I have this code to rotate a horizontal slider:
- (void)viewDidLoad {
[super viewDidLoad];
CGAffineTransform trans = CGAffineTransformMakeRotation(M_PI * 0.5);
sliderLine.transform = trans;
I can't get it to rotate. I'm assuming something along the lines of this in the .h file?:
UISlider *sliderLine;
or
#property (nonatomic,retain) IBOutlet UISlider *sliderLine;
is needed in the header? Something like that?
I took your code for horizontal slider and did something like this:
- (void)viewDidLoad {
[super viewDidLoad];
sliderLine.transform = CGAffineTransformRotate(sliderLine.transform, 270.0/180*M_PI);
It works fine for me.
slider.transform=CGAffineTransformRotate(slider.transform , 270.0/180*M_PI);
try this.Above, slider is the slidername.
Related
The Horizontal Scroll will work fine, but UIpagecontroller will not work means it will not change, As I scroll the page. I can't able to identify the error. Please see below code
#import "ViewController.h"
#interface ViewController ()
#property (strong, nonatomic) IBOutlet UIScrollView *scroll;
#property (strong, nonatomic) IBOutlet UIPageControl *pgcnt;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
NSArray *arry=[NSArray arrayWithObjects:#"a",#"b",#"c",#"e",#"f", nil];
for (int i=0; i<arry.count; i++) {
CGRect frame;
[self.scroll setPagingEnabled:YES];
_scroll.pagingEnabled=YES;
_scroll.bounces = YES;
[_scroll setShowsHorizontalScrollIndicator:NO];
[_scroll setShowsVerticalScrollIndicator:NO];
frame.origin.x=_scroll.frame.size.width*i;
frame.size=_scroll.frame.size;
UIView *view=[[UIView alloc]initWithFrame:frame];
view.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:[arry objectAtIndex:i]]];
[_scroll addSubview:view];
[self.pgcnt setCurrentPage:i];
// self.pgcnt.numberOfPages=arry.count;
}
_scroll.contentSize=CGSizeMake(_scroll.frame.size.width*arry.count,_scroll.frame.size.height);
// Do any additional setup after loading the view, typically from a nib.
}
Any suggestion or help will appreciated
I found the solution , no one helped me, but its ok, i will help other people .i Didn't added delegate method thats why the Pagecontrol dot will not worked. But now working fine.
pragma mark - UIScrollView Delegate
- (void)scrollViewDidScroll:(UIScrollView *)sender
{
// Update the page when more than 50% of the previous/next page is visible
CGFloat pageWidth = self.scroll.frame.size.width;
int page = floor((self.scroll.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
self.pgcnt.currentPage = page;
}
thanks for
http://iosmadesimple.blogspot.in/2013/01/page-control-for-switching-between-views.html
I can't quite figure out what's going on but I have a view that displays a subview when a users selects a button. This subview then also has a button the user can select to cancel and remove this subview. When all of this happens, my app crashes when you attempt to close the subview.
This is my code:
From the main view that shows the subview when a button is selected -
-(IBAction)sendMessage:(id)sender{
NSLog(#"Going to send a message....");
CGRect frameBounds = [self.view bounds];
float frameWidth = frameBounds.size.width;
float frameHeight = frameBounds.size.height;
float frameX = frameBounds.origin.x;
//float frameY = frameBounds.size.height / 2;
float frameY = frameBounds.size.height;
float finalY = frameBounds.size.height / 1.75;
MessageChooserController *chooser = [[MessageChooserController alloc] initWithNibName:#"MessageChooser" bundle:nil];
//Set the frame off the screen at the bottom
chooser.view.frame = CGRectMake(frameX, frameY, frameWidth, frameHeight);
[self.view addSubview:chooser.view];
[UIView animateWithDuration:0.5 animations:^{chooser.view.frame = CGRectMake(frameX, finalY, frameWidth, frameHeight);}];
}
As you can see this simply shows a new subview - MessageChooserController. Now this subview, MessageChooserController has a button to cancel this "action".
The header file for MessageChooserController:
#import <UIKit/UIKit.h>
#interface MessageChooserController : UIViewController
#property (weak, nonatomic) IBOutlet UIButton *btn_sendEmail;
#property (weak, nonatomic) IBOutlet UIButton *btn_sendText;
#property (weak, nonatomic) IBOutlet UIButton *btn_cancel;
-(IBAction)closeChooser:(id)sender;
#end
And its implementation:
#import "MessageChooserController.h"
#interface MessageChooserController ()
#end
#implementation MessageChooserController
#synthesize btn_cancel, btn_sendEmail, btn_sendText;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
/*
[btn_cancel setBackgroundImage:[[UIImage imageNamed:#"iphone_delete_button.png"] stretchableImageWithLeftCapWidth:8.0f topCapHeight:0.0f] forState:UIControlStateNormal];
*/
/*
UIImage *cancelButtonImage = [[UIImage imageNamed:#"iphone_delete_button"] resizableImageWithCapInsets:UIEdgeInsetsMake(30,0,30,0)resizingMode:UIImageResizingModeStretch];
[btn_cancel setBackgroundImage:cancelButtonImage forState:UIControlStateNormal];
*/
}
-(IBAction)closeChooser:(id)sender{
[self.view removeFromSuperview];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
As you can see I have a simple method to close this subview, closeChooser. All of this compiles but when I select the cancel button on the subview my app crashes. I can't find anything anywhere about this.
Essentially I want to have a view display like it does when you select "Send message" from your contacts.
The correct way of doing this is calling [self presentModalViewController:viewController] on the parent view controller and then calling [self dismissModalViewController] when you want to hide it.
Well, i have gone through some decent goggling before posting this question but was unsuccessful in finding the right answers.
I cant really explain my entire app scenario here as it is a bit complex to explain. So, let me make this question very very simple. How can i change the frame of the UIKeyBoard.i.e. I want the UIKeyBoard to rotate or translate 90 degrees upwards to support my view position.
Is there a way out for me?
You can't change the default keyboard. You can, however, create a custom UIView to be used as keyboard replacement by setting it as inputView on, for example, a UITextField.
While creating a custom keyboard takes a bit of time, it works well with older iOS versions (inputView on the UITextField is available in iOS 3.2 and later) and supports physical keyboards (the keyboard is hidden automatically if one is connected).
Here's some sample code to create a vertical keyboard:
Interface:
#import <UIKit/UIKit.h>
#interface CustomKeyboardView : UIView
#property (nonatomic, strong) UIView *innerInputView;
#property (nonatomic, strong) UIView *underlayingView;
- (id)initForUnderlayingView:(UIView*)underlayingView;
#end
Implementation:
#import "CustomKeyboardView.h"
#implementation CustomKeyboardView
#synthesize innerInputView=_innerInputView;
#synthesize underlayingView=_underlayingView;
- (id)initForUnderlayingView:(UIView*)underlayingView
{
// Init a CustomKeyboardView with the size of the underlying view
// You might want to set an autoresizingMask on the innerInputView.
self = [super initWithFrame:underlayingView.bounds];
if (self)
{
self.underlayingView = underlayingView;
// Create the UIView that will contain the actual keyboard
self.innerInputView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, underlayingView.bounds.size.height)];
// You would need to add your custom buttons to this view; for this example, it's just red
self.innerInputView.backgroundColor = [UIColor redColor];
[self addSubview:self.innerInputView];
}
return self;
}
-(id)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
// A hitTest is executed whenever the user touches this UIView or any of its subviews.
id hitTest = [super hitTest:point withEvent:event];
// Since we want to ignore any clicks on the "transparent" part (this view), we execute another hitTest on the underlying view.
if (hitTest == self)
{
return [self.underlayingView hitTest:point withEvent:nil];
}
return hitTest;
}
#end
Using the custom keyboard in some UIViewController:
- (void)viewDidLoad
{
[super viewDidLoad];
CustomKeyboardView *customKeyboard = [[CustomKeyboardView alloc] initForUnderlayingView:self.view];
textField.inputView = customKeyboard;
}
I'm trying to create a CGRect inside of a custom view (rectView) that will move up and down as you move a slider.
My slider's IBAction calls the following method: (which get's called fine)
- (void)moveRectUpOrDown:(int)y
{
self.verticalPositionOfRect += y;
[self setNeedsDisplay];
}
My drawRect method:
- (void)drawRect:(CGRect)rect
{
CGContextRef context = UIGraphicsGetCurrentContext();
CGFloat size = 100;
self.rect = CGRectMake((self.bounds.size.width / 2) - (size / 2),
self.verticalPositionOfRect - (size / 2),
size,
size);
CGContextAddRect(context, self.rect);
CGContextFillPath(context);
}
My custom view's initWithFrame calls the drawRect method using setNeedsDisplay, but for some reason the moveRectUpOrDown won't call drawRect.
Any ideas what I'm doing wrong?
For clarity the entire implementation is below:
//ViewController.h
#import <UIKit/UIKit.h>
#import "rectView.h"
#interface ViewController : UIViewController
#property (strong, nonatomic) IBOutlet rectView *rectView;
- (IBAction)sliderChanged:(id)sender;
#end
//ViewController.m
#import "ViewController.h"
#implementation ViewController
#synthesize rectView;
- (void)viewDidLoad
{
[super viewDidLoad];
self.rectView = [[rectView alloc] initWithFrame:self.rectView.frame];
}
- (void)viewDidUnload
{
[super viewDidUnload];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
- (IBAction)sliderChanged:(id)sender
{
UISlider *slider = sender;
CGFloat sliderValue = slider.value;
[self.rectView moveRectUpOrDown:sliderValue];
}
#end
//rectView.h
#import <UIKit/UIKit.h>
#interface rectView : UIView
- (void)moveRectUpOrDown:(int)y;
#end
//rectView.m
#import "rectView.h"
#interface rectView ()
#property CGRect rect;
#property int verticalPositionOfRect;
#end
#implementation rectView
#synthesize rect, verticalPositionOfRect;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.verticalPositionOfRect = (self.bounds.size.height / 2);
[self setNeedsDisplay];
}
return self;
}
- (void)moveRectUpOrDown:(int)y
{
self.verticalPositionOfRect += y;
[self setNeedsDisplay];
}
- (void)drawRect:(CGRect)rect
{
CGContextRef context = UIGraphicsGetCurrentContext();
CGFloat size = 100.0;
self.rect = CGRectMake((self.bounds.size.width / 2) - (size / 2),
self.verticalPositionOfRect - (size / 2),
size,
size);
CGContextAddRect(context, self.rect);
CGContextFillPath(context);
}
#end
Thanks for the help :)
OK so the answer is the view is never actually added to the viewController's view..
You have an IBOutlet to your rectView - so I assume you dragged a UIView component onto the view in Interface Builder and then changed it's class to rectView, which is all fine BUT in viewDidLoad you wipe over this object with a new one
self.rectView = [[rectView alloc] initWithFrame:self.rectView.frame];
So this is now no longer the object that was loaded from the xib.
Subsequently this view is never actually added to the view hierarchy so it's never going to draw itself as it does not make sense.
So the solution is to remove the line I highlighted above.
Notes
I would probably still go with my other answer for such an implementation but it's helpful to get tripped up and learn new things.
rectView does not follow naming conventions. Ideally you should start your class name with a 2-3 letter prefix (possibly your initial's or company name) followed by a camel cased named.
I don't see how you initialize CGFloat size. Can you put a value in there and see how it works? The rest of the code looks okay to me.
An easier thing would be to just add a UIView and animate this around.
Add an ivar for this UIView
// .h
#property (nonatomic, strong) UIView *animatedView;
// .m
#synthesize animatedView = _animatedView;
then just replace your logic with this
- (void)moveRectUpOrDown:(int)y;
{
CGRect frame = self.animatedView.frame;
frame.origin.y += y;
// If you want the change to animate uncomment this
// [UIView animateWithDuration:0.25f
// animations:^{
// self.animatedView.frame = frame;
// }];
// If you don't want the change to animate uncomment this
// self.animatedView.frame = frame;
}
I have requirement in which I have tableview as a subview of imageview. Now when the user zooms-in , the text inside the tableview is getting blur. Is there any way to manipulate it at time of zoom-in?
Please follow the steps which is below.
Don't set the position of image statically i mean by giving coordinate.Set the position dynamically or at the run time it will take position based on current window or zoom in zoom out position label,i am not pretty much sure because i havn't faced this situation earlier but as i think it might be use case scenario for solving your problem.
Thanks
I have achieved it by subclassing CALayer for labels. Thanks all for help.
Subclass label as follows :
TiledLable.h file ::
#import <UIKit/UIKit.h>
#import "FastCATiledLayer.h"
#interface TiledLable : UILabel
{
}
#end
TiledLale.m file ::
#import "TiledLable.h"
#import <QuartzCore/QuartzCore.h>
#implementation TiledLable
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self)
{
// Initialization code.
FastCATiledLayer *tiledLayer = (FastCATiledLayer *)[self layer];
tiledLayer.levelsOfDetail = 2;
tiledLayer.levelsOfDetailBias = 2;
tiledLayer.tileSize = CGSizeMake(1024.0,1024.0);
tiledLayer.contents = nil;
self.layer.contents = nil;
}
return self;
}
// Set the layer's class to be CATiledLayer.
+ (Class)layerClass
{
return [FastCATiledLayer class];
}
- (void)dealloc
{
((CATiledLayer *)[self layer]).delegate = nil;
[self removeFromSuperview];
[self.layer removeFromSuperlayer];
[super dealloc];
}
#end