Hot to get UILabel Width using AutoLayout?

Question

I might missing something very trivial here, but I can't figure out how to get the width of my UILabel. Note that is it being added programatically, and the it's size fits the text inside it (the text vary from 2 to 35 characters). It automatically fits the right width of it's content, but I need to get the width.

My code to add it to the screen:

    UILabel *textLabel = [[UILabel alloc] init];
    textLabel.text = textInputFromUser;
    textLabel.textColor = [UIColor whiteColor];
    textLabel.backgroundColor = [UIColor colorWithRed:40.0/255.0 green:40.0/255.0 blue:40.0/255.0 alpha:0.95];
    textLabel.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:textLabel];

Note that the following code (with "Bounds"/"Frame") always returns 0.00):

NSLog(@"textlabel width: %f", textLabel.bounds.size.width);

Have you tried `textLabel.frame.size.width`? – CaptJak Dec 15 '13 at 01:06 — CaptJak, Dec 15 '13 at 01:06
Yes, look 2nd code snippet – anthoprotic Dec 15 '13 at 01:14 — anthoprotic, Dec 15 '13 at 01:14

score 4 · Accepted Answer · answered Dec 16 '13 at 07:26

4

You can only find out the size after the first layout pass. So either wait for that or call

[textLabel layoutIfNeeded];

to layout it immediately. After that the frame should be set to the right value.

answered Dec 16 '13 at 07:26

felinira

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score 0 · Answer 2 · edited May 23 '17 at 10:29

0

Since no one else answered, I'll throw in my two cents…

I assume the reason you're unable to get the frame of the label is because the frame hasn't technically been instantiated; but nonetheless, maybe just getting the size of the content would be sufficient for your needs.

Here's a post explaining how to use boundingRectWithSize:options:attributes:context: to get the size of the text in your label: https://stackoverflow.com/a/18961502/2274694

edited May 23 '17 at 10:29

Community

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answered Dec 15 '13 at 03:33

Lyndsey Scott

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I can't it to work. I think I'll just do a calculation based on how many characters are in my UILabel. Not optimal but might work – anthoprotic Dec 15 '13 at 19:36

score 0 · Answer 3 · answered Dec 15 '13 at 03:43

0

Try initializing the label with a dummy frame like so:

UILabel *textLabel = [[UILabel alloc] initWithFrame:CGRectMake(0,0,1,1)];
textLabel.text = textInputFromUser;
[textLabel sizeToFit];

or you could try:

UILabel *textLabel = [[UILabel alloc] initWithString:textInputFromUser];

answered Dec 15 '13 at 03:43

JustAnotherCoder

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It still return 0.00 as frame's width unfortunately – anthoprotic Dec 15 '13 at 19:24

score 0 · Answer 4 · answered May 16 '22 at 23:26

for swift I had to add following code block to get correct width for UILabel:

    private var infoLabel = UILabel()
    infoLabel.translatesAutoresizingMaskIntoConstraints = false
    infoLabel.frame = .zero
    infoLabel.font = UIFont.boldSystemFont(ofSize: 14)
    infoLabel.numberOfLines = -1
    infoLabel.text = "infoText"
    infoLabel.sizeToFit()

to get correct width:

    let infoWidth = infoLabel.frame.size.width

I also added correct constraints to my label (which is infoLabel) according to design given to me.

Hot to get UILabel Width using AutoLayout?

4 Answers4