从ImageView将图像上传到Web服务中

Question

我试图上传设备摄像头拍摄的图像，或者从设备库中选择，稍后使用ImageView在屏幕上显示图像，最后将其上传到Rest API。我已经有一个存储在Rest API中的默认图像，我的应用程序已经加载了这个图像，但是当我尝试更改图像时，我遇到了问题。

这是邮政API调用后我的代码，我的JSON数据：

let defaultServiceResponse = data["defaultServiceResponse"] as! NSDictionary 
      self.idResponse = defaultServiceResponse["idResponse"] as! Int 
      let loginModel = LoginModel() 

      if self.idResponse == 0 { 

       let userInfo = data["userInfo"] as! NSDictionary 
       loginModel.imageProfileUrl = userInfo["imageProfileUrl"] as! String 
       let url = URL(string: loginModel.imageProfileUrl) 
       let data = try? Data(contentsOf: url!) 
       self.userImage.image = UIImage(data: data!)! 

然后我在那里我要上传的图像的第二类：

class PhotoViewController: UIViewController, UIImagePickerControllerDelegate, 
UINavigationControllerDelegate { 

    @IBOutlet weak var imagePicked: UIImageView! 

@IBAction func openCameraButton(sender: AnyObject) { 
     if UIImagePickerController.isSourceTypeAvailable(.camera) { 
      let imagePicker = UIImagePickerController() 
      imagePicker.delegate = self 
      imagePicker.sourceType = .camera; 
      imagePicker.allowsEditing = false 
      self.present(imagePicker, animated: true, completion: nil) 
     } 
    } 

    @IBAction func openPhotoLibraryButton(sender: AnyObject) { 
     if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) { 
      let imagePicker = UIImagePickerController() 
      imagePicker.delegate = self 
      imagePicker.sourceType = .photoLibrary; 
      imagePicker.allowsEditing = true 
      self.present(imagePicker, animated: true, completion: nil) 
     } 
    } 

    private func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) { 
     let image = info[UIImagePickerControllerOriginalImage] as! UIImage 
     imagePicked.image = image 
     dismiss(animated:true, completion: nil) 
    } 

    @IBAction func saveButt(sender: AnyObject) { 
     let imageData = UIImageJPEGRepresentation(imagePicked.image!, 0.6) 
     let compressedJPGImage = UIImage(data: imageData!) 
     UIImageWriteToSavedPhotosAlbum(compressedJPGImage!, nil, nil, nil) 

     let alert = UIAlertView(title: "Wow", 
           message: "Your image has been saved to Photo Library!", 
           delegate: nil, 
           cancelButtonTitle: "Ok") 
     alert.show() 
    } 

当我点击openCamara按钮和openLibrary按钮时，它每次都会执行正确的功能，但是当我选择照片时（无论是来自相机还是图库），在ImageView中都不会显示任何内容，并且我收到的错误是：“创建未知类型的图像格式是错误 “ 而且我不会将图像发送回Rest API，因为我不知道该怎么做。

有人可以帮助我显示哪里的错误是不让我在ImageView上的屏幕上显示图片？

如果可行，有人可以告诉我将该图像返回到Rest API的最佳方法吗？

Answer 1

@Zita诺列加埃斯特拉达 这个代码将删除所有错误。

func isValidData(_ result: Result<Any>, completion: @escaping (_ : NSDictionary?, _ : Bool?, _ : NSError?) -> Void) { 
     self.getValidDict(result, completion: {(dict, error) in 
      var success = false 
      var errorNew = error 
      if dict != nil { 
       success = ((dict?["dataKey"] as AnyObject).boolValue)! 

       if !success { 
        errorNew = NSError(domain: "", code: 400, userInfo: [NSLocalizedDescriptionKey: dict?.value(forKey: "messageKey")! as Any]) 
       } 
      } 
      completion (dict, success, errorNew) 
     }) 
    } 

    func getValidDict(_ result: Result<Any>, completion: @escaping (_ : NSDictionary?, _ : NSError?) -> Void) { 
     var dict: NSDictionary! 
     let errorNew = result.error as NSError? 
     if let json = result.value { 
      dict = (json as AnyObject).value(forKey: "responseKey") as! NSDictionary 
     } 
     completion (dict, errorNew) 
    } 

Answer 2

使用Alamofire将图像上传到服务器。

试试这个代码：

func uploadImage { 

    uploadImage(image: image, completion: { (success, error) in 
        if success! { 

        } else { 

        } 
       }) 
}    


    func uploadImage(_ image: UIImage!, completion: @escaping (_ : Bool?, _: NSError?) -> Void) { 

     let parameters: Parameters = ["image": image] 

     Alamofire.upload(multipartFormData: { 
      multipartFormData in 

      // For Image 
      for (key, value) in parameters { 
       if value != nil { 
        if let imageData = UIImageJPEGRepresentation(value!, 0.5) { 
         multipartFormData.append(imageData, withName: key, fileName: "file.png", mimeType: "image/png") 
        } 
       } 
      } 
     }, to: "apiName", method: .post, encodingCompletion: { 
      encodingResult in 

      switch encodingResult { 
      case .success(let upload, _, _): 
       upload.response { 
        [weak self] response in 
        guard self != nil 
         else { 
          return 
        } 

        upload.responseJSON(completionHandler: { response in 

         self?.isValidData(response.result, completion: {(dict, success, error) in 
          completion (success, error) 
         }) 
        }) 
       } 
      case .failure(let encodingError): 
       print("error:\(encodingError)") 
       completion (false, encodingError as NSError?) 
      } 
     }) 
    }