取消本地通知无效 [英] Cancel local notification not working

问题描述

我花了一半的时间阅读所有如何取消本地通知的问题和答案。
毕竟，我提出了自己的解决方案，但显然它不起作用。
我有一个包含我所有预定通知的tableview ....

I've spent half of my day reading all "How to cancel a local notification" questions and answers. After all, I came up with my own solution but apparently it is not working. I have a tableview with all my scheduled notifications....

我H文件

@property (strong, nonatomic) UILocalNotification *theNotification;

然后在M档案中：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSArray *notificationArray = [[UIApplication sharedApplication] scheduledLocalNotifications];
    theNotification = [notificationArray objectAtIndex:indexPath.row];
    NSLog(@"Notification to cancel: %@", [theNotification description]); 
    // NSLOG Perfectly describes the notification to be cancelled. But then It will give me      "unrecognized selector"


    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Local Reminder"
                                                    message:@"Cancel local reminder ?"
                                                   delegate:self
                                          cancelButtonTitle:@"No"
                                          otherButtonTitles:@"Yes", nil];
    [alertView show];
    [alertView release];    
    [self.tableView deselectRowAtIndexPath:indexPath animated:YES];
}
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 0) {
        NSLog(@"Cancel");
    }else{ 
        NSLog(@"Ok");
        [[UIApplication sharedApplication] cancelLocalNotification:theNotification];
    }
}

如果我点击确定我会得到：
2012-02-04 03：34：48.806第三次测试[8921：207] - [__ NSCFType encodeWithCoder：]：无法识别的选择器发送到实例0x890ae90
程序收到信号SIGABRT。

If I click "Ok" I get: 2012-02-04 03:34:48.806 Third test[8921:207] -[__NSCFType encodeWithCoder:]: unrecognized selector sent to instance 0x890ae90 Program received signal "SIGABRT".

如果我能完全确定要取消的通知，为什么会给我这个？

If I can totally identify the notification to be cancelled why does it give me that ?

推荐答案

在我的应用程序中，我这样做：

In my app I did it like this:

- (IBAction)cancelLocalNotification:(id)sender 
{
    for (UILocalNotification *lNotification in [[UIApplication sharedApplication] scheduledLocalNotifications]) 
    {
        if ([[lNotification.userInfo valueForKey:@"FlightUniqueIDKey"] isEqualToString:flightNo]) 
        {
            [[UIApplication sharedApplication] cancelLocalNotification:lNotification];
        }
    }
}

当我安排本地通知时，我添加了一把钥匙。 FlightNo是通知的唯一ID。

And when I scheduled local notification, I added a key. FlightNo is a unique ID for notification.

NSDictionary *infoDict = [NSDictionary dictionaryWithObject:flightNo forKey:@"FlightUniqueIDKey"];

localNotif.userInfo = infoDict;

来自Nick Farina的注释：这仅适用于预定通知;您似乎无法取消通过 presentLocalNotificationNow 提供的通知：

Note from Nick Farina: this works for scheduled notifications only; you can't seem to cancel a notification presented via presentLocalNotificationNow:

这篇关于取消本地通知无效的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！