区分应用程序启动和应用程序唤醒

Question

我需要能够区分应用程序didFinishLaunching和应用程序进入后台并加载回前台。我注意到如果我注册UIApplicationDidBecomeActiveNotification，它会在两个实例中被调用。我如何区分这两者？

Answer 1

使用didFinishLaunchingWithOptions vs applicationWillEnterForeground来区分app是冷启动还是从后台返回。

我尝试在我的某个应用中收听UINotification，但通知传送的时间太晚，所以我直接倾听这些方法调用。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // only call when app is freshly launched
}

- (void)applicationWillEnterForeground:(UIApplication *)application
{
    // Only called when app is returning from background
}

Answer 2

  

我需要能够区分应用程序   didFinishLaunching

UIApplicationDidFinishLaunchingNotification

  

申请进入背景

UIApplicationDidEnterBackgroundNotification

  

被加载回前景

UIApplicationWillEnterForegroundNotification