I am trying to change the corner radius of a button (OpenNoteVisible.layer) in the following way:
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"cornerRadius"];
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
animation.fromValue = [NSNumber numberWithFloat:10.0f];
animation.toValue = [NSNumber numberWithFloat:0.0f];
animation.duration = 1.0;
[animation.layer setCornerRadius:140.0];
[OpenNoteVisible.layer addAnimation:animation forKey:@"cornerRadius"];
But this code gives an error at the line [animation.layer setCornerRadius:140.0]; I can't understand why. I have imported Quartz core framework.
You're setting the corner radius on the layer property of the animation object; this animation object doesn't have a layer property.
You need to set the corner radius on the layer of the thing you're animating, in this case OpenNoteVisible
. You also need to ensure the toValue
of the animation object matches the value you're setting on the layer, otherwise you'll get odd animations.
Your code should now be:
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"cornerRadius"];
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
animation.fromValue = [NSNumber numberWithFloat:10.0f];
animation.toValue = [NSNumber numberWithFloat:140.0f];
animation.duration = 1.0;
[OpenNoteVisible.layer setCornerRadius:140.0];
[OpenNoteVisible.layer addAnimation:animation forKey:@"cornerRadius"];
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