在dismissModalViewControllerAnimated之后调用presentModalViewController有问题

Question

我有代码

- (void)matchmakerViewController:(GKMatchmakerViewController *)viewController didFindMatch:(GKMatch *)match
{
    [menuViewController dismissModalViewControllerAnimated:YES];
    [GameKitWrapper getSingleton].match = match;
    match.delegate = [GameKitWrapper getSingleton].remotePlayer;
    [menuViewController presentModalViewController:avatarSelectionViewController
                                      animated:YES];
}

但我有一个问题，即解雇是有效但不是现在。当我更改dismissModalViewControllerAnimated：YES to dismissModalViewControllerAnimated：NO它工作但看起来不太好。

感谢任何帮助。

Answer 1

@adam有正确的想法，但你不想等待一些任意的延迟。这很脆弱，因为动画可能需要花费任何时间才能完成。您希望等待前一个视图控制器实际完成解雇。根据我的经验，最好的位置是你当前的视图控制器viewDidAppear:。这将在你的模态完全消失后调用。有关解决类似问题的示例代码，请参阅this question。

Answer 2

试着等一下......

- (void)matchmakerViewController:(GKMatchmakerViewController *)viewController didFindMatch:(GKMatch *)match
{
    [menuViewController dismissModalViewControllerAnimated:YES];
    [GameKitWrapper getSingleton].match = match;
    match.delegate = [GameKitWrapper getSingleton].remotePlayer;
    [self performSelector:@selector(presentModal) withObject:nil afterDelay:1.0];
}

- (void)presentModal {   
    [menuViewController presentModalViewController:avatarSelectionViewController
                                          animated:YES];
}

Answer 3

尝试致电：

[menuViewController dismissModalViewControllerAnimated:NO];

致电之前：

[menuViewController presentModalViewController:avatarSelectionViewController
                    animated:YES];