@property (strong ,nonatomic)UIPercentDrivenInteractiveTransition *transitonContext;
在VC右滑动作触发事件中，处理转场动画进度
- (void)handlePanGesture:(UIScreenEdgePanGestureRecognizer *)pan
{
// NSLog(@"_____%zd-----%zd",self.navigationController.childViewControllers.count,self.navigationController.viewControllers.count);
// NSLog(@"----%@",NSStringFromCGPoint([pan translationInView:self.view]));
CGFloat progress = ABS([pan translationInView:self.view].x) / (self.view.bounds.size.width * 1.0);
progress = MIN(1.0, MAX(0.0, progress));
if (pan.state == UIGestureRecognizerStateBegan) {
// 创建过渡对象，弹出viewController
self.transitonContext = [[UIPercentDrivenInteractiveTransition alloc] init];
[self.navigationController popViewControllerAnimated:YES];
}else if (pan.state == UIGestureRecognizerStateChanged) {
// 更新 interactive transition 的进度
[self.transitonContext updateInteractiveTransition:progress];
}else if (pan.state == UIGestureRecognizerStateEnded || pan.state == UIGestureRecognizerStateCancelled) {
// 完成或者取消过渡
if (progress > 0.5) {
[self.transitonContext finishInteractiveTransition];
}
else {
[self.transitonContext cancelInteractiveTransition];
}
self.transitonContext = nil;
}
}
- (id<UIViewControllerInteractiveTransitioning>)navigationController:(UINavigationController *)navigationController interactionControllerForAnimationController:(id<UIViewControllerAnimatedTransitioning>)animationController{
if (self.transitonContext) {
return self.transitonContext;
}
else {
return nil;
}
}
最后就是实现自定的各种转场动画了，可以简单模仿系统的滑动切换转场,具体处理在下面VC实现的方法中，返回一个处理转场的实例即可
- (id<UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC
4、贴一个简单的动画处理类
@implementation RTLPushAnimation
- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext
{
return 0.5;
}
- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
{
UIViewController *fromVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
UIViewController *toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
UIView *container = transitionContext.containerView;
UIView *tmpV = [fromVC.view snapshotViewAfterScreenUpdates:YES];
[container addSubview:toVC.view];
toVC.view.transform = CGAffineTransformMakeTranslation(-toVC.view.bounds.size.width, 0);
[container addSubview:tmpV];
[UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
tmpV.transform = CGAffineTransformMakeTranslation(toVC.view.bounds.size.width, 0);
toVC.view.transform = CGAffineTransformIdentity;
} completion:^(BOOL finished) {
[tmpV removeFromSuperview];
[transitionContext completeTransition:YES];
}];
}
@end
@implementation RTLPopAnimation
- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext
{
return 0.5;
}
- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
{
UIViewController *fromVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
UIViewController *toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
UIView *container = transitionContext.containerView;
UIView *tmpV = [fromVC.view snapshotViewAfterScreenUpdates:YES];
[container addSubview:toVC.view];
toVC.view.transform = CGAffineTransformMakeTranslation(toVC.view.bounds.size.width, 0);
[container addSubview:tmpV];
[UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
tmpV.transform = CGAffineTransformMakeTranslation(-toVC.view.bounds.size.width, 0);
toVC.view.transform = CGAffineTransformIdentity;
} completion:^(BOOL finished) {
[tmpV removeFromSuperview];
toVC.view.transform = CGAffineTransformIdentity;
[transitionContext completeTransition:!transitionContext.transitionWasCancelled];
}];
}
@end
