vue锁屏或进入后台关闭背景音乐

Posted 2023-04-22

参考技术A 1.首先，参考 https://www.jianshu.com/p/813e491177a5
添加背景音乐
2.在mouted方法中加如下方法 在页面被挂起时停止播放，唤起时播放

其中musicStart 在data中定义。默认为false，changeMusicPlay方法如下：

iOS开发-检测程序在前台和后台锁屏解锁的状态

1、程序在前台判断是否锁屏或解锁。  判断方法：直接使用Darwin层的通知就可以。

#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,constvoid* object,CFDictionaryRef userInfo)

    

    NSString* lockstate = (__bridge NSString*)name;

    if ([lockstate isEqualToString:(__bridge  NSString*)NotificationLock])

        // 锁屏

        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、程序退后台判断是否锁屏或解锁。
判断方法： 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（慎重）；

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);