按下主屏幕按钮时暂停Sprite Kit场景 [英] Pause Sprite Kit scene when home button is pressed

问题描述

我想知道当按下主页按钮时如何暂停我的Sprite Kit场景.

I was wondering how would i pause my sprite kit scene when home button is pressed.

我在这里找不到几个答案，并在这样的通知中心尝试过.

I found few answers here and tried it with notification center like this.

当我的场景加载时:

 [[NSNotificationCenter defaultCenter]
          addObserver:self
          selector:@selector(applicationDidEnterBackground)
          name:UIApplicationDidEnterBackgroundNotification
          object:nil];

然后在进入后台时调用的方法:

And then later the method that is called if enters to background:

 - (void) applicationDidEnterBackground{
     NSLog(@"Enter to background");
     self.scene.view.paused  =YES;
 }

这里的问题是我收到了NSLog消息，因此applicationDidEnterBackground方法被正确调用.但是问题在于，当我返回应用程序时，我的应用程序未处于暂停"模式.

Problem here is that i get the NSLog message so applicationDidEnterBackground method is being called properly. But problem is that when I return to application my app is not on "pause" mode.

所以我的暂停语句(self.scene.view.paused = YES;)没有被调用吗?

So my pause statement (self.scene.view.paused =YES;) is not being called?

如果我将确切的语句放在代码中的其他位置，或者如果我用此语句做一个暂停按钮，则暂停工作就可以了.

If I put exact statement somewhere else in code or if I make a pause button with this statement pause works just fine.

出什么问题了?为什么这不适用于通知中心?

What is the problem? Why this won't work with notification center?

推荐答案

iOS 8的Sprite套件在退出后台模式后会自动恢复游戏.它在调用applicationDidBecomeActive之后发生.此外，iOS 8的Sprite套件会在移动到后台时自动暂停游戏.

Sprite kit for iOS 8 automatically resumes your game after exiting background mode. It happens after applicationDidBecomeActive is called. Also, Sprite kit for iOS 8 automatically pauses your game when it moves to the background.

更新:以下是进入/退出Xcode 5和6的后台模式时skView.paused的状态.

Update: The following are the states of skView.paused when enter/exiting background mode for Xcode 5 and 6.

Xcode 6

部署目标是7.0、7.1 **，8.0和8.1

Deployment targets 7.0, 7.1**, 8.0, and 8.1

applicationWillResignActive = NO
applicationDidEnterBackground = YES
applicationWillEnterForeground = YES
applicationDidBecomeActive = YES

**当我在运行iOS 7.1的设备上运行时，状态均为否

** When I ran on a device running iOS 7.1, the states were all NO

Xcode 5

部署目标7.0和7.1

Deployment targets 7.0 and 7.1

applicationWillResignActive = NO
applicationDidEnterBackground = NO
applicationWillEnterForeground = NO
applicationDidBecomeActive = NO

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