Hi all,
I'm trying to use CATransition in my app to provide an animated slide
transition when swapping views. I don't want to permanently layer back my views
because they cause various glitches (no subpixel antialiasing, resize issues
when backed with a CATiledLayer, etc.) To get around this, I want to
temporarily layer back my view, run the animation, and then disable layer
backing after the animation completes. This is my code thus far:
CATransition *transition = [CATransition animation];
transition.type = kCATransitionPush;
transition.subtype = kCATransitionFromLeft;
transition.timingFunction = [CAMediaTimingFunction
functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
[parentView setWantsLayer:YES];
[CATransaction begin];
[CATransaction setCompletionBlock:^(void) {
[parentView setWantsLayer:NO];
}];
[parentView setAnimations:[NSDictionary dictionaryWithObject:transition
forKey:@"subviews"]];
[[parentView animator] replaceSubview:firstView with:secondView];
[CATransaction commit];
With this code, the animation doesn't run (the views just get swapped without
animation but the completion block is still called). The problem seems to be
the fact that I'm calling -setWantsLayer: immediately before the animation
begins. If I call this method in -awakeForNib, the animation will run. I'm
thinking that this might be some sort of runloop issue, but I have no idea what
I can do to work around this. I've tried moving my -setWantsLayer: call to
various places within the animation method but this has no effect.
Any help is greatly appreciated.
Thanks,
Indragie
--------
http://indragie.com _______________________________________________
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