ios - 带有Xcode，Swift3的iOS Rich Push通知但无法获取图像

Answer 1

参考：https ://www.pluralsight.com/guides/swift/creating-ios-rich-push-notifications

我已经这样做了，希望它对您可以将扩展名更改为.png的GIF图像有所帮助。

1. 确保 APNS 中的有效负载attachment-url即将用于图像。
2. 如果图像 url 从以下位置开始，请检查应用程序传输安全密钥http://...
3. 您的图像应低于~200px。对我来说，它不能超越（HIT 和 TRIAL）。

代码：

import UserNotifications
import SDWebImage

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)

        func failEarly() {
            contentHandler(request.content)
        }

        guard let content = (request.content.mutableCopy() as? UNMutableNotificationContent) else {
            return failEarly()
        }

        guard let attachmentURL = content.userInfo["attachment-url"] as? String else {
            return failEarly()
        }

        SDWebImageDownloader.shared().downloadImage(with: URL(string: attachmentURL)!,
                                                    options: SDWebImageDownloaderOptions.continueInBackground,
                                                    progress: nil) { (image, data, error, flag) in

            guard let attachment = UNNotificationAttachment.create(imageFileIdentifier: "image.gif",
                                                                    data: data! as NSData,
                                                                    options: nil) else { return failEarly() }
            content.attachments = [attachment]
            contentHandler(content.copy() as! UNNotificationContent)

            if let bestAttemptContent = self.bestAttemptContent {
                bestAttemptContent.title = "\(bestAttemptContent.title) [modified]"
                contentHandler(bestAttemptContent)
            }
        }
    }

    override func serviceExtensionTimeWillExpire() {
        if let contentHandler = contentHandler, let bestAttemptContent =  bestAttemptContent {
            contentHandler(bestAttemptContent)
        }
    }
}

extension UNNotificationAttachment {
    static func create(imageFileIdentifier: String, data: NSData, options: [NSObject : AnyObject]?) -> UNNotificationAttachment? {
        let fileManager = FileManager.default
        let tmpSubFolderName = ProcessInfo.processInfo.globallyUniqueString
        let tmpSubFolderURL = NSURL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(tmpSubFolderName, isDirectory: true)

        do {
            try fileManager.createDirectory(at: tmpSubFolderURL!, withIntermediateDirectories: true, attributes: nil)
            let fileURL = tmpSubFolderURL?.appendingPathComponent(imageFileIdentifier)

            try data.write(to: fileURL!, options: [])
            let imageAttachment = try UNNotificationAttachment(identifier: imageFileIdentifier, url: fileURL!, options: options)
            return imageAttachment
        } catch let error {
            print("error \(error)")
        }

        return nil
    }
}