这篇文章主要介绍了iOS如何监听手机锁屏状态,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。
iPhone的锁屏监测分为两种方式监听:
1. 程序在前台,这种比较简单。直接使用Darwin层的通知就可以了:
#import <notify.h> #define NotificationLock CFSTR("com.apple.springboard.lockcomplete") #define NotificationChange CFSTR("com.apple.springboard.lockstate") #define NotificationPwdUI CFSTR("com.apple.springboard.hasBlankedScreen") 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 { NSLog(@"lock state changed."); } } - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL, screenLockStateChanged, NotificationLock, NULL, CFNotificationSuspensionBehaviorDeliverImmediately); CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL, screenLockStateChanged, NotificationChange, NULL, CFNotificationSuspensionBehaviorDeliverImmediately); //setScreenStateCb(); return YES; }
2. 第二种是程序退后台后,这时再锁屏就收不到上面的那个通知了,需要另外一种方式, 以循环的方式一直来检测是否是锁屏状态,会消耗性能并可能被苹果挂起(有可能没作用);
static void setScreenStateCb() { uint64_t locked; __block int token = 0; notify_register_dispatch("com.apple.springboard.lockstate",&token,dispatch_get_main_queue(),^(int t){ }); notify_get_state(token, &locked); NSLog(@"%d",(int)locked); } - (void)applicationDidEnterBackground:(UIApplication *)application { while (YES) { setScreenStateCb(); sleep(1); } }
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