objective-c - 每天在特定时间安排 UILocalNotification

Question

我正在使用下面的代码在特定时间安排本地通知。但是通知每分钟重复一次，而不是一天后重复一次。我是否错过了任何通知设置。我的时区是(亚洲/加尔各答 (IST) 偏移量 19800) 并使用 iPhone 4s。

- (void)applicationDidEnterBackground:(UIApplication *)application
{     
    NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar] ;
    NSDate *now = [NSDate date];
    NSDateComponents *components = [calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth |  NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute) fromDate:now]; 
    [components setHour:12];
    [components setMinute:00];

    UILocalNotification *notification = [[UILocalNotification alloc]init];
    notification.fireDate = [calendar dateFromComponents:components];
    [notification setAlertBody:@"U got notification!!!"];
    // notification.soundName = UILocalNotificationDefaultSoundName;
    [[UIApplication sharedApplication] scheduleLocalNotification:notification]; 
}

Answer 1

您应该指定repeatInterval。

- (void)applicationDidEnterBackground:(UIApplication *)application
{     
    NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar] ;
    NSDate *now = [NSDate date];
    NSDateComponents *components = [calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth |  NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute) fromDate:now]; 
    [components setHour:12];
    [components setMinute:00];

    UILocalNotification *notification = [[UILocalNotification alloc]init];
    notification.fireDate = [calendar dateFromComponents:components];
    notification.repeatInterval = NSDayCalendarUnit;
    [notification setAlertBody:@"U got notification!!!"];
    // notification.soundName = UILocalNotificationDefaultSoundName;
    [[UIApplication sharedApplication] scheduleLocalNotification:notification]; 
}