Iphone UILocalnotification未在设置的时间获得警报？

我这样做是为了在规定时间内保持警惕。但它没有及时发出警报。我正在从datepicker设置时间。我怎样才能解决这个问题

- (void)scheduleNotificationWithInterval:(int)minutesBefore {

      [[UIApplication sharedApplication] cancelAllLocalNotifications];

      UILocalNotification *localNotif = [[UILocalNotification alloc] init];
      if (localNotif == nil)
          return;
      NSLog(@"Date %@",datePicker.date);
      localNotif.fireDate = datePicker.date;
      localNotif.timeZone = [NSTimeZone defaultTimeZone];
      if ([freq isEqualToString:@"Daily"]) {
          localNotif.repeatInterval = NSDayCalendarUnit;
      }

      localNotif.alertBody = @"Radio Asia Alarm";
      localNotif.alertAction = @"Ok";

      localNotif.soundName = UILocalNotificationDefaultSoundName;

      NSDictionary *infoDict = [NSDictionary dictionaryWithObject:@"Radio Asia Alarm" forKey:@"Message"];
      localNotif.userInfo = infoDict;

      [[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
      [localNotif release];
}

我还调用这个方法，在设置的时间和日期之后单击按钮

  [self scheduleNotificationWithInterval:1]; 

---

我没有警觉。我能做什么？

您确定设置了正确的时区吗？我相信问题可能就在那里

---

您是否尝试过不设置它？

检查datePicker.date Strings的日期格式尝试在设置后记录firedate Ager