iphone - 区分应用启动和应用唤醒

Question

我需要能够区分应用程序 didFinishLaunching 和应用程序进入后台并重新加载到前台。我注意到如果我注册 UIApplicationDidBecomeActiveNotification，它会在两个实例中被调用。我如何区分两者？

Answer 1

使用 didFinishLaunchingWithOptions 与 applicationWillEnterForeground 区分应用是冷启动还是从后台返回。

我尝试在我的一个应用程序中监听 UINotification，但通知传递得太晚了，所以我求助于直接监听这些方法调用。

- (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
}