检测应用程序是否从锁定屏幕打开

Question

我正在创建一个显示监视器iBeacon区域的应用程序，这意味着当设备被锁定并在信标范围内时，我的应用程序图标会显示在底部的锁定屏幕上剩下。

有没有什么办法可以检测我的应用程序是否通过此锁屏图标启动，并运行一些代码？

Answer 1

当图标出现时，表示已输入信标区域。图标第一次出现时将调用CLLocationManager代表的didEnterRegion方法。

您可以在那里放置自定义代码来设置一个标志，指示出现的图标。

- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region { 
    _iconShown = YES; 
} 

然后，当你的应用程序来到前台，您可以检查此标志，看它是否被设置，并执行自定义逻辑：

- (void)applicationWillEnterForeground:(UIApplication *)application { 
    if (_iconShown) { 
     _iconShown = NO; 

     // Put custom logic here for launching from the icon 
    } 
} 

Answer 2

嗯，还存在另一种方式，你可以处理它，只是创建一个变量self.backgroundedToLockScreen像：

- (void)applicationWillEnterForeground:(UIApplication *)application { 
    if (self.backgroundedToLockScreen) { 
     ... // app was backgrounded to lock screen 
    } else { 
     ... // app was backgrounded on purpose by tapping the home button or switching apps. 
    } 
    self.backgroundedToLockScreen = NO; 
} 

和

- (void)applicationWillEnterForeground:(UIApplication *)application { 
    UIApplicationState state = [[UIApplication sharedApplication] applicationState]; 
    if (UIApplicationStateInactive == state || // detect if coming from locked screen (iOS 6) 
     self.backgroundedToLockScreen)   // detect if backgrounded to the locked screen (iOS 7) 
    { 
     ... // app is coming from or was backgrounded to lock screen 
    } else { 
     ... // app was backgrounded on purpose by tapping the home button or switching apps 
    } 
    self.backgroundedToLockScreen = NO; 
} 

希望这可能是对你有用。