iPhone - UILocalNotification 作为警报

Question

即使我的 iPhone 应用程序处于后台，我如何使用 UILocalNotification 每天晚上 8 点显示我的闹钟？

Answer 1

将 fireDate 设置为晚上 8 点，将 repeatInterval 设置为 NSDayCalendarUnit 并使用 [[UIApplication sharedApplication] ScheduleLocalNotification: myNotification] 安排警报;

Answer 2

dasdom的答案是正确的。只是想补充一点，如果您的设备处于静音模式，闹钟不会发出声音。这是 Apple 对 UILocalNotification 的限制。

Answer 3

UILocalNotification *localNotification =[[UILocalNotification alloc]init];

 NSCalendar *calendar=[NSCalendar currentCalendar];
    [calendar setTimeZone:[NSTimeZone defaultTimeZone]];

    unsigned currentFlag=NSDayCalendarUnit|NSMonthCalendarUnit|NSYearCalendarUnit|NSWeekdayCalendarUnit;

    NSDateComponents *comp=[calendar components:currentFlag fromDate:[NSDate date]];

    comp.hour=8;
    comp.minute=0;
    comp.second=0;

    NSDate *date=[[calendar dateFromComponents:comp]dateByAddingTimeInterval:0];

    if (localNotification==nil) {
        return;
    }

    localNotification.fireDate=date;
    localNotification.timeZone=[NSTimeZone defaultTimeZone];
    localNotification.repeatCalendar=[NSCalendar currentCalendar];

    localNotification.alertBody=@"Good Morning dude..!";

    localNotification.alertAction=@"Snooze";

    localNotification.repeatInterval=NSDayCalendarUnit;

    localNotification.soundName=@"goodmorning.caf";

[[UIApplication sharedApplication]scheduleLocalNotification:localNotification];

我希望这能帮助你......！