncolor;
[self setInitialMode];
// default to 0, other values cause arbitrary highlighting bug
[self setSelectedSegmentIndex:0];
}
return self;
}
- (void)awakeFromNib {
// default colors
self.offColor = [UIColor colorWithWhite:0.8 alpha:1];
self.onColor = self.tintColor;
[self setInitialMode];
[self setSelectedSegmentIndex:0];
}
-(void)setInitialMode
{
// set essential properties
[self setBackgroundColor:[UIColor clearColor]];
[self setSegmentedControlStyle:UISegmentedControlStyleBar];
// loop through children and set initial tint
for( int i = 0; i < [self.subviews count]; i++ )
{
[[self.subviews objectAtIndex:i] setTintColor:nil];
[[self.subviews objectAtIndex:i] setTintColor:offColor];
}
// listen for updates, [self setSelectedSegmentIndex:0] triggers UIControlEventValueChanged in 5.0, 4.3 doesn't (facepalm), use if( self.window ) to fix this
[self addTarget:self action:#selector(toggleHighlightColors) forControlEvents:UIControlEventValueChanged];
}
// ---------------
// hlung's version
// ---------------
-(void)toggleHighlightColors
{
// the subviews array order randomly changes all the time, change to check for "isSelected" instead
for (id v in self.subviews) {
if ([v isSelected]) [v setTintColor:onColor];
else [v setTintColor:offColor];
}
}
// override: update color when set selection
- (void)setSelectedSegmentIndex:(NSInteger)selectedSegmentIndex {
[super setSelectedSegmentIndex:selectedSegmentIndex];
[self toggleHighlightColors];
}
// ---------------
#end
Use this:
[[UISegmentedControl appearance] setTitleTextAttributes:#{NSForegroundColorAttributeName : [UIColor colorWithRed:255.0/255 green:37.0/255 blue:99.0/255 alpha:1.0]} forState:UIControlStateSelected];
Not sure if this will get approved by the app store, but I wrote a subclass to UISegmentedControl that lets you set a custom selected and unselected color. Check the notes for more info:
http://uihacker.blogspot.com/2010/05/iphone-uisegmentedcontrol-custom-colors.html
To clarify the answer provided above by #jothikenpachi we found the following UISegmentController category worked well in iOS6 and allows for an arbitrary on/off color scheme on segments. Plus it will fail gracefully if the private methods isSelected/setTintColor: are changed in future OS releases. Caveats around private API calls, etc.
#implementation UISegmentedControl(CustomTintExtension) {
-(void) updateCustomTintColorOn:(UIColor*)onColor Off:(UIColor*)offColor {
// Convenience function to rest the tint colors after selection, called upon change of selected index
SEL tint = #selector(setTintColor:);
for (UIView *view in [self subviews]) {
// Loop through the views...
if (view && ([view respondsToSelector:tint])) {
[view performSelector:tint withObject:nil];
}
if (view && ([view respondsToSelector:tint])) {
[view performSelector:tint withObject:offColor];
}
}
// Checking if segment subview is selected...
SEL isSelected = #selector(isSelected);
for (UIView *view in [self subviews]) {
if ([view respondsToSelector:isSelected] && [view performSelector:isSelected withObject:nil])
{
[view performSelector:tint withObject:onColor];
break;
}
}
}
Note, this category method would be called from within the UISegmentController's - (IBAction) segmentAction: (id)sender method.
Also note that with iOS6 it seems you may need to call this method initially in the governing UIViewController's - (void)viewDidAppear:(BOOL)animated which may result in a animation flash. To minimize this, try setting the "offColor" as the UISegmentController's tintColor in IB.
I just ran into this issue on iOS 7, which works differently than iOS6.
In iOS 7, the color of the label for the selected segment is the same color as the UISegementControl background. The only way to change it on iOS 7 is to set the background color of the UISegmentControl.
segmentControl.backgroundColor = customColor;
I used this and it changed all the colors in one step.
mySegmentedControl.tintColor = [UIColor redColor]
I found I could use tag on the subviews with the same index as the segments, so that in any order they the segments will be colored correctly.
// In viewWillAppear set up the segmented control
// then for 3 segments:
self.navigationItem.titleView = segmentedControl;
//Order of subviews can change randomly!, so Tag them with same index as segment
[[[segmentedControl subviews]objectAtIndex:0]setTag:0];
[[[segmentedControl subviews]objectAtIndex:1]setTag:1];
[[[segmentedControl subviews]objectAtIndex:2]setTag:2];
// color follows the selected segment
- (IBAction)mySelector:(id)sender {
selector = [sender selectedSegmentIndex]
for (id seg in [segmentedControl subviews]) {
for (id label in [seg subviews]) {
if ([seg tag] == selector){
[seg setTintColor:selectedColor];
} else {
[seg setTintColor:nonSelectedColor];
}
}
}
}
// in viewDidAppear for returning to the view
[segmentedControl setSelectedSegmentIndex:selector];
for (id seg in [segmentedControl subviews]) {
for (id label in [seg subviews]) {
if ([seg tag] == selector){
[seg setTintColor:selectedColor];
} else {
[seg setTintColor:nonSelectedColor];
}
}
}
The top two solutions didn't work for me when switching between segments.
My solution was to handle the segment change event in my view controller and then call this method each time the segment is changed:
+ (void)setSegmentedControl:(UISegmentedControl *)segmentedControl
selectedColor:(UIColor *)selectedColor
deselectedColor:(UIColor *)deselectedColor
{
for (int i = 0; i < segmentedControl.subviews.count; i++)
{
id subView = [segmentedControl.subviews objectAtIndex:i];
if ([subView isSelected])
[subView setTintColor:selectedColor];
else
[subView setTintColor:deselectedColor];
}
}
I am wondering why anyone have not mentioned about UIAppearanceProxy
Apple Doc::
https://developer.apple.com/documentation/uikit/uisegmentedcontrol#1653545
Sample Code:
private class func applyUISegmentControlAppearance(){
let apperance = UISegmentedControl.appearance()
// Set Navigation bar Title colour
let unselAttrib = [NSForegroundColorAttributeName:UIColor.yellow,
NSFontAttributeName: UIFont.systemFont(ofSize: 15)]
let selAttrib = [NSForegroundColorAttributeName:UIColor.red,
NSFontAttributeName: UIFont.boldSystemFont(ofSize: 15)]
apperance.setTitleTextAttributes(unselAttrib, for: .normal)
apperance.setTitleTextAttributes(selAttrib, for: .selected)
}
Call From:
You can call this method in AppDelegate from
application(_ application: UIApplication, willFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool
For doing your kind of thing, one might have to access the undocumented features and hacks, which will certainly make apple furious, and that may lead to the rejection of your application.
Now, the solution lies in other trick that you use two buttons instead and have their images interchanged when they are clicked. Keep the buttons closer and images of half segmented control to give the illusion of segmented control and that is all I can suggest you.
Hope this helps.
Thanks,
Madhup
You can tag each of the segments, then set the TintColor forTag:
#define kTagOffState 0
#define kTagOnState 2
#define UIColorFromRGB(rgbValue) [UIColor \
colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 \
green:((float)((rgbValue & 0xFF00) >> 8))/255.0 \
blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]
//usage UIColor color = UIColorFromRGB(0xF7F7F7);
UIColor onColor = UIColorFromRGB(0xF7F7F7);
UIColor offColor = UIColorFromRGB(0x878787);
[multiStateControl setTag:kTagOffState forSegmentAtIndex:0];
[multiStateControl setTag:kTagOnState forSegmentAtIndex:1];
[multiStateControl setTintColor:onColor forTag:kTagOnState];
[multiStateControl setTintColor:offColor forTag:kTagOffState];
I found the answers above very helpful. I am using the segmented control to set the precision of a knob. I took a hybrid of the answers above and came up with this:
-(void) viewDidLoad {
NSArray *segments = [NSArray arrayWithObjects:#"Course", #"Fine",nil];
[knob setPrecision:0.1]; // initial precision
// Set starting values
UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:segments];
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
segmentedControl.frame = CGRectMake(120, 680, 228, 30);
[segmentedControl addTarget:self action:#selector(precisionSelect:) forControlEvents:UIControlEventValueChanged];
segmentedControl.momentary = YES;
[self.view addSubview:segmentedControl];
}
- (void)precisionSelect:(UISegmentedControl*)sender
{
UIColor *tintcolor = [UIColor darkGrayColor];
if (sender.selectedSegmentIndex == 0) {
[[sender.subviews objectAtIndex:0] setTintColor:nil];
[[sender.subviews objectAtIndex:1] setTintColor:tintcolor];
[knob setPrecision:0.1]; // Coarse
} else {
[[sender.subviews objectAtIndex:0] setTintColor:tintcolor];
[[sender.subviews objectAtIndex:1] setTintColor:nil];
[knob setPrecision:0.05]; // Fine
}
}
Hope this helps others..
A key for me, was being able to reset the unselected index using: setTintColor:nil];
- (IBAction)segmentControlValueChanged:(UISegmentedControl *)sender
{
if ([[sender.subviews firstObject] respondsToSelector:#selector(setTintColor:)]) {
for (id segment in sender.subviews) {
if ([segment respondsToSelector:#selector(isSelected)] && [segment isSelected]) {
[segment setTintColor:[UIColor redColor]];
} else {
[segment setTintColor:[UIColor grayColor]];
}
}
}
}
Try this solution.
#IBAction func dashBoardSegmentValueChanged(sender: AnyObject) {
switch dashBoardSegment.selectedSegmentIndex
{
case 0:
sender.subviews.last?.backgroundColor = UIColor.whiteColor()
sender.subviews.first?.backgroundColor = UIColor.clearColor()
break;
case 1:
sender.subviews.first?.backgroundColor = UIColor.whiteColor()
sender.subviews.last?.backgroundColor = UIColor.clearColor()
break;
default:
break;
}
}
Note: Make sure you select one segment subview as initial selected for easiness. It works if you have two segment subviews.
- (IBAction)segmentedControlValueChanged:(UISegmentedControl *)sender {
for (int i = 0; i < sender.subviews.count; i++) {
UIControl *component = [sender.subviews objectAtIndex:i];
if ([component respondsToSelector:#selector(isSelected)]) {
UIColor *selectedColor = [UIColor greenColor];
UIColor *normalColor = [UIColor blackColor];
UIColor *tint = component.isSelected ? selectedColor : normalColor;
[component setTintColor:tint];
}
}
}
[segmentedControl setSelectedSegmentTintColor:[UIColor darkGrayColor]];
//For iOS 13
This Swift 4 code works for me
segmentedControl.setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.red], for: .selected)