iPhone - 从 UILocalNotification 获取剩余时间

发布于 2024-11-04 21:01:09 字数 610 浏览 4 评论 0原文

我想知道是否有办法从先前设置的本地通知中获取剩余时间。

假设我做了这样的事情：

    //Creating Notification
    UILocalNotification *localNotif = [[UILocalNotification alloc] init];
    localNotif.fireDate = someTime;
    localNotif.alertBody = @"Your parking time will expire in 10 mins";
    localNotif.alertAction = @"View";
    localNotif.soundName = UILocalNotificationDefaultSoundName;
    localNotif.applicationIconBadgeNumber = 1;

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

然后我完全关闭我的应用程序。我重新打开它，我想显示一些消息，说明通知启动还剩多少时间。

提前致谢。

原文

I want to know if there's a way to get the remaining time from a Local Notification previously set.

Let's say I make something like this:

    //Creating Notification
    UILocalNotification *localNotif = [[UILocalNotification alloc] init];
    localNotif.fireDate = someTime;
    localNotif.alertBody = @"Your parking time will expire in 10 mins";
    localNotif.alertAction = @"View";
    localNotif.soundName = UILocalNotificationDefaultSoundName;
    localNotif.applicationIconBadgeNumber = 1;

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

So then I fully close my app. I reopen it and I want to show some message saying how much time is left for the notification to launch.

Thanks in advance.

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九公里浅绿 2024-11-11 21:01:09

您应该能够使用 UIApplication ScheduledLocalNotifications 属性获取当前计划的通知的列表。也许得到这个并当时做一些数学？

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生来就爱笑 2024-11-11 21:01:09

当您调用以下方法时，如 [self timeRemaning];如果注册了任何通知，它会告诉您重命名需要多少秒。这仅适用于一个已注册的通知。

-(int)timeRemaning{
    NSArray *checkNotifications = [[UIApplication sharedApplication] scheduledLocalNotifications];
     if (![checkNotifications count] == 0) {
    UILocalNotification *localNotification = [checkNotifications objectAtIndex:0];
    NSString*   notifdate=[localNotification.fireDate description];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"YYYY-MM-dd HH:mm:ss ZZ"];
    NSCalendar *c = [NSCalendar currentCalendar];
    NSDate *d1 = [NSDate date];
    NSDate *d2 = [dateFormatter dateFromString:notifdate];
    NSDateComponents *components = [c components:NSSecondCalendarUnit fromDate:d1 toDate:d2 options:0];
    NSInteger diff = components.second;
         int temp = diff;
    return temp;

     }else{
         return 0;
     }
}

When you call the below method like [self timeRemaning]; it will give you how many seconds renaming if there is any notification registered. This will work only for one registered notification.

-(int)timeRemaning{
    NSArray *checkNotifications = [[UIApplication sharedApplication] scheduledLocalNotifications];
     if (![checkNotifications count] == 0) {
    UILocalNotification *localNotification = [checkNotifications objectAtIndex:0];
    NSString*   notifdate=[localNotification.fireDate description];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"YYYY-MM-dd HH:mm:ss ZZ"];
    NSCalendar *c = [NSCalendar currentCalendar];
    NSDate *d1 = [NSDate date];
    NSDate *d2 = [dateFormatter dateFromString:notifdate];
    NSDateComponents *components = [c components:NSSecondCalendarUnit fromDate:d1 toDate:d2 options:0];
    NSInteger diff = components.second;
         int temp = diff;
    return temp;

     }else{
         return 0;
     }
}

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