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這篇文章主要介紹了iOS如何監聽手機鎖屏狀態,具有一定借鑒價值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
iPhone的鎖屏監測分為兩種方式監聽:
1. 程序在前臺,這種比較簡單。直接使用Darwin層的通知就可以了:
#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. 第二種是程序退后臺后,這時再鎖屏就收不到上面的那個通知了,需要另外一種方式, 以循環的方式一直來檢測是否是鎖屏狀態,會消耗性能并可能被蘋果掛起(有可能沒作用);
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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