小编use*_*504的帖子

在警报中,通知在后台工作正常如下:

    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);

但是当我修改它以便在前景中播放时如下:..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

当我记录声音文件等通知属性时......它们工作得很好......但是没有声音......