启动通知中心/控制中心时暂停 iOS 游戏 [英] Pausing iOS game when Notification Center/Control Center is launched

问题描述

我假设我的应用程序在发生此类事件时通过 NSNotificationCenter 发送通知.有谁知道这些是什么?

I’m assuming my app is sent notifications through NSNotificationCenter when these kind of events happen. Does anyone know what these are?

推荐答案

在我正在开发的应用程序中，我也需要处理这些事件，并使用以下两个通知来做到这一点:

In the app I'm working on I needed to handle these events as well and did so using the following two notifications:

UIApplicationWillResignActiveNotification >> 当通知中心或控制中心被打开时会触发此通知.

UIApplicationWillResignActiveNotification >> This notification is fired when the Notification Center or Control Center is brought up.

UIApplicationWillEnterForegroundNotification >> 关闭通知中心或控制中心时会触发此通知.

UIApplicationWillEnterForegroundNotification >> This notification is fired when the Notification Center or Control Center is dismissed.

这些事件自然可以从 AppDelegate 处理:

These events can naturally be handled from the AppDelegate:

- (void)applicationWillResignActive:(UIApplication *)application
{
    // Handle notification
}

- (void)applicationDidBecomeActive:(UIApplication *)application
{
    // Handle Notification
}

尽管取决于您的应用，在需要注意这一点的视图控制器中显式侦听这些事件可能会更容易:

Though depending on your app it will likely be easier to explicitly listen for these events in the View Controller(s) that needed to be aware of this:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appWillResignActive:) name:UIApplicationWillResignActiveNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appDidBecomeActive:) name:UIApplicationDidBecomeActiveNotification object:nil];

...并实现您的选择器:

... and implement your selectors:

- (void)appWillResignActive:(NSNotification *)notification
{
    // Handle notification
}

- (void)appDidBecomeActive:(NSNotification *)notification
{
    // Handle notification
}

最后，当你完成后，将自己作为观察者移除:

And lastly remove yourself as an observer when you're done:

- (void)viewWillDisappear:(BOOL)animated
{
    // Remove notifications
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationWillResignActiveNotification object:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidBecomeActiveNotification object:nil];

    [super viewWillDisappear:animated];
}

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