在前台的本地通知

在报警中，通知在后台正常工作如下：

UILocalNotification *notification1=[[UILocalNotification alloc]init]; notification1.fireDate=alramtime; notification1.alertBody=@"Training Time"; notification1.repeatInterval=NSDayCalendarUnit; notification1.soundName=@"Alarm.caf"; /////// previousnotif=[[NSUserDefaults standardUserDefaults]objectForKey:@"notif1"]; previous=[NSKeyedUnarchiver unarchiveObjectWithData:previousnotif]; NSLog(@"alarm %@",previous); if (previous!= NULL) { [[UIApplication sharedApplication]cancelLocalNotification:previous]; [[NSUserDefaults standardUserDefaults]removeObjectForKey:@"notif1"]; } NSData *alarm1=[NSKeyedArchiver archivedDataWithRootObject:notification1]; [notifdefaults setObject:alarm1 forKey:@"notif1"]; ///////// [[UIApplication sharedApplication] scheduleLocalNotification:notification1]; NSLog(@"new alarm %@",notification1); 

但是当我修改它在前台也玩如下：..它不工作..只有警报出现，但没有声音？

 -(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification { UIApplicationState state = [application applicationState]; if (state == UIApplicationStateActive) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"KNIP" message:notification.alertBody delegate:self cancelButtonTitle:@"Close" otherButtonTitles:nil]; [alert show]; } @end 

当我logging声音文件等通知属性..他们工作正常…但没有声音…

Answer 1

在前台你必须提供警报视图和播放声音，如果需要的话，通知将只是调用applicationDidReceiveLocalNotification 。 您可以使用AVAudioPlayer播放声音

  //Playing sound NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/%@", [[NSBundle mainBundle] resourcePath],notification.soundName]]; AVAudioPlayer *newAudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:NULL]; self.audioPlayer = newAudioPlayer; self.audioPlayer.numberOfLoops = -1; [self.audioPlayer play]; [newAudioPlayer release]; 

Answer 2

如果应用程序是最重要的，并且在系统发送通知时可见，则不显示警报，不显示图标，也不播放声音。 但是，应用程序：didReceiveLocalNotification：如果应用程序委托实现它，则会被调用。 UILocalNotification实例被传递给这个方法，委托可以检查它的属性，或者访问userInfo字典中的任何自定义数据。