使用UNNotificationServiceExtension进行富远程通知

Question

我试图在ios 10中实现丰富的远程通知，我已经实现了这段代码。接收通知后的控件将在这里运行，但我不知道如何下载图像并在通知中显示。提前谢谢。

class NotificationService: UNNotificationServiceExtension {

var contentHandler: ((UNNotificationContent) -> Void)?
var bestAttemptContent: UNMutableNotificationContent?

override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
    self.contentHandler = contentHandler
    bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)

    if let bestAttemptContent = bestAttemptContent {
        // Modify the notification content here...
        //print("title for image = \(bestAttemptContent.title)")
        bestAttemptContent.title = "\(bestAttemptContent.title) [modified]"

        contentHandler(bestAttemptContent)
    }

}



override func serviceExtensionTimeWillExpire() {
    // Called just before the extension will be terminated by the system.
    // Use this as an opportunity to deliver your "best attempt" at modified content, otherwise the original push payload will be used.
    if let contentHandler = contentHandler, let bestAttemptContent =  bestAttemptContent {
        contentHandler(bestAttemptContent)
    }
}

}

Answer 1

您将在您的notificationData中获得如下附件

"attachment-url": "https://yourimage.png"

这就是你可以使用它的方法

self.contentHandler = contentHandler
        bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)

        // Get the custom data from the notification payload
        if let notificationData = request.content.userInfo["data"] as? [String: String] {
            // Grab the attachment
            if let urlString = notificationData["attachment-url"], let fileUrl = URL(string: urlString) {
                // Download the attachment
                URLSession.shared.downloadTask(with: fileUrl) { (location, response, error) in
                    if let location = location {
                        // Move temporary file to remove .tmp extension
                        let tmpDirectory = NSTemporaryDirectory()
                        let tmpFile = "file://".appending(tmpDirectory).appending(fileUrl.lastPathComponent)
                        let tmpUrl = URL(string: tmpFile)!
                        try! FileManager.default.moveItem(at: location, to: tmpUrl)

                        // Add the attachment to the notification content
                        if let attachment = try? UNNotificationAttachment(identifier: "", url: tmpUrl) {
                            self.bestAttemptContent?.attachments = [attachment]
                        }
                    }
                    // Serve the notification content
                    self.contentHandler!(self.bestAttemptContent!)
                    }.resume()
            }
        }

引用自这里

Answer 2

终于起作用了。这里的问题是我必须补充

NSAppTransportSecurity

在扩展的plist中标记。添加此标记后，它开始显示图像。希望它能帮到别人。