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显示 UIAlertView 时可以收到消息吗

发布于 2024-11-19 08:35:18 字数 94 浏览 0 评论 0原文

我想在系统显示 UIAlertView 时收到消息，以便我可以暂停游戏。

有人知道如何弄清楚吗？

UIAlertView不是由我自己控制的。

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意中人 2024-11-26 08:35:18

系统警报通常显示在其自己的 UIWindow 中。为 UIWindowDidBecomeVisibleNotification 和 UIWindowDidBecomeHiddenNotification 通知安装处理程序，以分别跟踪 UIWindow 何时变得可见和隐藏：

 [[NSNotificationCenter defaultCenter] addObserver:self
                                          selector:@selector(aWindowBecameVisible:)
                                              name:UIWindowDidBecomeVisibleNotification
                                            object:nil];
 [[NSNotificationCenter defaultCenter] addObserver:self
                                          selector:@selector(aWindowBecameHidden:)
                                              name:UIWindowDidBecomeHiddenNotification
                                            object:nil];

在处理程序中，获取 UIWindow 从通知的 object 属性更改状态：

- (void)aWindowBecameVisible:(NSNotification *)notification
{
    UIWindow *theWindow = [notification object];
    NSLog(@"Window just shown: %@", theWindow);
}

- (void)aWindowBecameHidden:(NSNotification *)notification
{
    UIWindow *theWindow = [notification object];
    NSLog(@"Window just hidden: %@", theWindow);
}

最后，检查 theWindow 是否包含类型的子视图UIAlertView。

A system alert is normally displayed in its own UIWindow. Install handlers for the UIWindowDidBecomeVisibleNotification and UIWindowDidBecomeHiddenNotification notifications to track when a UIWindow becomes visible and hidden respectively:

 [[NSNotificationCenter defaultCenter] addObserver:self
                                          selector:@selector(aWindowBecameVisible:)
                                              name:UIWindowDidBecomeVisibleNotification
                                            object:nil];
 [[NSNotificationCenter defaultCenter] addObserver:self
                                          selector:@selector(aWindowBecameHidden:)
                                              name:UIWindowDidBecomeHiddenNotification
                                            object:nil];

In the handlers, grab the UIWindow that changes state from the object property of the notification:

- (void)aWindowBecameVisible:(NSNotification *)notification
{
    UIWindow *theWindow = [notification object];
    NSLog(@"Window just shown: %@", theWindow);
}

- (void)aWindowBecameHidden:(NSNotification *)notification
{
    UIWindow *theWindow = [notification object];
    NSLog(@"Window just hidden: %@", theWindow);
}

Finally, check that theWindow contains a subview of type UIAlertView.

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吻安 2024-11-26 08:35:18

应用程序委托的 applicationWillResignActive: 将在中断时调用。您可以在那里处理暂停，甚至可以收听 UIApplicationWillResignActiveNotification 在视图控制器中并在那里暂停游戏。

您可以查看这部分< iOS 应用程序指南的 /code>详细介绍了应用程序的生命周期和状态转换。

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最后的乘客 2024-11-26 08:35:18

如果您的 UIAlertView 来自第三方应用程序（而不是您的应用程序），那么您可以实现以下委托方法来暂停和恢复游戏。

暂停游戏

- (void)applicationWillResignActive:(UIApplication *)application {
}

恢复游戏

- (void)applicationDidBecomeActive:(UIApplication *)application {
}

例如，如果您收到电话或短信，您可以使用上面的委托来暂停/恢复游戏。

If your UIAlertView is from Third party app (not from your app) then you can implement below delegate methods to pause and resume game.

To Pause game

- (void)applicationWillResignActive:(UIApplication *)application {
}

To Resume game

- (void)applicationDidBecomeActive:(UIApplication *)application {
}

For example if you receive call or SMS you can use above delegate to pause/resume game.

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情话墙 2024-11-26 08:35:18

只要这样做：

- (void)applicationWillResignActive:(UIApplication *)application {
//pause
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
//resume
}

Just make this:

- (void)applicationWillResignActive:(UIApplication *)application {
//pause
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
//resume
}

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