I have a question in my app I have a number label (IBOutlet). And when I write self.numberLabel.backgroundColor = [UIColor redColor]; is showing a red color fit in the height of number, All I want is to make the background a little bit bigger. Thanks
self.numberLabel.frame = CGRectMake(self.numberLabel.frame.origin.x, self.numberLabel.frame.origin.y, widht, newHeight);
and to make sure font stay same size if needed
[self.numberLabel setFont:[UIFont systemFontOfSize:35]];
You have to set constraints in Interface Builder / Storyboard to fix your label height/width.
If your label's content changes in width, you can use this to calculate a new width with a bit of space left:
float labelWidth =
[self.myLabel.text
boundingRectWithSize:self.myLabel.frame.size
options:NSStringDrawingUsesLineFragmentOrigin
attributes:#{ NSFontAttributeName:self.myLabel.font }
context:nil]
.size.width;
CGRect rect = self.myLabel.bounds;
rect.size.width = labelWidth + 15.0f; //replace 15.0F with the value you want
[self.myLabel setBounds:rect];
There're many ways to skin a cat... in my case the content of the "uilabel" determines its size. I just want the background to be slightly bigger -- 5 points vertically, 7 points horizontally. So I use autolayout to solve it.
Add a uilabel as a subview to the background which is a uiview
Add constraints in IB between the uilabel and the uiview
Add constraints in IB between the uiview and its superview
I have a UILabel that contains some text that is more than the size of UILabel. I don't want to change UILabel size i only want one line in it. So my question is how can i skip(remove) the text from end that is causing the UILabel to truncate tail?
I'm afraid there is no a direct method to calculate. But as you can get the size or bounds of a text using boundingRectWithSize:options:attributes: you can iterate using a dichotomic search algorithm and find the string position to cut from.
Use this line to set up the line break mode of your UILabel:
self.lineBreakMode = UILineBreakModeWordWrap
Try this,
I think you are asking for character wrapping trick.
First try in XIB
yourLabel.numberOfLines = 1;
yourLabel.lineBreakMode = NSLineBreakByCharWrapping;
//or
yourLabel.lineBreakMode = NSLineBreakByClipping;
I was doing a similar thing on UITableView Cell recently. This approach is flexible, as you can set any number of lines depending on height you have available. Everything else will be truncated. Check it out:
CGSize maxNameLabelSize = CGSizeMake(350,60); //setting height, you can limit it to one line depending on the font
UILabel *eventName = (UILabel*) ([activityCell.contentView viewWithTag:EVENT_TITLE]);
//Set value here
eventName.text = event.name;
CGSize expectedNameLabelSize = [eventName.text sizeWithFont:eventName.font constrainedToSize:maxNameLabelSize lineBreakMode:eventName.lineBreakMode];
CGRect newNameFrame = eventName.frame;
newNameFrame.size.height = expectedNameLabelSize.height;
eventName.frame = newNameFrame;
Does it makes sense?
I have a UILabel right now and the UILabel.text value changes regularly.
The problem I am having is that if each time the UILabel.text value changes, the UILabel width changes according to the content of the label.
How can I fix this? This is my code I have right now:
outputLabel.text = errorMessage;
outputLabel.hidden = NO;
[outputLabel sizeToFit];
UPDATE
The reason I am using sizeToFit is because I need the height to automatically change.
Thanks,
Peter
you can create a category or a subclass of UILabel and add this method to resize only the height of the label depending to the input text
- (void)heightToFit {
CGSize maxSize = CGSizeMake(self.frame.size.width, CGFLOAT_MAX);
CGSize textSize = [self.text sizeWithFont:self.font constrainedToSize:maxSize lineBreakMode:self.lineBreakMode];
CGRect labelRect = self.frame;
labelRect.size.height = textSize.height;
[self setFrame:labelRect];
}
and use it instead sizeToFit
Use [UILabel sizeThatFits:] with a CGSize with infinite height like (320, 10000).
I subclassed UILabel and overrode the sizeThatFits method to look like this:
- (CGSize)sizeThatFits:(CGSize)size
{
CGSize res = [super sizeThatFits:size];
return CGSizeMake(size.width, res.height);
}
Then if I add the label into a nib I place a UILabel from the object library. After that I make sure to set the class of the placed label to my custom class instead of the default of UILabel.
It basically just overrides the new width with the original width so it never changes width, but dynamically changes height.
Use following trick to do the job done:
First is set tag of uiLabel. My cell.yourLable tag is 998
cell.yourLable.numberOfLines = 0;
[cell.yourLable sizeToFit];
UILabel *myLbl=[cell.contentView viewWithTag:998];
CGRect frm=cell.yourLable.frame;
frm.size.width = cell.contentView.frame.size.width;
myLbl.frame=frm;
Here the trick is to get same UiLabel by tag and set its width by setting frame.
I have some code:
CGRect currentFrame = textLabel.frame;
CGSize max = CGSizeMake(textLabel.frame.size.width, 3000);
CGSize expected = [[textLabel text] sizeWithFont:textLabel.font constrainedToSize:max lineBreakMode:textLabel.lineBreakMode];
currentFrame.size.height = expected.height;
textLabel.frame = currentFrame;
expected.height = expected.height + 70;
[scrollView setContentSize:expected];
textLabel placed inside UIScrollView to display multiline text information.
In older version of application, without 4-inch screen support, everything was perfect.
But now, unfortunately, resizing UILabel does not work.
Maybe, somebody can advice me, what should I change?
Thanks.
When using AutoLayout you should not update the frame property, instead modify the contraints on a view.
On the other hand, you could also let AutoLayout work for you. Make sure the numberOfLines property of the label is set to 0 and the height constraint is of type Greater Than or Equal (>=). This way the layout will update automatically after setting new text on a label.
Is it possible to auto-resize the UILabel box/bounds to fit the contained text?
(I don't care if it ends up larger than the display)
So if a user enters "hello" or "my name is really long i want it to fit in this box", it is never truncated and the label is 'widened' accordingly?
Please check out my gist where I have made a category for UILabel for something very similar, my category lets a UILabel stretch it's height to show all the content: https://gist.github.com/1005520
Or check out this post: https://stackoverflow.com/a/7242981/662605
This would stretch the height, but you can change it around easily to work the other way and stretch the width with something like this, which is I believe what you want to do:
#implementation UILabel (dynamicSizeMeWidth)
- (void)resizeToStretch{
float width = [self expectedWidth];
CGRect newFrame = [self frame];
newFrame.size.width = width;
[self setFrame:newFrame];
}
- (float)expectedWidth{
[self setNumberOfLines:1];
CGSize maximumLabelSize = CGSizeMake(CGRectGetWidth(self.bounds), CGFLOAT_MAX);
CGSize expectedLabelSize = [[self text] sizeWithFont:[self font]
constrainedToSize:maximumLabelSize
lineBreakMode:[self lineBreakMode]];
return expectedLabelSize.width;
}
#end
You could more simply use the sizeToFit method available from the UIView class, but set the number of lines to 1 to be safe.
iOS 6 update
If you are using AutoLayout, then you have a built in solution. By setting the number of lines to 0, the framework will resize your label appropriately (adding more height) to fit your text.
iOS 8 update
sizeWithFont: is deprecated so use sizeWithAttributes: instead:
- (float)expectedWidth{
[self setNumberOfLines:1];
CGSize expectedLabelSize = [[self text] sizeWithAttributes:#{NSFontAttributeName:self.font}];
return expectedLabelSize.width;
}
Using [label sizeToFit]; will achieve the same result from Daniels Category.
Although I recommend to use autolayout and let the label resize itself based on constraints.
If we want that UILabel should shrink and expand based on text size then storyboard with autolayout is best option. Below are the steps to achieve this
Steps
Put UILabel in view controller and place it wherever you want. Also put 0 for numberOfLines property of UILabel.
Give it Top, Leading and Trailing space pin constraint.
Now it will give warning, Click on the yellow arrow.
Click on Update Frame and click on Fix Misplacement. Now this UILabel will shrink if text is less and expand if text is more.
This is not as complicated as some of the other answers make it.
Pin the left and top edges
Just use auto layout to add constraints to pin the left and top sides of the label.
After that it will automatically resize.
Notes
Don't add constraints for the width and height. Labels have an intrinsic size based on their text content.
Thanks to this answer for help with this.
No need to set sizeToFit when using auto layout. My complete code for the example project is here:
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var myLabel: UILabel!
#IBAction func changeTextButtonTapped(sender: UIButton) {
myLabel.text = "my name is really long i want it to fit in this box"
}
}
If you want your label to line wrap then set the number of lines to 0 in IB and add myLabel.preferredMaxLayoutWidth = 150 // or whatever in code. (I also pinned my button to the bottom of the label so that it would move down when the label height increased.)
If you are looking for dynamically sizing labels inside a UITableViewCell then see this answer.
Use [label sizeToFit]; to adjust the text in UILabel
Here's what I am finding works for my situation:
1) The height of the UILabel has a >= 0 constraint using autolayout. The width is fixed.
2) Assign the text into the UILabel, which already has a superview at that point (not sure how vital that is).
3) Then, do:
label.sizeToFit()
label.layoutIfNeeded()
The height of the label is now set appropriately.
I created some methods based Daniel's reply above.
-(CGFloat)heightForLabel:(UILabel *)label withText:(NSString *)text
{
CGSize maximumLabelSize = CGSizeMake(290, FLT_MAX);
CGSize expectedLabelSize = [text sizeWithFont:label.font
constrainedToSize:maximumLabelSize
lineBreakMode:label.lineBreakMode];
return expectedLabelSize.height;
}
-(void)resizeHeightToFitForLabel:(UILabel *)label
{
CGRect newFrame = label.frame;
newFrame.size.height = [self heightForLabel:label withText:label.text];
label.frame = newFrame;
}
-(void)resizeHeightToFitForLabel:(UILabel *)label withText:(NSString *)text
{
label.text = text;
[self resizeHeightToFitForLabel:label];
}
#implementation UILabel (UILabel_Auto)
- (void)adjustHeight {
if (self.text == nil) {
self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.bounds.size.width, 0);
return;
}
CGSize aSize = self.bounds.size;
CGSize tmpSize = CGRectInfinite.size;
tmpSize.width = aSize.width;
tmpSize = [self.text sizeWithFont:self.font constrainedToSize:tmpSize];
self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, aSize.width, tmpSize.height);
}
#end
This is category method. You must set text first, than call this method to adjust UILabel's height.
You can size your label according to text and other related controls using two ways-
For iOS 7.0 and above
CGSize labelTextSize = [labelText boundingRectWithSize:CGSizeMake(labelsWidth, MAXFLOAT)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:#{
NSFontAttributeName : labelFont
}
context:nil].size;
before iOS 7.0 this could be used to calculate label size
CGSize labelTextSize = [label.text sizeWithFont:label.font
constrainedToSize:CGSizeMake(label.frame.size.width, MAXFLOAT)
lineBreakMode:NSLineBreakByWordWrapping];
// reframe other controls based on labelTextHeight
CGFloat labelTextHeight = labelTextSize.height;
If you do not want to calculate the size of the label's text than you can use -sizeToFit on the instance of UILabel as-
[label setNumberOfLines:0]; // for multiline label
[label setText:#"label text to set"];
[label sizeToFit];// call this to fit size of the label according to text
// after this you can get the label frame to reframe other related controls
Add missing constraints in storyboard.
Select UILabel in storyboard and set the attributes "Line" to 0.
Ref Outlet the UILabel to Controller.h with id:label
Controller.m and add [label sizeToFit]; in viewDidLoad
the sizeToFit() method doesn't play well with constraints, but as of iOS 9 this is all you need -
label.widthAnchor.constraint(equalToConstant: label.intrinsicContentSize.width).activate()
I had a huge problems with auto layout.
We have two containers inside table cell. Second container is resized depending on Item description (0 - 1000 chars), and row should be resized based on them.
The missing ingredient was bottom constraint for description.
I've changed bottom constraint of dynamic element from = 0 to >= 0.
Fits everytime! :)
name.text = #"Hi this the text I want to fit to"
UIFont * font = 14.0f;
CGSize size = [name.text sizeWithAttributes:#{NSFontAttributeName: font}];
nameOfAssessment.frame = CGRectMake(400, 0, size.width, 44);
nameOfAssessment.font = [UIFont systemFontOfSize:font];
you can show one line output then set property Line=0 and show multiple line output then set property Line=1 and more
[self.yourLableName sizeToFit];
There's also this approach:
[self.myLabel changeTextWithAutoHeight:self.myStringToAssignToLabel width:180.0f];