Question

我正在开发一个应用程序，我想让用户知道它是在后台模式下通过其中一个横幅打开，就像你使用Uber或Alarm Cycle时一样。我知道如果你使用位置它会添加它但我不想这样做（可能会被拒绝）。

有没有办法添加这个横幅？

Answer 1

<强> 1。打开AppDelegate.swift文件

<强> 2。在iOS上注册您的应用程序，以便能够在applicationDidFinishLaunchingWithOptions中发送用户通知

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    registerForNotifications()
    return true
}

func registerForNotifications() {
    // Register for notification: This will prompt for the user's consent to receive notifications from this app.
    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { (granted, error) in

    }
}

第3。填写您希望通知关闭的内容和时间，并将其另存为UNNotificationRequest。（我在添加通知后一秒钟就离开了。）

func createBackgroundNotificationRequest() -> UNNotificationRequest {
    let content = UNMutableNotificationContent()
    content.title = "Entered Background Mode"
    content.subtitle = "Just so you are aware."
    content.body = "We'll be waiting for you back in the app"

    let request = UNNotificationRequest(identifier: "BackgroundNotification", content: content, trigger: UNTimeIntervalNotificationTrigger(timeInterval: 1, repeats: false))

    return request
}

<强> 4。将请求添加到applicationDidEnterBackground状态内的UNUserNotificationCenter.current（）

func applicationDidEnterBackground(_ application: UIApplication) {

    let notificationRequest = createBackgroundNotificationRequest()
    UNUserNotificationCenter.current().add(notificationRequest, withCompletionHandler: nil)
}

Here's a demo project I made performing the task you want.

只需打开应用，授权通知，然后点击主页按钮，即可触发后台通知。

Swift - 当您的应用处于后台模式时，如何在屏幕上添加横幅？

1 个答案: