How to get label's height when text goes multiple lines

Question

I am creating a label programatically in a detail view on table cell click.aI am setting the text accordingly and set the label height for that. This is my code :

NSString *mytitleString = [discussionData valueForKey:@"Name"];
 CGSize size =  [mytitleString sizeWithFont:[UIFont systemFontOfSize:14.0]  constrainedToSize:CGSizeMake(500, CGFLOAT_MAX)];
 float lbltitleheight = size.height;
 lbltitle.text = mytitleString;

but the problem is i am not able to set the height of lable if it is multiple line. How do i achieve this?

ok,you add two statement ...... label_mission.lineBreakMode = UILineBreakModeWordWrap; label_mission.numberOfLines = 0; — hitesh, Aug 08 '13 at 10:16

score 2 · Answer 1 · answered Aug 08 '13 at 10:10

You could also use

label.numberOfLines = 0; // allows label to have as many lines as needed
label.text = @"some long text";
[label sizeToFit];
NSLog(@"Label's frame is: %@", NSStringFromCGRect(label.frame));

Where the size will be adjusted accordingly.

Or you simply have to increase the height of your UILabel Dynamically. The sizeWithFont constrainedToSize:lineBreakMode: is the method to use.

//Calculate the expected size based on the font and linebreak mode of your label
// FLT_MAX here simply means no constraint in height
CGSize maximumLabelSize = CGSizeMake(296, FLT_MAX);

CGSize expectedLabelSize = [yourString sizeWithFont:yourLabel.font constrainedToSize:maximumLabelSize lineBreakMode:yourLabel.lineBreakMode];   

//adjust the label the the new height.
CGRect newFrame = yourLabel.frame;
newFrame.size.height = expectedLabelSize.height;
yourLabel.frame = newFrame;

Mikhail · Accepted Answer · 2013-08-08T11:19:15.847

Why you can't set labels size? Did you try to set label as multiline:

NSString *mytitleString = [discussionData valueForKey:@"Name"];
CGSize size =  [mytitleString sizeWithFont:[UIFont systemFontOfSize:14.0]  
                         constrainedToSize:CGSizeMake(500, CGFLOAT_MAX) 
                             lineBreakMode:lbltitle.lineBreakMode];
lbltitle.frame = (CGRect){.oririn = lbltitle.frame.origin, .size = size};
lbltitle.numberOfLines = 0;
lbltitle.text = mytitleString;

I also recommend not use method sizeToFit, as when you will call this multiple times - label may become too narrow.

score 2 · Answer 3 · answered Aug 08 '13 at 10:17

2

please try this:

CGFloat height=[mytitleString sizeWithFont:[UIFont fontWithName:@"Arial" size:14] constrainedToSize:CGSizeMake(500, CGFLOAT_MAX) lineBreakMode:UILineBreakModeWordWrap].height;

hope this will help you.

answered Aug 08 '13 at 10:17

hpp

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Dharmbir Singh · Answer 4 · 2013-08-08T10:15:52.227

1

Your code is correct but you need to set numberOfLines is 0. Because it is 1 bydefault.

lbltitle.numberOfLines = 0;

edited Aug 08 '13 at 10:15

answered Aug 08 '13 at 10:05

Dharmbir Singh

17,485
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score 1 · Answer 5 · answered Aug 08 '13 at 10:05

1

You can try this

 lbltitle.text = mytitleString;
 lbltitle.numberOfLines=0;
    [lbltitle sizeToFit];

answered Aug 08 '13 at 10:05

Toseef Khilji

17,192
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score 1 · Answer 6 · answered Aug 08 '13 at 10:09

try this:

UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0.0, 0.0, 320.0, 34.0)];
[label setBackgroundColor:[UIColor clearColor]];
[label setNumberOfLines:0];
label.adjustsFontSizeToFitWidth = YES;
label.minimumFontSize = 10.0;
[label setTextColor:[UIColor blackColor]];
[label setFont:[UIFont fontWithName:@"YourFont" size:15]];
[label setTextAlignment:UITextAlignmentCenter];
[label setText:yourText];

score 1 · Answer 7 · answered Aug 08 '13 at 10:12

1

CGRect rect_mission = CGRectMake(0, stringSize.height + stringSize_award.height+ 190, 280, stringSize_mission.height+60);

answered Aug 08 '13 at 10:12

hitesh

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score 1 · Answer 8 · answered Aug 08 '13 at 10:17

1

Your code should work correctly. Try changing the numberOfLines for the label and set it to a max number which it can be extended.

answered Aug 08 '13 at 10:17

Shahin

865
6
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score 1 · Answer 9 · answered Aug 08 '13 at 10:22

1

    CGFloat height=[yourlable sizeWithFont:[UIFont fontWithName:@"Arial" size:31] constrainedToSize:CGSizeMake(yourlable.frame.size.width,1000) lineBreakMode:UILineBreakModeWordWrap].height;

and you get the dynamic height of label.

answered Aug 08 '13 at 10:22

PeterParker

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How to get label's height when text goes multiple lines

9 Answers9