Xcode 使用日期选择器的本地通知

我正在为我的应用程序使用localNotifications。我有一个日期选择器，用户可以从中为通知选择日期和时间，我还有3个分段控件（每日、每周、每月）。我已经为localnotification及其工作进行了编码。但是分段控件不工作，如果一个人选择了两次，那么还有一个问题（下午1点）和第二（下午2点），然后通知在这两个时间显示，我不想。下面是代码

在appdelegate.swift中

    let types:UIUserNotificationType = UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound

    let myAlarmSetting:UIUserNotificationSettings = UIUserNotificationSettings(forTypes: types, categories: categories as Set<NSObject>)

    UIApplication.sharedApplication().registerUserNotificationSettings(myAlarmSetting)

---

这是因为您在计划新通知时没有取消旧通知，因此您可以始终向通知中添加信息，如下所示：

var notification = UILocalNotification()
...
notification.userInfo = ["UUID": "YOUR NOTIFICATION ID"]

func cancelLocalNotificationsWithUUID(uuid: String) {
    for item in UIApplication.sharedApplication().scheduledLocalNotifications {
        let notification = item as! UILocalNotification
        if let notificationUUID = notification.userInfo?["UUID"] as? String {
            if notificationUUID == uuid {
                UIApplication.sharedApplication().cancelLocalNotification(notification)
            }    
        }
    }
}

无论何时安排新通知，都应取消旧通知，如下所示：

var notification = UILocalNotification()
...
notification.userInfo = ["UUID": "YOUR NOTIFICATION ID"]

func cancelLocalNotificationsWithUUID(uuid: String) {
    for item in UIApplication.sharedApplication().scheduledLocalNotifications {
        let notification = item as! UILocalNotification
        if let notificationUUID = notification.userInfo?["UUID"] as? String {
            if notificationUUID == uuid {
                UIApplication.sharedApplication().cancelLocalNotification(notification)
            }    
        }
    }
}

以下是完整的代码：

func cancelLocalNotificationsWithUUID(uuid: String) {
    for item in UIApplication.sharedApplication().scheduledLocalNotifications {
        let notification = item as! UILocalNotification
        if let notificationUUID = notification.userInfo?["UUID"] as? String {
            if notificationUUID == uuid {
                UIApplication.sharedApplication().cancelLocalNotification(notification)
            }
        }
    }
}

@IBAction func NotificationButtonTapped(sender: AnyObject) {

    cancelLocalNotificationsWithUUID("NotificationID")

    var notifications:UILocalNotification = UILocalNotification()
    notifications.fireDate = datePicker.date
    notifications.timeZone = NSTimeZone.defaultTimeZone()
    notifications.applicationIconBadgeNumber = UIApplication.sharedApplication().applicationIconBadgeNumber + 1
    notifications.soundName = UILocalNotificationDefaultSoundName

    switch(frequencysegmentedcontrol.selectedSegmentIndex){
    case 0:
        notifications.repeatInterval = NSCalendarUnit.CalendarUnitDay
        break;
    case 1:
        notifications.repeatInterval = NSCalendarUnit.CalendarUnitWeekOfYear
        break;
    case 2:
        notifications.repeatInterval = NSCalendarUnit.CalendarUnitYear
        break;
    default:
        notifications.repeatInterval = NSCalendarUnit(0)
        break;
    }

    notifications.userInfo = ["UUID": "NotificationID"]

    notifications.alertBody = "quote of the day"
    notifications.category = "First_category"

    UIApplication.sharedApplication().scheduleLocalNotification(notifications)
}

func application(application: UIApplication, didReceiveLocalNotification notification: UILocalNotification) {
    application.applicationIconBadgeNumber = 0
}

---

谢谢你，我的代码中的notifications.repeatinterval=NSCalendarunit.Calendarunitday行中也有这样的内容，你能纠正一下吗？我应该在iAction中包含func cancellocalnotification…吗@Firas@shivam事实上，我不理解代码背后的目标，你应该在任何时候调用它来取消之前的notif是的，如果你只有一个通知，并且它应该在固定的基础上重复，那么你应该在你的操作中调用它，如果它有效，请接受答案。@shivam如果它有效，请接受答案，或者至少接受upvote。嘿，我是通知新手，所以我不知道在哪里发布此代码。我必须在我的IBAction中发布此代码吗@菲拉斯