ios - WatchOS 动态通知不适用于 Xcode 11.1 及更高版本 - didReceive 未调用

Question

我正在尝试从 https://developer.apple.com/tutorials/swiftui/creating-a-watchos-app 获取 Apple Watch SwiftUI 通知教程。 。它可以在 Xcode 11.0 上运行，但在从 11.1 到 beta 11.3 的任何更新版本上都失败。

收到通知时，NotificationController 中的 didReceive 不会被触发。以下是NotificationController.swift 文件的代码:

import WatchKit
import SwiftUI
import UserNotifications

class NotificationController: WKUserNotificationHostingController<NotificationView> {
    var landmark: Landmark?
    var title: String?
    var message: String?

    let landmarkIndexKey = "landmarkIndex"

    override var body: NotificationView {
        NotificationView(title: title,
            message: message,
            landmark: landmark)
    }

    override func willActivate() {
        // This method is called when watch view controller is about to be visible to user
        super.willActivate()
    }

    override func didDeactivate() {
        // This method is called when watch view controller is no longer visible
        super.didDeactivate()
    }

    override func didReceive(_ notification: UNNotification) {
        let userData = UserData()

        let notificationData =
            notification.request.content.userInfo as? [String: Any]

        let aps = notificationData?["aps"] as? [String: Any]
        let alert = aps?["alert"] as? [String: Any]

        title = alert?["title"] as? String
        message = alert?["body"] as? String

        if let index = notificationData?[landmarkIndexKey] as? Int {
            landmark = userData.landmarks[index]
        }
    }
}

此外，这是 PushNotificationPayload.apns 的内容:

{
    "aps": {
        "alert": {
            "title": "Silver Salmon Creek",
            "body": "You are within 5 miles of Silver Salmon Creek."
        },
        "category": "LandmarkNear",
        "thread-id": "5280"
    },

    "landmarkIndex": 1
}

还有其他人遇到这个问题吗？

Answer 1

我在 Xcode 11.3 上遇到了同样的问题。它在我的代码中失败了，但在苹果完成的项目中却没有失败。仔细查看教程代码，其中的有效负载(部分):

    "alert": {
        "body": "You are within 5 miles of Silver Salmon Creek."
        "title": "Silver Salmon Creek",
    },

完成的项目中的有效负载是:

    "alert": {
        "title": "Silver Salmon Creek",
        "body": "You are within 5 miles of Silver Salmon Creek."
    },

他们颠倒了两条线。然而仔细观察，您会发现在他们的教程代码中，“body”行末尾缺少逗号。这会导致 JSON 解析失败(静默)并且不会生成警报。把逗号放进去就可以了。