Question

将视图控制器推到UINavigationController时，如何获得自定义转换（iOS7）？我尝试在TransitioningDelegate和我推动的控制器上同时设置UINavigationController 这些方法永远不会被调用。

我发现的所有示例在模态呈现时都使用自定义转换。

Answer 1

@rounak有正确的想法，但有时无需从github下载就可以准备好代码。

以下是我采取的步骤：

使FromViewController.m符合UINavigationControllerDelegate。其他示例代码告诉您符合UIViewControllerTransitioningDelegate，但仅当您呈现 ToViewController时才会这样。

@interface ViewController：UIViewController

在FromViewController的委托回调方法中返回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;
}

创建自定义动画制作者类并粘贴这些示例方法：

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

- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext     {
// Grab the from and to view controllers from the context
UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];

// Set our ending frame. We'll modify this later if we have to
CGRect endFrame = CGRectMake(80, 280, 160, 100);

if (self.presenting) {
    fromViewController.view.userInteractionEnabled = NO;

    [transitionContext.containerView addSubview:fromViewController.view];
    [transitionContext.containerView addSubview:toViewController.view];

    CGRect startFrame = endFrame;
    startFrame.origin.x += 320;

    toViewController.view.frame = startFrame;

    [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
        fromViewController.view.tintAdjustmentMode = UIViewTintAdjustmentModeDimmed;
        toViewController.view.frame = endFrame;
    } completion:^(BOOL finished) {
        [transitionContext completeTransition:YES];
    }];
}
else {
    toViewController.view.userInteractionEnabled = YES;

    [transitionContext.containerView addSubview:toViewController.view];
    [transitionContext.containerView addSubview:fromViewController.view];

    endFrame.origin.x += 320;

    [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
        toViewController.view.tintAdjustmentMode = UIViewTintAdjustmentModeAutomatic;
        fromViewController.view.frame = endFrame;
    } completion:^(BOOL finished) {
        [transitionContext completeTransition:YES];
    }];
}
}

基本上，动画师是做重物的对象。当然，您可以将UINavigationControllerDelegate作为一个单独的对象，但这取决于您的应用程序的架构师。

Answer 2

objc.io关于视图控制器转换的帖子专门用于推送和弹出视图控制器。 http://objc.io/issue-5/view-controller-transitions.html

我完全根据objc.io帖子完成了这个动画（http://i.imgur.com/1qEyMu3.gif）。

简而言之，你必须有一个实现UINavigationControllerDelegate和UIViewControllerAnimatedTransitioning的类，其中包含返回正确的动画师和执行动画所需的方法。

Answer 3

您可以查看我的演示项目，演示如何在UINavigationController中使用自定义过渡。请看https://github.com/Vaberer/BlurTransition。

Answer 4

编辑：刚刚意识到这可能无法回答你的问题。但它是另一种选择。

如果您正在使用故事板，则可以通过创建自定义segue来执行自定义转换。在属性检查器中，将segue类名称更改为自定义转换类，例如MySegue。然后创建MySegue类并实施-(void)perform方法来执行转换。

- (void) perform{
      UIViewController *source = self.sourceViewController;
      UIViewController *destination = self.destinationViewController;
      [UIView transitionFromView:source.view
                          toView:destination.view
                        duration:0.50f
                         options:UIViewAnimationOptionTransitionFlipFromTop
                      completion:nil];
}

如何在UINavigationController中使用UIViewControllerAnimatedTransitioning？

4 个答案: