删除特定的本地通知 [英] Delete a particular local notification

问题描述

我正在开发基于本地通知的iPhone闹钟应用程序。

I am developing an iPhone alarm app based on local notifications.

在删除闹钟时，相关的本地通知应该被取消。但是如何确定要取消本地通知数组中的哪个对象呢？

On deleting an alarm, the related local notification should get cancelled. But how can I determine exactly which object from the array of local notifications is to be cancelled?

我知道 [[UIApplication sharedApplication] cancelLocalNotification ：通知] 方法，但我怎么能得到这个'通知'来取消呢？

I am aware of [[UIApplication sharedApplication] cancelLocalNotification:notification] method but how can I get this 'notification' to cancel it?

推荐答案

你可以在本地通知的userinfo中保存密钥的唯一值。
获取所有本地通知，循环播放数组并删除特定通知。

You can save a unique value for key in your local notification's userinfo. Get all local notification, loop through the array and delete the particular notification.

代码如下，

OBJ-C：

UIApplication *app = [UIApplication sharedApplication];
NSArray *eventArray = [app scheduledLocalNotifications];
for (int i=0; i<[eventArray count]; i++)
{
    UILocalNotification* oneEvent = [eventArray objectAtIndex:i];
    NSDictionary *userInfoCurrent = oneEvent.userInfo;
    NSString *uid=[NSString stringWithFormat:@"%@",[userInfoCurrent valueForKey:@"uid"]];
    if ([uid isEqualToString:uidtodelete])
    {
        //Cancelling local notification
        [app cancelLocalNotification:oneEvent];
        break;
    }
}

SWIFT：

var app:UIApplication = UIApplication.sharedApplication()
for oneEvent in app.scheduledLocalNotifications {
    var notification = oneEvent as UILocalNotification
    let userInfoCurrent = notification.userInfo! as [String:AnyObject]
    let uid = userInfoCurrent["uid"]! as String
    if uid == uidtodelete {
        //Cancelling local notification
        app.cancelLocalNotification(notification)
        break;
    }
}

UserNotification：

如果您使用 UserNotification （iOS 10+），请点击此处步骤：

If you use UserNotification (iOS 10+), just follow this steps:

1. 创建UserNotification内容时，添加唯一的 identifier

使用 removePendingNotificationRequests（withIdentifiers :)

使用 removeDeliveredNotificati删除特定的已发送通知ons（withIdentifiers :)

欲了解更多信息， UNUserNotificationCenter

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