I am trying to adjust the size of the text in my UITextView so it fits. I have the following code:
NSString *storyTitle = [newsfeedToSubject.properties valueForKey:#"title"];
int currentFontSize = 18;
UIFont *currentFont = [UIFont fontWithName:kProximaNovaBold size:currentFontSize];
CGSize storyTitleSize = [storyTitle sizeWithFont:currentFont constrainedToSize:self.newsfeedStoryTitle_.frameSize lineBreakMode:UILineBreakModeWordWrap];
while (storyTitleSize.height >= self.newsfeedStoryTitle_.frameHeight){
currentFontSize--;
currentFont = [UIFont fontWithName:kProximaNovaBold size:currentFontSize];
storyTitleSize = [storyTitle sizeWithFont:currentFont constrainedToSize:self.newsfeedStoryTitle_.frameSize lineBreakMode:UILineBreakModeWordWrap];
}
[self.newsfeedStoryTitle_ setFont:currentFont];
[self.newsfeedStoryTitle_ setText:storyTitle];
[self.newsfeedStoryTitle_ setBackgroundColor:[UIColor redColor]];
However, here's what I am getting:
I tried with different line break mode and also set the autoresize to none, but it didn't help. Any idea?
Your while loop will not do what you want because you are using
storyTitleSize.height
to determine the size of the frame, which will not take into account the wrap around effect of the text. One suggestion would be to truncate the string and only display a certain amount of characters of the title. Otherwise, you will need to calculate how many line breaks you will have, based on the width of the frame and the length of the string, and use
while(storyTitleSize.height * numLineBreaks >= self.newsFeedStoryTitle_.frameHeight)
{
...
}
Hope that helps.
You can also dynamically resize your frame (UITextView) as in this thread
try these code
while (self.textView.contentSize.height >= frameHeight){
currentFontSize--;
currentFont = [UIFont fontWithName:kProximaNovaBold size:currentFontSize];
[self.textView setFont:currentFont];
self.textView.text = #"your string";
}
Related
I'm making my app transition to iOS 7 and have this method (already modified for iOS 7, using boundingRectWithSize...):
+ (CGSize)messageSize:(NSString*)message {
NSDictionary *attributes = #{NSFontAttributeName : [UIFont fontWithName:#"Futura-Medium" size:13]};
CGRect frame = [message boundingRectWithSize:CGSizeMake([PTSMessagingCell maxTextWidth], CGFLOAT_MAX) options:NSStringDrawingUsesFontLeading attributes:attributes context:nil];
return frame.size;
}
I am getting this appearance:
The message UILabel is being cut. It feels like line spacing is too big. It tried many other answers I found but none of them work.
If someone knows how to help me, I appreciate! ;)
Thanks!
Try changing NSStringDrawingUsesFontLeading as your option to NSStringDrawingUsesLineFragmentOrigin.
If you were only supporting iOS 6 and iOS 7, then I would definitely change all of your NSString's sizeWithFont:... to the NSAttributeString's boundingRectWithSize. Starting in iOS 6, the NSAttributedString's NSStringDrawing functions were introduced and they're threadsafe unlike the old NSString+UIKit methods we're used to (eg. sizeWithFont:..., etc), which were UIStringDrawing functions (and act unpredictably when you use them from a non-main thread. It'll save you a lot of headache if you happen to have a weird multi-threading corner case! Here's how I converted NSString's sizeWithFont:constrainedToSize::
What used to be:
NSString *text = ...;
CGFloat width = ...;
UIFont *font = ...;
CGSize size = [text sizeWithFont:font
constrainedToSize:(CGSize){width, CGFLOAT_MAX}];
Can be replaced with:
NSString *text = ...;
CGFloat width = ...;
UIFont *font = ...;
NSAttributedString *attributedText =
[[NSAttributedString alloc]
initWithString:text
attributes:#
{
NSFontAttributeName: font
}];
CGRect rect = [attributedText boundingRectWithSize:(CGSize){width, CGFLOAT_MAX}
options:NSStringDrawingUsesLineFragmentOrigin
context:nil];
CGSize size = rect.size;
Please note the documentation mentions:
In iOS 7 and later, this method returns fractional sizes (in the size
component of the returned CGRect); to use a returned size to size
views, you must use raise its value to the nearest higher integer
using the ceil function.
So to pull out the calculated height or width to be used for sizing views, I would use:
CGFloat height = ceilf(size.height);
CGFloat width = ceilf(size.width);
I think you are updating your label frame from either viewDidLoad or viewWillAppear, so it is not working.
if you will update frame of label from viewDidAppear method then you will get updated frame of label.
I am not sure why this is happened, I think it is iOS 7 bug.
Try this
+ (CGSize)messageSize:(NSString*)message {
CGSize nameSize = [message sizeWithFont:[UIFont fontWithName:#"Futura-Medium" size:13]
constrainedToSize:CGSizeMake(maxWidth, maxHeight) lineBreakMode:NSLineBreakByWordWrapping];
NSLog(#"width = %f, height = %f", nameSize.width, nameSize.height);
return nameSize;
}
This question already has answers here:
Closed 12 years ago.
Possible Duplicate:
How can i fix my scrollView dynamically when i have more than one textViews in it?
I made a scrollView in interface builder and put 3 textViews and 2 button in that. Sometimes textViews have more text and sometimes less. i managed to give them flexible frame size. but if top textView has more text then some of its text comes over 2nd textView. i tried this code. i think it should work but its not working properly.
storyTitle.text = sTitle;
storyTitle.font = [UIFont boldSystemFontOfSize:18];
date.text = sDate;
date.font = [UIFont systemFontOfSize:16];
summary.text = sSummary;
summary.font = [UIFont systemFontOfSize:16];
CGRect titleFrame = storyTitle.frame;
titleFrame.size.height = storyTitle.contentSize.height;
storyTitle.frame = titleFrame;
CGRect dateFrame = date.frame;
dateFrame.size.height = label.contentSize.height;
date.frame = dateFrame;
CGRect summaryFrame = summary.frame;
summaryFrame.size.height = summary.contentSize.height;
summary.frame = summaryFrame;
CGRect topTextViewFrame = storyTitle.frame;
CGRect middleTextViewFrame = date.frame;
NSLog(#"size: %d",topTextViewFrame.origin.y);
middleTextViewFrame.origin.y = topTextViewFrame.origin.y + topTextViewFrame.size.height;
CGRect bottomTextViewFrame = summary.frame;
bottomTextViewFrame.origin.y = middleTextViewFrame.origin.y + middleTextViewFrame.size.height;
// then adjust other controls based on these frames, for example:
CGRect myButtonFrame = detailButton.frame;
myButtonFrame.origin.y = bottomTextViewFrame.origin.y + bottomTextViewFrame.size.height;
CGRect myButtonFrame2 = fbButton.frame;
myButtonFrame2.origin.y = myButtonFrame.origin.y + myButtonFrame.size.height;
// finally adjust the contentSize of the scrollview assuming the button is the bottom element
CGSize csize = scrollView.contentSize;
csize.height = myButtonFrame2.origin.y + myButtonFrame2.size.height;
scrollView.contentSize = csize;
can anyone tell me whats wrong with this? and how should i right it so it ll work fine. thanx in advance
hi if your text is not editable by user the try using UILabel instead of UITextView.If you set numberOfLines property of UILabel = 0 then it can go to more that one line and then u can calculate the required height for the label by the method
CGSize size = [label.text sizeWithFont:label.font constrainedToSize:CGSizeMake(label.frame.size.width, FLT_MAX) lineBreakMode:UILineBreakModeWordWrap ];
the u can set the frame of label according to height you get form here like
label.frame = CGRectMake(label.frame.origin.x,label.frame.origin.y,label.frame.size.width,size.height);
and if you have such multiple labels the uyou can do following
CGSize size = [label1.text sizeWithFont:label1.font constrainedToSize:CGSizeMake(label1.frame.size.width, FLT_MAX) lineBreakMode:UILineBreakModeWordWrap ];
label1.frame = CGRectMake(label1.frame.origin.x,label1.frame.origin.y,label1.frame.size.width,size.height);
size = [label2.text sizeWithFont:label2.font constrainedToSize:CGSizeMake(label2.frame.size.width, FLT_MAX) lineBreakMode:UILineBreakModeWordWrap ];
label2.frame = CGRectMake(label2.frame.origin.x,label1.frame.origin.y+label1.frame.size.height+10,label2.frame.size.width,size.height);
size = [label3.text sizeWithFont:label3.font constrainedToSize:CGSizeMake(label3.frame.size.width, FLT_MAX) lineBreakMode:UILineBreakModeWordWrap ];
label3.frame = CGRectMake(label3.frame.origin.x,label2.frame.origin.y+label2.frame.size.height+10,label3.frame.size.width,size.height);
and finaly you can adjust the content height of your scroll view according tho last label.
I'm trying to create a simple custom UIView wich contain a string drawn with a single font, but where the first character is slightly larger.
I thought this would be easily implemented with two UILabel:s placed next to eachother.
I use NSString sizeWithFont to measure my string to be able to lay it out correctly.
But I noticed that the font baseline in the returned rectangle varies with +/- 1 pixel depending on the font size I set.
Here is my code:
NSString* ctxt = [text substringToIndex:1];
NSString* ttxt = [text substringFromIndex:1];
CGSize sz = [ctxt sizeWithFont: cfont ];
clbl = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, sz.width, sz.height)];
clbl.text = ctxt;
clbl.font = cfont;
clbl.backgroundColor = [UIColor clearColor];
[contentView addSubview:clbl];
CGSize sz2 = [ttxt sizeWithFont: tfont];
tlbl = [[UILabel alloc] initWithFrame:CGRectMake(sz.width, (sz.height - sz2.height), sz2.width, sz2.height)];
tlbl.text = ttxt;
tlbl.font = tfont;
tlbl.backgroundColor = [UIColor clearColor];
[contentView addSubview:tlbl];
If I use 12.0 and 14.0 as sizes, it works fine.
But if I instead use 13.0 and 15.0, then the first character is 1 pixel too high.
Is this a known problem?
Any suggestions how to work around it?
Creating a UIWebView with a CSS and HTML page seems way overkill for this. and more work to handle dynamic strings. Is that what I'm expected to do?
Found the answer...
Ofcourse, I also have to check the descender value on the font, and compensate for that in the layout.
New rect for the second label is:
CGRectMake(sz.width, (sz.height - sz2.height) + floor(cfont.descender - tfont.descender), sz2.width, sz2.height)
floor() is to make sure it snaps to pixel position, or the font will look blurry
I know there is this one:
sizeWithFont:minFontSize:actualFontSize:forWidth:lineBreakMode:
But since the CGSize always has the same height and doesn't adjust to any shrinked text or whatsoever, the CGSize is not telling how heigh the text is.
Example: Make a UILabel with 320 x 55 points and put a loooooooooooooong text in there. Let the label shrink the text down. Surprise: CGSize.height remains the same height even if the text is so tiny that you need a microscope.
Ok so after banging my head against my macbook pro which is half way broken now, the only think that can help is that nasty actualFontSize. But the font size is in pica I think, it's not really what you get on the screen, isn't it?
When that font size is 10, is my text really 10 points heigh at maximum? Once in a while I tried exactly that, and as soon as the text had a y or some character that extends to below (like that tail of an y does), it is out of bounds and the whole text is bigger than 10 points.
So how would you calculate the real text height for a single line uilabel without getting a long beard and some hospital experience?
Try this code:
CGSize maximumSize = CGSizeMake(300, 9999);
NSString *myString = #"This is a long string which wraps";
UIFont *myFont = [UIFont fontWithName:#"Helvetica" size:14];
CGSize myStringSize = [myString sizeWithFont:myFont
constrainedToSize:maximumSize
lineBreakMode:self.myLabel.lineBreakMode];
from my answer here
It uses a different method, and sets up a very high CGSize at the start (which is then shrunk to fit the string)
Important: As of iOS 7.0 the following method is deprecated.
sizeWithFont:minFontSize:actualFontSize:forWidth:lineBreakMode:
Use the below code instead
CGRect frame = [cellText boundingRectWithSize:CGSizeMake(568,320) options:NSStringDrawingUsesLineFragmentOrigin attributes:#{NSFontAttributeName:[UIFont systemFontOfSize:32.0f]} context:nil];
float height = frame.size.height;
Sounds like after you get the actual font size from that function call, you need to call again with that new size:
NSString* yourString = #"SomeString";
float actualSize;
[yourString sizeWithFont:yourFont
minFontSize:minSize
actualFontSize:&actualSize
forWidth:rectWidth
lineBreakMode:breakMode];
CGSize size = [yourString sizeWithFont:[UIFont fontWithName:fontName size:actualSize]];
Also have you set label.numberOfLines = 0; ?
After running this code frame.size will have the height and width of your nsstring exactly..
NSString *text = #"This is my Mac";
textFont = [NSFont fontWithName:#"HelveticaNeue-Medium" size: 80.f];
textColor = [NSColor yellowColor];
NSDictionary *attribs = #{ NSForegroundColorAttributeName:textColor,
NSFontAttributeName: textFont };
CGRect frame = [text boundingRectWithSize:CGSizeMake(0,0) options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesDeviceMetrics attributes:attribs context:nil];
When myLabel.adjustsFontSizeToFitWidth = YES, UILabel will adjust the font size automatically in case the text is too long for the label. For example, if my label is just 100px wide, and my text is too long to fit with the current font size, it will shrink down the font size until the text fits into the label.
I need to get the actual displayed font size from UILabel when the font size got shrunk down. For example, let's say my font size was actually 20, but UILabel had to shrink it down to 10. When I ask UILabel for the font and the font size, I get my old font size (20), but not the one that's displayed (10).
I'm not sure if this is entirely accurate, but it should be pretty close, hopefully. It may not take truncated strings into account, or the height of the label, but that's something you might be able to do manually.
The method
- (CGSize)sizeWithFont:(UIFont *)font minFontSize:(CGFloat)minFontSize actualFontSize:(CGFloat *)actualFontSize forWidth:(CGFloat)width lineBreakMode:(UILineBreakMode)lineBreakMode
will return the text size, and notice that it also has a reference parameter for the actual font size used.
In case anybody still needs the answer.
In iOS9 you can use boundingRectWithSize:options:context: to calculate actual font size. Note that context.minimumScaleFactor should not be 0.0 for scaling to work.
- (CGFloat)adjustedFontSizeForLabel:(UILabel *)label {
NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithAttributedString:label.attributedText];
[text setAttributes:#{NSFontAttributeName:label.font} range:NSMakeRange(0, text.length)];
NSStringDrawingContext *context = [NSStringDrawingContext new];
context.minimumScaleFactor = label.minimumScaleFactor;
[text boundingRectWithSize:label.frame.size options:NSStringDrawingUsesLineFragmentOrigin context:context];
CGFloat adjustedFontSize = label.font.pointSize * context.actualScaleFactor;
return adjustedFontSize;
}
For one-line UILabel works fine this simple solution:
//myLabel - initial label
UILabel *fullSizeLabel = [UILabel new];
fullSizeLabel.font = myLabel.font;
fullSizeLabel.text = myLabel.text;
[fullSizeLabel sizeToFit];
CGFloat actualFontSize = myLabel.font.pointSize * (myLabel.bounds.size.width / fullSizeLabel.bounds.size.width);
//correct, if new font size bigger than initial
actualFontSize = actualFontSize < myLabel.font.pointSize ? actualFontSize : myLabel.font.pointSize;
Swift 5
For one-line UILabel
extension UILabel {
var actualFontSize: CGFloat {
//initial label
let fullSizeLabel = UILabel()
fullSizeLabel.font = self.font
fullSizeLabel.text = self.text
fullSizeLabel.sizeToFit()
var actualFontSize: CGFloat = self.font.pointSize * (self.bounds.size.width / fullSizeLabel.bounds.size.width);
//correct, if new font size bigger than initial
actualFontSize = actualFontSize < self.font.pointSize ? actualFontSize : self.font.pointSize;
return actualFontSize
}
}
Getting the actual font size is then as simple as:
let currentLabelFontSize = myLabel.actualFontSize
UILabel *txtLabel = [[UILabel alloc] initWithFrame:rectMax];
txtLabel.numberOfLines = 1;
txtLabel.font = self.fontMax;
txtLabel.adjustsFontSizeToFitWidth = YES;
txtLabel.minimumScaleFactor = 0.1;
[txtLabel setText:strMax];
UILabel *fullSizeLabel = [UILabel new];
fullSizeLabel.font = txtLabel.font;
fullSizeLabel.text = txtLabel.text;
fullSizeLabel.numberOfLines = 1;
[fullSizeLabel sizeToFit];
CGFloat actualFontSize = txtLabel.font.pointSize * (txtLabel.bounds.size.width / fullSizeLabel.bounds.size.width);
actualFontSize = actualFontSize < txtLabel.font.pointSize ? actualFontSize : txtLabel.font.pointSize;
// the actual font
self.fontMax = [UIFont fontWithName:self.fontMax.fontName size:actualFontSize];
my code works great, part from #Igor