如何检测iPhone上的屏幕锁定/解锁事件？

4 回答

• 23

  您可能需要在 AppDelegate 中实现以下方法：

  告诉代表该应用程序现在在后台 .

  - (void)applicationDidEnterBackground:(UIApplication *)application
  

  告诉代表该应用程序已变为活动状态 .

  - (void)applicationDidBecomeActive:(UIApplication *)application
  

  告诉代表该应用程序即将变为非活动状态 .

  - (void)applicationWillResignActive:(UIApplication *)application
  

  回复于 2024-04-20T02:12:00+08:00
• -2

  实际上我想要退出应用程序并锁定iPhone，过了一段时间我解锁iPhone，然后退出应用程序显示通知或提醒启动应用程序 .

  你不能在iPhone上这样做 .

  回复于 2024-04-20T02:12:00+08:00
• 3

  看看这个，我想检测锁定/解锁事件，我通过达尔文通知解决了它 . 您可以通过 "com.apple.springboard.lockcomplete" 检测设备被锁定时的事件 .

  //call back
  static void displayStatusChanged(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo)
  {
      // the "com.apple.springboard.lockcomplete" notification will always come after the "com.apple.springboard.lockstate" notification
  
      NSString *lockState = (NSString*)name;
      NSLog(@"Darwin notification NAME = %@",name);
  
      if([lockState isEqualToString:@"com.apple.springboard.lockcomplete"])
      {
          NSLog(@"DEVICE LOCKED");
      }
      else
      {
          NSLog(@"LOCK STATUS CHANGED");
      }   
  }
  
  
  -(void)registerforDeviceLockNotif
  {
      //Screen lock notifications
      CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
                                      NULL, // observer
                                      displayStatusChanged, // callback
                                      CFSTR("com.apple.springboard.lockcomplete"), // event name
                                      NULL, // object
                                      CFNotificationSuspensionBehaviorDeliverImmediately);
  
      CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
                                      NULL, // observer
                                      displayStatusChanged, // callback
                                      CFSTR("com.apple.springboard.lockstate"), // event name
                                      NULL, // object
                                      CFNotificationSuspensionBehaviorDeliverImmediately);  
  }
  

  回复于 2024-04-20T02:12:00+08:00
• 1

  从当前视图控制器中，您应该为UIApplicationDidEnterBackgroundNotification添加一个观察者，并在解除视图控制器时删除观察者 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didEnterBackground) name:UIApplicationDidEnterBackgroundNotification object:nil];

  回复于 2024-04-20T02:12:00+08:00