在一周中的特定日期重复本地通知(Swift 3 IOS 10) [英] Repeating local notifications for specific days of week (Swift 3 IOS 10)

问题描述

我正在尝试为一周中的特定日期(例如星期一、星期三等)安排本地通知，然后每周重复一次.这是设置通知的屏幕的外观:

I am trying to schedule local notifications for specific days of week (e.g. Monday, Wednesday and etc) and then repeat them weekly. This is how the screen for setting notifications looks:

用户可以选择通知时间和重复天数.

User can select time for the notification and repeating days.

我安排单个非重复通知的方法如下所示:

My method for scheduling single non repeating notification looks like this:

static func scheduleNotification(reminder: Reminder) {
    // Setup notification content.
    let content = UNMutableNotificationContent()
    
    //content.title = NSString.localizedUserNotificationString(forKey: "Reminder", arguments: nil)
    content.body = NSString.localizedUserNotificationString(forKey: reminder.reminderMessage, arguments: nil)
    content.sound = UNNotificationSound.default()
    
    
    // Configure the triger for specified time.
    // 
    let dateComponentes = reminder.dateComponents
    // TODO: Configure repeating alarm
    
    // For the testing purposes we will not repeat the reminder
    let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponentes, repeats: false)
    
    // Create the request object.
    let request = UNNotificationRequest(identifier: "(reminder.reminderId)", content: content, trigger: trigger)
    
    // Schedule the request.
    let notificationCenter = UNUserNotificationCenter.current()
    notificationCenter.add(request) { (error: Error?) in
        if let theError = error {
            print(theError.localizedDescription)
        }
    }
}

从 UIDatePicker 小部件中提取日期组件并存储在提醒类中:

The date components are extracted from UIDatePicker widget and stored in reminder class:

let date = reminderTimeDatePicker.date.addingTimeInterval(60 * 60 * 24 * 7)
let components = Calendar.current.dateComponents([.weekday, .hour, .minute], from: date)
...
reminder.dateComponents = components

我有一个数组 selectedDays[Int](作为提醒类的一个属性)来保存通知应该触发的星期几的信息.

I have an array selectedDays[Int] (as a property of reminder class) to hold info on days of week on which the notification should fire.

如何在一周中的特定日期安排通知以及如何每周重复一次?

How can I schedule notification on specific day of week and how to repeat it weekly?

即使是一条评论也会有帮助，在此先感谢您.

Even a single comment will be helpful, and thank you in advance.

推荐答案

您可以使用以下函数从选定的选择器值中获取日期:

You can use below function to get Date from selected picker value:

    //Create Date from picker selected value.
    func createDate(weekday: Int, hour: Int, minute: Int, year: Int)->Date{

        var components = DateComponents()
        components.hour = hour
        components.minute = minute
        components.year = year
        components.weekday = weekday // sunday = 1 ... saturday = 7
        components.weekdayOrdinal = 10
        components.timeZone = .current

        let calendar = Calendar(identifier: .gregorian)
        return calendar.date(from: components)!
    }

    //Schedule Notification with weekly bases.
    func scheduleNotification(at date: Date, body: String, titles:String) {

        let triggerWeekly = Calendar.current.dateComponents([.weekday,.hour,.minute,.second,], from: date)

        let trigger = UNCalendarNotificationTrigger(dateMatching: triggerWeekly, repeats: true)

        let content = UNMutableNotificationContent()
        content.title = titles
        content.body = body
        content.sound = UNNotificationSound.default()
        content.categoryIdentifier = "todoList"

        let request = UNNotificationRequest(identifier: "textNotification", content: content, trigger: trigger)

        UNUserNotificationCenter.current().delegate = self
        //UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
        UNUserNotificationCenter.current().add(request) {(error) in
            if let error = error {
                print("Uh oh! We had an error: (error)")
            }
        }
    }

从picker pass picker 获取值后，选择工作日为(星期日= 1，星期一= 2，星期二= 3，星期三= 4，星期四= 5，星期五= 6，星期六= 7)函数 func createDate(weekday: Int, hour: Int, minute: Int, year: Int) 以每周为基础获取通知触发日期，并在获取日期后调用函数 func scheduleNotification(at日期:日期，正文:字符串，标题:字符串) 用于安排通知.

After getting a value from picker pass picker hour, minute and year with selected week day as (Sunday = 1, Monday = 2, Tuesday = 3, Wednesday = 4, thursday = 5, Friday = 6, Saturday = 7) to function func createDate(weekday: Int, hour: Int, minute: Int, year: Int) to get notification fire date on weekly bases, and after getting date call function func scheduleNotification(at date: Date, body: String, titles:String) for schedule a notification.

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