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POWhy are animations on bounds of an UILabel only working when increasing the size?
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  1. POWhy are animations on bounds of an UILabel only working when increasing the size?
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    copied!<p>I noticed that when i change the bounds of an UILabel in an animation block it only works if i increase the size, when i decrease the size the UILabel just changes his size but doesn't animate. Replacing the UILabel with a plain UIView works as intended.</p> <p>Note: Changing the contentMode property of the UILabel to UIViewContentModeScaleToFill fixes this issue, but i still don't understand why it works when increasing the size without changing the contentMode property.</p> <pre><code>#import "FooView.h" @interface FooView () @property (strong, nonatomic) UILabel *label; @property (assign, nonatomic) BOOL resized; @end @implementation FooView - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { self.backgroundColor = [UIColor lightGrayColor]; self.label = [[UILabel alloc] initWithFrame:(CGRect){0, 0, frame.size}]; self.label.backgroundColor = [UIColor greenColor]; [self addSubview:self.label]; _resized = false; UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(changeSize)]; tapRecognizer.numberOfTapsRequired = 1; [self addGestureRecognizer:tapRecognizer]; } return self; } - (void)changeSize { [UIView animateWithDuration:0.8 delay:0.0 options:UIViewAnimationOptionCurveEaseIn animations:^{ CGRect bounds = self.label.bounds; if (self.resized) { bounds.size.height *= 2; bounds.size.width *= 2; } else { bounds.size.width /= 2; bounds.size.height /= 2; } self.label.bounds = bounds; } completion:^(BOOL finished) { self.resized = !self.resized; }]; } @end </code></pre>
 

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