相关宏定义：
#define NotificationLock CFSTR("com.apple.springboard.lockcomplete")
#define NotificationChange CFSTR("com.apple.springboard.lockstate")
#define NotificationPwdUI CFSTR("com.apple.springboard.hasBlankedScreen")
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[self addScreenStatusObserve]; // 视频锁屏监听
/*
应用程序自身代理的方法直接写需求即可。方法如下：
／／ 进入前台
1. - (void)applicationWillEnterForeground:(UIApplication *)application
／／ 非活动状态，会在后台保持一段时间，再将程序杀死
2. - (void)applicationDidBecomeActive:(UIApplication *)application
*/
return YES;
}
- (void)addScreenStatusObserve {
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL, screenLockStateChanged, NotificationLock, NULL, CFNotificationSuspensionBehaviorDeliverImmediately);
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL, screenLockStateChanged, NotificationChange, NULL, CFNotificationSuspensionBehaviorDeliverImmediately);
}
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]) {
NSLog(@"locked.");
} else if ([lockstate isEqualToString:(__bridge NSString*)NotificationChange]) {
NSLog(@"lock state changed.");
}
}