关于ios：自定义Segue动画

Custom Segue Animation

我正在尝试使用自定义转场来执行一种缩放动画。
执行转换时，sourceViewController 变黑，然后发生缩放。

还尝试将 pushViewController: 设置为完成块，但根本不执行转换。

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– (void)perform {

UIViewController *sourceViewController = (UIViewController *) self.sourceViewController;
UIViewController *destinationViewController = (UIViewController *) self.destinationViewController;

[destinationViewController.view setTransform:CGAffineTransformMakeScale(0.5,0.5)];
[destinationViewController.view setAlpha:0.0];

[UIView animateWithDuration:0.5
delay:0.0
options:UIViewAnimationCurveEaseOut
animations:^{
[destinationViewController.view setTransform:CGAffineTransformMakeScale(1.0,1.0)];
[destinationViewController.view setAlpha:1.0];
[sourceViewController.navigationController pushViewController:destinationViewController animated:NO];
}
completion:^(BOOL finished){
}];

}

我做错了什么？

感觉很笨拙，但是您可以尝试在动画之前添加destinationViewController.view 作为子视图，然后在动画完成后将其删除并在没有动画的情况下将其推回。解决了过渡前的黑屏，但可能并不完美，这取决于你想用导航栏做什么，但可能更接近：

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[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];
}];

注意，从 iOS 7 开始，您将使用自定义过渡。有关详细信息，请参阅 WWDC 2013 使用视图控制器的自定义转换。

例如，如果尝试使用导航控制器进行自定义转换，第一个视图控制器会将自己指定为导航控制器的委托：

1	self.navigationController.delegate = self;

然后，它将分别为 push 和 pop 指定自定义动画：

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– (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];
}
}

然后你显然会实现这些动画师：

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@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

和

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@interface PopAnimator : NSObject <UIViewControllerAnimatedTransitioning>

@end

@implementation PopAnimator

– (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext
{
return 0.5;
}

[[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

原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/268697.html

关于ios：自定义Segue动画

Custom Segue Animation

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