从右到左推送动画导致导航栏损坏

Question

我将我的UINavigationController 子类化以使用 UIRTLNavigationController.m 从右到左执行推送（非正常行为）我已在此问题的底部添加并收到以下警告：

 nested push animation can result in corrupted navigation bar
 Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.

我研究了这些错误，发现了一个阻止你接收它们的类：https://github.com/Plasma/BufferedNavigationController

我已将 BufferedNavigationController .h 和 .m 添加到我的项目中，将 BufferedNavigationController.h 中的行更改为： @interface BufferedNavigationController : UIRTLNavigationController 并将 BufferedNavigationController 设置为我在 IB 中的 UINavigationController 自定义子类。

视图仍在从右向左移动，在 BufferedNavigationController 内部调用方法，但我仍然收到有关嵌套的警告，并且 ..导航栏子视图树可能已损坏..

任何帮助将不胜感激。

UIRTLNavigationController.m：

#import "UIRTLNavigationController.h"


@implementation UIRTLNavigationController

- (id)initWithRootViewController:(UIViewController *)rootViewController
{
        self = [super initWithRootViewController:rootViewController];
        if (!self)
                return nil;
        return self;
}

- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
        NSLog(@"pushViewController");
        // Add the viewController and a fake controller without animation. Then pop the fake controller with animation.
        UIViewController *fakeController = [[[UIViewController alloc] init] autorelease];
        [super setViewControllers:[[self viewControllers] arrayByAddingObjectsFromArray:[NSArray arrayWithObjects:viewController, fakeController, nil]] animated:NO];
        [super popViewControllerAnimated:animated];
}

- (void)popViewControllerAnimatedStep2:(UIViewController *)viewController
{
        // Push the new top controller with animation
        [super pushViewController:viewController animated:YES];
        // Remove the view that should have been popped
        NSMutableArray *arr = [NSMutableArray arrayWithArray:[self viewControllers]];
        [arr removeObjectAtIndex:[[self viewControllers] count]-2];
        [super setViewControllers:[NSArray arrayWithArray:arr] animated:NO];
}

- (UIViewController *)popViewControllerAnimated:(BOOL)animated
{
        NSLog(@"popViewControllerAnimated");

        if (animated)
        {
                // Save the controller that should be on top after this pop operation
                UIViewController *newTopController = [[self viewControllers] objectAtIndex:[[self viewControllers] count]-2];
                // Remove it from the stack. Leave the view that should be popped on top
                NSMutableArray *arr = [NSMutableArray arrayWithArray:[self viewControllers]];
                [arr removeObjectAtIndex:[[self viewControllers] count]-2];
                [super setViewControllers:[NSArray arrayWithArray:arr] animated:NO];
                // Schedule the next step
                [self performSelector:@selector(popViewControllerAnimatedStep2:) withObject:newTopController afterDelay:0];
                return [arr objectAtIndex:[arr count]-1];
        }
        return [super popViewControllerAnimated:NO];
}

- (void)dealloc {
    [super dealloc];
}


@end

Answer 1

我不知道您是否创建自定义 UINavigationController 只是为了执行自定义转换，如果这样做，有一种更简单的方法可以做到这一点。像下面的代码

-(void)makeMyCustomAnimation {
      YourDestinationViewController *destinationController = [YourDestinationViewController 
                                                             alloc] initWithNib.....];//add the missing code fot ini

  CATransition* transition = [CATransition animation];
  transition.duration = .25; //you can change this value to fit your needs
  transition.timingFunction = [CAMediaTimingFunction functionWithName: 
                                           kCAMediaTimingFunctionEaseInEaseOut]; 
                                           //kCAMediaTimingFunctionLinear
                                           //kCAMediaTimingFunctionEaseIn
                                           //kCAMediaTimingFunctionEaseOut
                                           //kCAMediaTimingFunctionEaseInEaseOut
                                           //kCAMediaTimingFunctionDefault

   transition.type = kCATransitionPush; //kCATransitionMoveIn;
                                     //kCATransitionPush,  
                                     //kCATransitionReveal
                                     //kCATransitionFade

   transition.subtype = kCATransitionFromRight; 
                       //kCATransitionFromLeft,
                       //kCATransitionFromRight 
                       //kCATransitionFromTop, 
                      //kCATransitionFromBottom

[self.navigationController.view.layer addAnimation:transition
                                                            forKey:kCATransition];

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

}

您可以通过更改subtype 值来更改过渡的方向。（我可能设置了错误的子类型值，我一直在混合它们）

您也可以对pop-ing 视图控制器使用相同的方法。我

如果你想使用 segues 也可以使用它，只需创建一个自定义 segue 并通过添加前面的代码和一些附加内容来覆盖 -(void)perform 方法，你必须获得带有 [self sourceViewController]; 和 @987654327 的视图控制器@

Answer 2

对我来说，问题是一个接一个地推动控制器，这会导致一个接一个的过渡动画。这个链接帮助了我： https://github.com/Plasma/BufferedNavigationController/blob/master/BufferedNavigationController.m

我从这个堆栈溢出答案中得到它：iOS: popViewController unexpected behavior