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UIView animation grows / shrinks

I have a UILabel. I want to revitalize growth and contraction. While resizing, I need the bottom left corner to remain static, so that it always displays directly above the bottom toolbar. I use the following code to enlarge the shortcut:

[UIView animateWithDuration:kAnimationDuration delay:0.0 options:UIViewAnimationCurveEaseInOut 
                 animations:^{  
    CGFloat lblHeight = 42.0f;
    [label setFrame:CGRectMake(0.0, 
                CGRectGetMaxY(self.view.bounds) - kBottomBarHeight - lblHeight, 
                CGRectGetMaxX(self.view.bounds), 
                lblHeight)];                
} completion:^(BOOL finished) { }];

and I use the same logic to compress it, except that lblHeight is set to 17.0f

The view grows correctly, but when I try to compress it, the frame change animation is not animated. He peeks into a new size and then brightens up at a new place of origin / location. I need the frame change to be animated. Can anyone see what I'm doing wrong?

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2 answers

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+2

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