带有向下滑动动画的自定义推送视图控制器

Question

我想自定义推送和弹出视图控制器，使用下拉/上拉动画，如下所示：

我尝试更改 y 位置，但它不起作用（根本不显示动画）。

  [self.navigationController pushViewController:nextController animated:NO];

  self.view.frame = CGRectMake(self.view.frame.origin.x,   self.view.frame.origin.y, self.view.frame.size.width, self.view.frame.size.height);
  [UIView animateWithDuration:0.6 animations:^{
   self.view.frame = CGRectMake(0, -self.view.frame.size.height, self.view.frame.size.width, self.view.frame.size.height);
} completion:nil];

有什么建议吗？
P/s：在这种情况下我必须使用推送视图控制器而不是presentViewController

更新：
我尝试像这样使用 UINavigationControllerDelegate：
PropertyViewController.h

@interface PropertyViewController : UIViewController <UINavigationControllerDelegate>{

}

PropertyViewController.m

 - (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
  NSLog(@"willShowViewController");
}
 - (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
NSLog(@"didShowViewController");
}

 -(id<UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC {
  
  // THIS METHOD IS NOT CALLED AT ALL
  NSLog(@"animationControllerForOperation");
  TLTransitionAnimator *animator = [TLTransitionAnimator new];
  animator.presenting = (operation == UINavigationControllerOperationPush);
   animator.duration = 0.5;
   return animator;
 }

 - (void)viewGallery{
   // PUSH VIEW CONTROLLER
   GalleryViewController* galleryController = [[GalleryViewController alloc] initWithNibName:@"GalleryViewController" bundle:nil]; 
   galleryController.navigationController.delegate = self; 
   [self.navigationController pushViewController:galleryController animated:YES];
 }

更新 2：
修复 PropertyViewController.m

中未使用此行调用的问题方法后

  self.navigationController.delegate = self;

我面临另一个问题。
push 时的向下滑动动画确实有效，但向上滑动无效。
这是我的自定义动画：

- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext {
UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
UIViewController* fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];

[[transitionContext containerView] addSubview:toViewController.view];
if (self.presenting) { // push
    fromViewController.view.transform = CGAffineTransformIdentity;
    toViewController.view.transform = CGAffineTransformMakeTranslation(0, toViewController.view.frame.size.height);
}else{ // pop
    fromViewController.view.transform = CGAffineTransformMakeTranslation(0, fromViewController.view.frame.size.height);
}

[UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
    if (self.presenting) { // push
        fromViewController.view.transform = CGAffineTransformMakeTranslation(0, toViewController.view.frame.size.height);
        toViewController.view.transform = CGAffineTransformMakeTranslation(0, toViewController.view.frame.size.height);
    } else { // pop
        fromViewController.view.transform = CGAffineTransformMakeTranslation(0, 0);
    }
} completion:^(BOOL finished) {
    toViewController.view.transform = CGAffineTransformIdentity;
    
    [transitionContext completeTransition:![transitionContext transitionWasCancelled]];
}];
}

问题2：
下拉动画只在第一次起作用，从第二次开始，布局呈现错误，我不知道为什么会发生这种情况。

我哪里错了？

Answer 1

你应该实现UIViewControllerAnimatedTransitioning。

1. 使您的FromViewController.m 符合UINavigationControllerDelegate。其他示例代码告诉您遵守UIViewControllerTransitioningDelegate，但前提是您呈现 ToViewController。

   @interface ViewController : UIViewController <UINavigationControllerDelegate>
   

2. 在FromViewController 的委托回调方法中返回您的自定义过渡动画对象：

   - (id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController
                                  animationControllerForOperation:(UINavigationControllerOperation)operation
                                               fromViewController:(UIViewController *)fromVC
                                                 toViewController:(UIViewController *)toVC {
       TransitionAnimator *animator = [TransitionAnimator new];
       animator.presenting = (operation == UINavigationControllerOperationPush);
       return animator;
   }
   

3. 创建您的自定义 TransitionAnimator 动画师类并粘贴这些示例方法：

   - (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext {
       return 0.5f;
   }
   
   - (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
   {
       UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
       UIViewController* fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
       [[transitionContext containerView] addSubview:toViewController.view];
   
       if (self.presenting) {
           toViewController.view.transform = CGAffineTransformMakeTranslation(0, toViewController.view.frame.size.height);
       }
   
       [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
           if (self.presenting) {
               toViewController.view.transform = CGAffineTransformIdentity;
           } else {
               fromViewController.view.transform = CGAffineTransformMakeTranslation(0, toViewController.view.frame.size.height);
           }
       } completion:^(BOOL finished) {
           [transitionContext completeTransition:![transitionContext transitionWasCancelled]];
       }];
   
   }
   

大部分实现都来自这里，我只是根据您的需要编辑了转换方法：https://stackoverflow.com/a/25026102/2242359

我仍然强烈建议阅读部分或全部这些指南：
http://www.teehanlax.com/blog/custom-uiviewcontroller-transitions/
http://www.objc.io/issue-5/view-controller-transitions.html
http://objectivetoast.com/2014/03/17/custom-transitions-on-ios/

Answer 2

试试这个：

UIViewController *yourViewController = [[UIViewController alloc]init];

[UIView  beginAnimations: @"Showinfo"context: nil];
[UIView setAnimationCurve: UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.75];
[self.navigationController pushViewController: yourViewController animated:NO];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.navigationController.view cache:NO];
[UIView commitAnimations];