CATransaction: Layer Changes But Does Not Animate
- by macinjosh
I'm trying to animate part of UI in an iPad app when the user taps a button. I have this code in my action method. It works in the sense that the UI changes how I expect but it does not animate the changes. It simply immediately changes. I must be missing something:
- (IBAction)someAction:(id)sender {
UIViewController *aViewController = <# Get an existing UIViewController #>;
UIView *viewToAnimate = aViewController.view;
CALayer *layerToAnimate = viewToAnimate.layer;
[CATransaction begin];
[CATransaction setAnimationDuration:1.0f];
CATransform3D rotateTransform = CATransform3DMakeRotation(0.3, 0, 0, 1);
CATransform3D scaleTransform = CATransform3DMakeScale(0.10, 0.10, 0.10);
CATransform3D positionTransform = CATransform3DMakeTranslation(24, 423, 0);
CATransform3D combinedTransform = CATransform3DConcat(rotateTransform, scaleTransform);
combinedTransform = CATransform3DConcat(combinedTransform, positionTransform);
layerToAnimate.transform = combinedTransform;
[CATransaction commit];
// rest of method...
}
I've tried simplifying the animation to just change the opacity (for example) and it still will not animate. The opacity just changes instantly. That leads me to believe something is not setup properly.
Any clues would be helpful!
