Question

I have an view:

There is layout constraint between label1 and label2. Pressing on button adds text from text view to label1. After it label 1 is resized to fit text (sizeToFit is called). And after resizing it looks like constraints don’t work:

Does somebody has an idea how to make constraints work?

My coode:

@interface ViewController ()
{
    CGFloat _width;
}
@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
}

- (void) viewDidAppear:(BOOL)animated
{

    _width = self.l1.frame.size.width;
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (IBAction)addText:(id)sender {
    self.l1.text = [NSString stringWithFormat:@"%@ %@", self.l1.text, self.text.text];
    self.l1.frame = CGRectMake(self.l1.frame.origin.x, self.l1.frame.origin.y, _width, 0);
    [self.l1 sizeToFit];
}
@end

Answer 1

I’ve found the reason: height constraint was equal to 40 of label 1. When I change it to greater or equal , all other constraints work ok.