如何使用Backendless上传图片？

Question

我正在使用 Backendless 开发 Swift 3.0。我对这个概念很陌生。我正在上传一张使用

UIImagePickerController

从手机图库中选择的图像。在 Backendless 中，我使用 Rest API。我使用以下代码上传图像：

public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    let image = info[UIImagePickerControllerOriginalImage] as? UIImage
     self.uploadButton.isHidden = true
     myImageView.contentMode = .scaleAspectFit
     myImageView.image = image
        
     let imageUrl          = info[UIImagePickerControllerReferenceURL] as! NSURL
     let imageName         = imageUrl.lastPathComponent
     let documentDirectory = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!
     let photoURL          = NSURL(fileURLWithPath: documentDirectory)
     let localPath         = photoURL.appendingPathComponent(imageName!)
        
     print(localPath!)
           
     let imageurl = info[UIImagePickerControllerReferenceURL] as? NSURL
     let imagename = imageurl?.lastPathComponent
     print(imagename!)
        
     //https://api.backendless.com/<application id>/<version name>/files/<path>/<file name>
     Alamofire.request(“https://api.backendless.com/66B90F83-A813-84CF-FF9D-4A01AC28E100/v1/files/ + "\(localPath!)/\(imagename!)", method: .post, parameters: nil, encoding: JSONEncoding.default, headers: HeadersClass.allHeaders.headers).responseJSON { response in
         debugPrint(response)
     }

     imagePicker.dismiss(animated: true, completion: nil)  
}

但我收到“状态代码错误 = 400”。

谁能告诉我我在这里犯了什么错误？

Answer 1

你从第一步就完全错了。 您发出的请求网址是当您成功上传文件时后端服务将返回给您的返回网址。

关于backendless服务，https://backendless.com/documentation/files/ios/files_file_upload.htm，您需要实现下面列出的功能：

// Upload data block identified as 'content' to the specified path.
// If the server returns an error, it is delivered through
// the 'responder' object
func upload(_ path: String,
            content content: NSData,
            responder responder: IResponder!) -> Void

// Upload data block identified as 'content' to the specified path.
// If the file already exists on the server, overwrite if the
// 'overwrite' argument is set to YES/TRUE.
// If the server returns an error, it is delivered through
// the 'responder' object
func upload(_ path: String,
            content content: NSData,
            overwrite overwrite: Bool,
            responder responder: IResponder!) -> Void

// Upload data block identified as 'content' to the specified path.
// If the server returns an error, it is delivered through
// the 'error' block-based callback
func upload(_ path: String,
            content content: NSData,
            response responseBlock: ((BackendlessFile!) -> Void)!,
            error errorBlock: ((Fault!) -> Void)!) -> Void

// Upload data block identified as 'content' to the specified path.
// If the file already exists on the server, overwrite if the
// 'overwrite' argument is set to YES/TRUE.
// If the server returns an error, it is delivered through
// the 'error' block-based callback
func upload(_ path: String,
            content content: NSData,
            overwrite overwrite: Bool,
            response responseBlock: ((BackendlessFile!) -> Void)!,
            error errorBlock: ((Fault!) -> Void)!) -> Void

更详细的信息，您可以阅读他们的文档。