從應用程序上傳圖像文件Swift

Question

我想將圖像文件上傳到我的服務器。屏幕下方顯示通過郵遞員打電話。

隨着KEY：「圖像」和值：英揚留學[圖像文件]在形狀數據本體。

我想用迅速來實現我的應用程序相同。我嘗試了不同的解決方案，但力求找到合適的解決方案

我的選擇圖像與UIImagePicker的幫助：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) 
      { 
       let image = info[UIImagePickerControllerOriginalImage] as? UIImage 
       self.dismiss(animated: true, completion: nil) 
       uploadImage(image: image!, url: "profile_image/") 
      } 

我打電話uploadImage功能上傳圖片。

func uploadImage(image: UIImage, url: String) { 
     let urlString = "http://example.com/path/"+url 
     guard let url = URL(string: urlString) else { return } 
     let request = NSMutableURLRequest(url: url) 
     request.httpMethod = "POST" 
     let token = UserDefaults.standard.object(forKey: "token") as? String 
     request.addValue("Token "+token!, forHTTPHeaderField: "Authorization") 
     let imageData = UIImagePNGRepresentation(image)!.base64EncodedData() 
     //let postString = "image=\(imageData))" 
     //request.httpBody = postString.data(using: .utf8) 

    let imgDict = ["image": imageData] 

    do { 
     let jsonBody = try JSONEncoder().encode(imgDict) 
     print(jsonBody) 
     request.httpBody = jsonBody 
    } catch let jsonError { 
     print(" Parsing Error: "+jsonError.localizedDescription) 
    } 

     URLSession.shared.dataTask(with: request as URLRequest) { (data, response, error) in 
      if error != nil { 
       print("Image upload API Error: "+error!.localizedDescription) 
      } 
      guard let data = data else { return } 
      do { 
       print(data) 
       let responseData = try JSONDecoder().decode(BasicResponseParameter.self, from: data) 
       print(responseData) 

       if responseData.success { 
        print("Image uploaded") 
       } 
       else { 
        print("Image upload API Failed : "+responseData.message!) 
        DispatchQueue.main.async(execute: { 
         popAlert(title: "FAILED", message: responseData.message!, owner:self) 
        }) 
       } 
      } catch let jsonError { 
       print("Image upload API JSON Error :"+jsonError.localizedDescription) 
      } 
      }.resume() 
    } 

任何幫助表示讚賞。

Answer 1

我建議你進行編碼（發送圖像到您的服務器時）和解碼（查詢圖像回來的時候），你的圖像轉換成base64格式

編碼

let img = /// this is your image 
let encodedString = UIImagePNGRepresentation(img)?.base64EncodedString() 

解碼：

let data_from_response = /// from your response 
let decodeData = Data(base64Encoded: data_from) 

既然你在你的請求主體發送dictionary，您將需要轉換您dictionary爲json

guard let imgDataString = String.init(data: encodedString, encoding: String.Encoding.utf8) else { return } 

let imgDict = ["image": imgDataString ] 

let jsonData = try! JSONSerialization.data(withJSONObject: imgDict, options: .prettyPrinted) 

request.httpBody = jsonData 

旁註避免implicit optional unwrapping意思!，要麼使用if let或guard聲明