具有UIImage或远程URL的UNNotificationAttachment

1. 在tmp文件夹中创建目录
2. 将的

   NSData

   表示形式写入

   UIImage

   新创建的目录
3. 使用URL到tmp文件夹中的文件创建UNNotificationAttachment
4. 清理tmp文件夹

我写了一个扩展

UINotificationAttachment

extension UNNotificationAttachment {    static func create(identifier: String, image: UIImage, options: [NSObject : AnyObject]?) -> UNNotificationAttachment? {        let fileManager = FileManager.default        let tmpSubFolderName = ProcessInfo.processInfo.globallyUniqueString        let tmpSubFolderURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(tmpSubFolderName, isDirectory: true)        do { try fileManager.createDirectory(at: tmpSubFolderURL, withIntermediateDirectories: true, attributes: nil) let imageFileIdentifier = identifier+".png" let fileURL = tmpSubFolderURL.appendingPathComponent(imageFileIdentifier) let imageData = UIImage.pngData(image) try imageData()?.write(to: fileURL) let imageAttachment = try UNNotificationAttachment.init(identifier: imageFileIdentifier, url: fileURL, options: options) return imageAttachment        } catch { print("error " + error.localizedDescription)        }        return nil    }}

因此，

UNUserNotificationRequest

UNUserNotificationAttachment

UIImage

let identifier = ProcessInfo.processInfo.globallyUniqueStringlet content = UNMutableNotificationContent()content.title = "Hello"content.body = "World"if let attachment = UNNotificationAttachment.create(identifier: identifier, image: myImage, options: nil) {    // where myImage is any UIImage    content.attachments = [attachment] }let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 120.0, repeats: false)let request = UNNotificationRequest.init(identifier: identifier, content: content, trigger: trigger)UNUserNotificationCenter.current().add(request) { (error) in    // handle error}

这应该可行，因为

UNNotificationAttachment