Animate the height of UILabel to 0 - ios

Question

I've got a UILabel and what I want to do is to smoothly change it's height to 0.
CGRect newFrame = self.label1.frame;
newFrame.size.height = 0;
[UIView animateWithDuration:1.0 animations:^{
self.label1.frame = newFrame;
}];
The problem is that the animation is jamming does some wierd things. I guess that the label is trying to resize and reposition it's text and that is why it does not work. I've tried like every possible combination of properties on the label but without success.

Answer 1

You could enclose your UILabel into another UIView, set the enclosing UIView autoresizesSubviews' property to NO and clipToBounds to YES, and then animate the height of the enclosing UIView...

Answer 2

Try with a transform. I dug this code out for you:
//[self setAnchorPoint:CGPointMake(0.5, 1.0) forView:self.label];
[UIView animateWithDuration:0.3
delay:0
options:UIViewAnimationCurveEaseInOut
animations:^{
//Scale the height to close to zero
//0.00001, because 0.0 behaves strange
self.label.transform = CGAffineTransformMakeScale(1, 0.00001);
}
completion:^(BOOL finished) {
self.label.hidden = YES;
}];
This will shrink it into the middle. If you want it to shrink to the top or bottom, you will need to set an anchor point. I also have some code for this too:
- (void) setAnchorPoint:(CGPoint)anchorPoint forView:(UIView *)view {
CGPoint newPoint = CGPointMake(view.bounds.size.width * anchorPoint.x, view.bounds.size.height * anchorPoint.y);
CGPoint oldPoint = CGPointMake(view.bounds.size.width * view.layer.anchorPoint.x, view.bounds.size.height * view.layer.anchorPoint.y);
newPoint = CGPointApplyAffineTransform(newPoint, view.transform);
oldPoint = CGPointApplyAffineTransform(oldPoint, view.transform);
CGPoint position = view.layer.position;
position.x -= oldPoint.x;
position.x += newPoint.x;
position.y -= oldPoint.y;
position.y += newPoint.y;
view.layer.position = position;
view.layer.anchorPoint = anchorPoint;
}