Sembra incredibile, ma è possibile provare ad aggiungere destinationViewController.view come sottoview prima dell'animazione e, al termine dell'animazione, rimuoverlo e reinserirlo senza animazione. Risolve la schermata nera prima della transizione, ma forse non perfetta, a seconda di cosa si vuole fare con la barra di navigazione, ma forse più vicino:
[sourceViewController.view addSubview:destinationViewController.view];
[destinationViewController.view setFrame:sourceViewController.view.window.frame];
[destinationViewController.view setTransform:CGAffineTransformMakeScale(0.5,0.5)];
[destinationViewController.view setAlpha:1.0];
[UIView animateWithDuration:0.5
delay:0.0
options:UIViewAnimationCurveEaseOut
animations:^{
[destinationViewController.view setTransform:CGAffineTransformMakeScale(1.0,1.0)];
[destinationViewController.view setAlpha:1.0];
}
completion:^(BOOL finished){
[destinationViewController.view removeFromSuperview];
[sourceViewController.navigationController pushViewController:destinationViewController animated:NO];
}];
nota, iOS efficaci 7, è necessario utilizzare transizioni personalizzate . Per ulteriori informazioni, vedere WWDC 2013 Custom Transitions Using View Controllers.
Per esempio, se si cerca di fare una transizione personalizzato con controller di navigazione, il primo controller della vista sarebbe in sé specificare come delegato del controller di navigazione:
self.navigationController.delegate = self;
Poi, essa dovrà precisare gli animatori personalizzate per spingere e pop, rispettivamente:
- (id<UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController
animationControllerForOperation:(UINavigationControllerOperation)operation
fromViewController:(UIViewController *)fromVC
toViewController:(UIViewController *)toVC
{
if (operation == UINavigationControllerOperationPush) {
return [[PushAnimator alloc] init];
} else {
return [[PopAnimator alloc] init];
}
}
e allora si sarebbe, ovviamente, implementare queste animatori:
@interface PushAnimator : NSObject <UIViewControllerAnimatedTransitioning>
@end
@implementation PushAnimator
- (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext
{
return 0.5;
}
- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
{
UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
UIViewController* fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
[[transitionContext containerView] addSubview:toViewController.view];
toViewController.view.frame = fromViewController.view.frame;
toViewController.view.transform = CGAffineTransformMakeScale(0.5,0.5);
toViewController.view.alpha = 0.0;
[UIView animateWithDuration:[self transitionDuration:transitionContext] delay:0.0 options:0 animations:^{
toViewController.view.transform = CGAffineTransformIdentity;
toViewController.view.alpha = 1.0;
} completion:^(BOOL finished) {
[fromViewController.view removeFromSuperview];
[transitionContext completeTransition:![transitionContext transitionWasCancelled]];
}];
}
@end
e
@interface PopAnimator : NSObject <UIViewControllerAnimatedTransitioning>
@end
@implementation PopAnimator
- (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext
{
return 0.5;
}
- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
{
UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
UIViewController* fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
[[transitionContext containerView] insertSubview:toViewController.view belowSubview:fromViewController.view];
toViewController.view.frame = fromViewController.view.frame;
[UIView animateWithDuration:[self transitionDuration:transitionContext] delay:0.0 options:0 animations:^{
fromViewController.view.transform = CGAffineTransformMakeScale(0.5,0.5);
fromViewController.view.alpha = 0.0;
} completion:^(BOOL finished) {
[fromViewController.view removeFromSuperview];
[transitionContext completeTransition:![transitionContext transitionWasCancelled]];
}];
}
@end
grazie, funziona bene! – Nimrod7