how can I set UILabel width dynamically?

Question

I have a UILabel and its text is generated dynamically, so depending upon text, UILabel width increases from iOS6 to iOS8. Is there any solution for this? it is only working on iOS7 and in iOS6.0 boundingRectWithSize method is crashing, its say boundingRectWithSize method only for iOS7.0 and above.

float widthIs =[[tagsArray objectAtIndex:i] boundingRectWithSize:_tagsValue.frame.size options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:_tagsValue.font } context:nil].size.width;
_tagsValue.frame=CGRectMake(prevTag, 2, widthIs+20, 30);
prevTag+=widthIs+30;

Tell us how it's *NOT working* on iOS 6 and 8? Any screenshots? — Neeku, Jul 28 '14 at 12:00
`boundingRectWithSize` method is crashing in iOS 6 and its only working on above ios7 — falcon143, Jul 28 '14 at 12:03
This method will crash application when you run on device with IOS6. As boundingRectWithSize method introduced in IOS7. — Surjeet Singh, Jul 28 '14 at 12:03
Then edit your question and add the crash detail including the error/warning message. We can't guess. — Neeku, Jul 28 '14 at 12:05
Look this question, maybe help you: [Here][1] [1]: http://stackoverflow.com/questions/3527494/how-to-calculate-uilabel-width-based-on-text-length — DiegoDias, Jul 28 '14 at 12:39

score 1 · Answer 1 · answered Jul 28 '14 at 12:02

1

Use this, this will work on IOS6 & IOS7. But I am not sure about IOS8 as i haven't test it on IOS8.

float width = [LABEL_TEXT_STRING sizeWithFont:LABEL_FONT constrainedToSize:DEFAULT_SIZE_OF_LABEL lineBreakMode:LABEL.lineBreakMode].width;

answered Jul 28 '14 at 12:02

Surjeet Singh

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depreciated method use – Rajesh Jul 28 '14 at 12:12

score 1 · Accepted Answer · answered Jul 28 '14 at 12:17

you need to put a check for iOS6 and iOS7,

if([[[tagsArray objectAtIndex:i] respondsToSelector:@selector(boundingRectWithSize:options:attributes:context:)]){
    float widthIs =[[tagsArray objectAtIndex:i] boundingRectWithSize:_tagsValue.frame.size options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:_tagsValue.font } context:nil].size.width;
    _tagsValue.frame=CGRectMake(prevTag, 2, widthIs+20, 30);
    prevTag+=widthIs+30;
}
else{
    float widthIs = [[[tagsArray objectAtIndex:i] sizeWithFont:font constrainedToSize:(CGSize){CGFLOAT_MAX, CGFLOAT_MAX}];
}

score -1 · Answer 3 · answered Jul 28 '14 at 12:11

Use this method to get the Width
Pass your label as param

 - (CGFloat)getWidth:(UILabel *)label{

      CGSize sizeOfText = [label.text boundingRectWithSize: CGSizeMake(CGFLOAT_MAX, self.bounds.size.height)
                                                  options: (NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading)
                                               attributes: [NSDictionary dictionaryWithObject:label.font
                                                forKey:NSFontAttributeName]
                                                  context: nil].size;

    return sizeOfText.width; 

    }

Its only available for iOS7. – Manish Agrawal Jul 28 '14 at 12:13 — Manish Agrawal, Jul 28 '14 at 12:13

how can I set UILabel width dynamically?

3 Answers3