每日通知Swift 3

Question

我正在尝试弄清楚如何在每天的特定时间(比如上午8点)发送一次通知，而不需要用户输入，并且使用新的UNMutableNotificationContent而不是过时的UILocalNotification，并且不使用用户输入来触发它，而是使用一个时间。所有的解释都是旧的，不包括iOS10和swift 3。

到目前为止我所知道的。

ViewController.swift中的授权通知：

override func viewDidLoad() {

        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge], completionHandler: {didAllow, error in
        })
    }

Notification.swift

let localNotification = UNMutableNotificationContent()
//    localNotification.fireDate = dateFire
    localNotification.title = "title"
    localNotification.body = "body"
    localNotification.badge = 1
    localNotification.sound = UNNotificationSound.default()

我知道我必须在其他事情中设置一个触发器和请求，但我不确定如何让它工作。

Answer 1

你能看看这个教程吗-- Hacking with swift Notification center

您需要的是日期组件部分。

 func scheduleLocal() {
      let center = UNUserNotificationCenter.current()

    let localNotification = UNMutableNotificationContent()
    localNotification.title = "title"
    localNotification.body = "body"
    localNotification.badge = 1
    localNotification.sound = UNNotificationSound.default()

        var dateComponents = DateComponents()
        dateComponents.hour = 10
        dateComponents.minute = 30
        let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: true)

        let request = UNNotificationRequest(identifier: UUID().uuidString, content: localNotification, trigger: trigger)
        center.add(request)
    }

有关更多信息，请查看教程。它是用swift 3 iOS 10. Here's github repo编写的。

Answer 2

第一步：

import UserNotifications

并判断用户是否允许通知

UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) {
granted, error in
    if granted {
        // determine whether the user allows notification
    }
}

第二步：

创建通知

// 1. create notification's content
let content = UNMutableNotificationContent()
content.title = "Time Interval Notification"
content.body = "My first notification"

// 2. create trigger
//custom your time in here
var components = DateComponents.init()
components.hour = 8
let trigger = UNCalendarNotificationTrigger(dateMatching: components, repeats: false)

// 3. send request identifier
let requestIdentifier = "com.xxx.usernotification.myFirstNotification"

// 4. create send request
let request = UNNotificationRequest(identifier: requestIdentifier, content: content, trigger: trigger)

// add request to send center
UNUserNotificationCenter.current().add(request) { error in
    if error == nil {
        print("Time Interval Notification scheduled: \(requestIdentifier)")
    }
}

你可以在Apple Documentation上找到更多信息