锁屏ios上的本地通知答案

【问题标题】：Local Notification on locked screen ios锁屏ios上的本地通知
【发布时间】：2018-04-11 10:46:40
【问题描述】：

我想在 iOS 中屏幕锁定时发送本地通知。以下是我添加的代码。但是屏幕锁定时无法收到通知

let notification = UILocalNotification()
notification.alertAction = "Go back to App"
notification.alertBody = "Phone Found..!!"

notification.fireDate = NSDate(timeIntervalSinceNow: 1) as Date
UIApplication.shared.scheduleLocalNotification(notification)
notification.soundName = UILocalNotificationDefaultSoundName

请建议，我错过了什么。提前谢谢你。

【问题讨论】：

timeIntervalSinceNow: 1，您如何能够运行此代码并在一秒钟内锁定您的设备？尝试增加它，然后再试一次...可能在应用程序打开时被触发

标签： ios swift notifications localnotification

【解决方案1】：

您的代码有效，您必须增加时间间隔，UILocalNotification 不推荐使用UNUserNotificationCenter

UNUserNotificationCenter.current().requestAuthorization(options: [.alert])
    { (success, error) in
        if success {
            print("Permission Granted")
        } else {
            print("There was a problem!")
        }
    }


    let notification = UNMutableNotificationContent()
    notification.title = "title"
    notification.subtitle = "subtitle"
    notification.body = "the body."

    let notificationTrigger = UNTimeIntervalNotificationTrigger(timeInterval: 5, repeats: false)
    let request = UNNotificationRequest(identifier: "notification1", content: notification, trigger: notificationTrigger)

    UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)

【讨论】：

【解决方案2】：

您可以使用共享的 UNUserNotificationCenter 对象来安排本地通知。您需要将 Usernotifications 框架导入到您的 swift 文件中，然后您可以请求本地通知。

import UserNotifications

您需要在 AppDelegate 的 didFinishLaunchingWithOptions 中调用该函数

registerForLocalNotifications()

registerForLocalNotifications() 的定义

  func registerForLocalNotifications() {
    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) {
        (granted, error) in
        print("Permission granted: \(granted)")

        guard granted else {return}

        self.getNotificationSettings()
    }
}

func getNotificationSettings() {
    UNUserNotificationCenter.current().getNotificationSettings { (settings) in
        print("Notification settings: \(settings)")
        guard settings.authorizationStatus == .authorized else {return}

        // UIApplication.shared.registerForRemoteNotifications()
    }
}

然后您可以像这样创建通知内容和请求通知。

let content = UNMutableNotificationContent()
content.title = "Title of Notification"
content.body = "Body of Notification"
content.sound = UNNotificationSound.default()


let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 120, repeats: true)           


let request = UNNotificationRequest(identifier: "Identifier of notification", content: content, trigger: trigger)

UNUserNotificationCenter.current().add(request, withCompletionHandler: {(error) in
                    if let error = error {
                        print("SOMETHING WENT WRONG")
                    }
                })

【讨论】：