iphone - iOS4如何重启 View Controller

Question

我希望重新启动 View Controller 。

我所做的是将当前 View Controller 从导航堆栈中弹出，并将 View Controller 的新实例插入堆栈。 然而，这是行不通的。当前 View Controller 从导航堆栈中弹出，但新实例不会推送到堆栈中。

这是我的代码片段:

[[self navigationController] popViewControllerAnimated:YES];

VideoPlayerViewController *videoPlayer = [[VideoPlayerViewController alloc] init];
[videoPlayer setMedia:media];

[[self navigationController] pushViewController:videoPlayer animated:YES];
[videoPlayer release];
videoPlayer = nil;

NSLog(@"Restarting view controller...");

知道可能出了什么问题吗？

Answer 1

根据您的代码，您似乎正在尝试弹出当前 View Controller ，然后立即重新推送它，并在两个方向上都有动画。我无法想象你为什么要这样做，但暂时把它放在一边，以下是让它发挥作用的方法。

首先，添加<UINavigationControllerDelegate>到你的@interface声明。然后:

- (void)repushViewController {
    self.navigationController.delegate = self;
    [[self navigationController] popViewControllerAnimated:YES];
}

- (void)navigationController:(UINavigationController *)navController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
    navController.delegate = nil;
    VideoPlayerViewController *videoPlayer = [[VideoPlayerViewController alloc] init];
    [videoPlayer setMedia:media];

    [navController pushViewController:videoPlayer animated:YES];

    [videoPlayer release];
}