最近公司有个项目需要对锁屏进行监控以便进行一些操作，然后在更新新版本的时候，审核竟然被拒绝了。原因竟然是调用了 Apple 不允许使用的 锁屏API ，如下方法一；后来改成方法二，终于审核通过了。

如果不确定是哪个第三方使用了，这个可以cd 到项目根目录:

grep -R 'com.apple.springboard.lockcomplete' *

他会检索出来，哪使用了

锁屏监听

1. 方法一：

   • 导入头文件和宏定义

     //  AppDelegate.m
     
     
     #import <notify.h>
     
     
     
     #define NotificationLock CFSTR("com.apple.springboard.lockcomplete")
     
     
     #define NotificationChange CFSTR("com.apple.springboard.lockstate")
     
     
     #define NotificationPwdUI CFSTR("com.apple.springboard.hasBlankedScreen")
     
     
     #define LOCK_SCREEN_NOTIFY @"LockScreenNotify"
     

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   • 定义监听锁屏函数

     //  AppDelegate.m
     
     static void screenLockStateChanged(CFNotificationCenterRef center,
                                        void *observer,
                                        CFStringRef name,
                                        const void *object,
                                        CFDictionaryRef userInfo)
     {
         NSString *lockstate = (__bridge NSString *)name;
         if ([lockstate isEqualToString:(__bridge NSString *)NotificationLock])
         {
             // 发送锁屏通知
             [[NSNotificationCenter defaultCenter] postNotificationName:LOCK_SCREEN_NOTIFY
                                                                 object:nil];
             NSLog(@"Lock screen.");
         }
         else
         {
             // 此处监听到屏幕解锁事件（锁屏也会掉用此处一次，所有锁屏事件要在上面实现）
             NSLog(@"Lock state changed.");
         }
     }

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   • 添加监听函数

     - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
     {
        CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
                                         NULL,
                                         screenLockStateChanged,
                                         NotificationLock,
                                         NULL,
                                         CFNotificationSuspensionBehaviorDeliverImmediately);
         CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
                                         NULL,
                                         screenLockStateChanged,
                                         NotificationChange,
                                         NULL,
                                         CFNotificationSuspensionBehaviorDeliverImmediately);
     
     }

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   • 注意：该方法已被 Apple 禁止使用，上传的 App 审核会被拒绝！ 
     

2. 方法二： 
   

   • 实现 applicationProtectedDataWillBecomeUnavailable: 方法监听锁屏

   //  AppDelegate.m
   
   
   #define LOCK_SCREEN_NOTIFY @"LockScreenNotify"
   
   
   - (void)applicationProtectedDataWillBecomeUnavailable:(UIApplication *)application
   {
       [[NSNotificationCenter defaultCenter] postNotificationName:LOCK_SCREEN_NOTIFY
                                                           object:nil];
       NSLog(@"Lock screen.");
   }

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3. 实现 applicationProtectedDataDidBecomeAvailable: 方法监听解锁

   //  AppDelegate.m
   
   
   #define UN_LOCK_SCREEN_NOTIFY @"UnLockScreenNotify"
   
   
   - (void) applicationProtectedDataDidBecomeAvailable:(UIApplication *)application
   {
       [[NSNotificationCenter defaultCenter] postNotificationName:UN_LOCK_SCREEN_NOTIFY
                                                           object:nil];
       NSLog(@"UnLock screen.");
   }

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4. 官网 API 说明如下： 
   

   When the user locks the device, the system calls the app delegate’s applicationProtectedDataWillBecomeUnavailable: method. Data protection prevents unauthorized access to files while the device is locked. If your app references a protected file, you must remove that file reference and release any objects associated with the file when this method is called. When the user subsequently unlocks the device, you can reestablish your references to the data in the app delegate’s applicationProtectedDataDidBecomeAvailable: method.