ios how to autoresize uilabel's height when text is added OR deleted (and numberOfLines = 0)

Question

I have a UILabel that displays a user's "bio". I also have the user able to edit this text by having a uitextview pop up upon a user tap and then once the user is done adding or removing text from this uitextview, i say label.text = textview.text, so it updates the bio label's text.
However, I want a way of telling the label to fix it's height according to how much text was added or removed. Is there a way of doing this? Thank you in advance!

NathanF

score 4 · Accepted Answer · edited Mar 12 '13 at 21:25

CGRect labelFrame = label.frame;
labelFrame.size = [textview.text sizeWithFont:label.font
                            constrainedToSize:CGSizeMake(label.frame.size.width, CGFLOAT_MAX)
                                lineBreakMode:label.lineBreakMode];
label.frame = labelFrame;

This will resize the label (height) according to the new text (while respecting font and linebreakmode).

NOTE: UILineBreakMode has been deprecated as of 6.0. Use NSLineBreak instead.

Source

score 4 · Answer 2 · answered Jul 12 '12 at 17:12

4

call

[labelName sizeToFit];

after setting the new text. Also make sure you set word wrap or character wrap like so:

[labelName setLineBreakMode:UILineBreakModeWordWrap];

or

[labelName setLineBreakMode:UILineBreakModeCharacterWrap];

Let me know if you have any other questions!

answered Jul 12 '12 at 17:12

jacerate

456
3
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thank you. this totally works, but one of my criteria was keeping the same width. – Nathan Fraenkel Jul 13 '12 at 18:49

score 1 · Answer 3 · answered Nov 13 '13 at 07:51

1

This method "sizeWithFont" is deprecated in iOS 7 instead of this you can use the method below:

CGRect rect = [YourText boundingRectWithSize:CGSizeMake(labelWidth, CGFLOAT_MAX)
                                       options:NSStringDrawingUsesLineFragmentOrigin
                                       context:nil];
 NSLog(@"Height: %f",rect.size.height);

For more info look into: Apple's Documentation

answered Nov 13 '13 at 07:51

Prike

57
10

I get [__NSCFConstantString pointSize]: unrecognized selector sent to instance after using the above code – Deepak Thakur Nov 03 '14 at 13:14

score 0 · Answer 4 · edited May 23 '17 at 10:09

0

You can use [NSString sizeWithFont:...] to measure text for use in a label.

See also: How to get the size of a NSString

edited May 23 '17 at 10:09

Community

1
1

answered Jul 12 '12 at 17:02

Philippe Leybaert

168,566
31
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ios how to autoresize uilabel's height when text is added OR deleted (and numberOfLines = 0)

4 Answers4