ios - cancelLocalNotification 不起作用

Question

我的应用程序中有大约 10 个本地通知(不在数组中)及其开关。我用了这段代码

    NSUserDefaults *defaultsB = [NSUserDefaults standardUserDefaults];
    UILocalNotification *notification = [[UILocalNotification alloc]init];

    if (switcher.on == 1) {

        NSCalendar *gregCalendar = [[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar];
        NSDateComponents *dateComponent = [gregCalendar components:NSYearCalendarUnit  | NSWeekCalendarUnit fromDate:[NSDate date]];

        [dateComponent setWeekday:1]; // For sunday
        [dateComponent setHour:[timeHClass.text integerValue]];
        [dateComponent setMinute:[timeMClass.text integerValue]];

        NSDate *fireDate = [gregCalendar dateFromComponents:dateComponent];


        [notification setAlertBody:textClass1.text];
        [notification setFireDate:fireDate];
        notification.soundName = @"bells.mp3";
        notification.repeatInterval = NSWeekCalendarUnit;
        [notification setTimeZone:[NSTimeZone defaultTimeZone]];
        [[UIApplication sharedApplication] scheduleLocalNotification:notification];


        [defaultsB setObject:@"ON" forKey:@"SwitchState"];
    }
    else  {

        UIApplication *app=[UIApplication sharedApplication];
        [app cancelLocalNotification:notification];



        [defaultsB setObject:@"OFF" forKey:@"SwitchState"];

    }

但是当我关闭通知时，通知仍然有效？？

我应该将通知保存在 NSUserDefaults 中而不仅仅是开关吗？？

如果是，怎么办？？

Answer 1

如果您想取消现有通知，您需要通过 [[UIApplication sharedApplication] scheduledLocalNotifications] 获取对它的引用，然后遍历这些通知并找到您想要的通知(可能使用唯一的您在创建期间为其提供的标识符)。

或者，如果您想取消所有通知替换:

[app cancelLocalNotification:notification];

与:

[app cancelAllLocalNotifications];