objective-c - 取消本地通知不起作用

Question

我花了半天时间阅读所有“如何取消本地通知”问题和答案。毕竟，我想出了自己的解决方案，但显然它不起作用。我有一个包含所有预定通知的表格 View ....

在我的H文件上

@property (strong, nonatomic) UILocalNotification *theNotification;

然后在M文件上:

- (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”。

如果我可以完全确定要取消的通知，为什么它会给我那个？

Answer 1

在我的应用程序中，我是这样做的:

- (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，我添加了一个 key 。 FlightNo 是通知的唯一 ID。

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

localNotif.userInfo = infoDict;

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