使用 Alamofire 上传具有 base64String 编码的多个图像的数组

Posted 2023-02-24

【中文标题】使用 Alamofire 上传具有 base64String 编码的多个图像的数组

【英文标题】：Upload Array having base64String encoded multiple images using Alamofire

【发布时间】：2016-04-04 07:14:46

【问题描述】：

我正在努力使用 Alamofire 将多个图像发送到后端。我在 NSMutableArray 中添加了 base64 图像字符串。现在我正在尝试将这个字符串数组发送到服务器，但它不起作用。

我尝试过通过这种方式上传单张图片，效果非常棒，但为什么不是一组图片。

图像选择 -

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
    
        if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage
        
            imageView.contentMode = .ScaleAspectFit
            imageView.image = pickedImage
            slctdImage = pickedImage

        

        dismissViewControllerAnimated(true, completion: nil)

        uploadImage(slctdImage)


    

上传中

func uploadImage( image:UIImage)
    

        let pic :NSData = UIImageJPEGRepresentation(image, 0.5)!

        let str = pic.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0))

      //imageArray is declared as var imageArray = NSMutableArray()

        imageArray.addObject(str)


        //when imageArray count reaches 3 I send the images
        if imageArray.count==3
        

        let parameters = [
            "task": "doNotification",
            "image" : imageArray,
            "select_category" : "exams",
            "select_type" : "quarterly",
            "class" : "1",
            "repliable" : "0",
            "select_students" : ["25","26"],
            "select_group" : "Super Users",
            "title" : "Hello",
            "text" : "asdfsdf",
            "date" : "2015-12-15",
        "time" : "10:50 AM"]


        Alamofire.request(.POST, UrlClass.baseUrl, parameters:parameters ) .response 
            (request, response, data, error) in

          // self.startParsing(data!)

            print(response)


        
    

    

那么如何解决这个问题呢？请建议修改代码或其他方式。

【问题讨论】：

您确定您调用的端点支持一次发送多个图像吗？如果是这样，我会假设它需要将它们作为 MultipartFormData 发送。

【参考方案1】：

使用以下代码将图像上传到服务器

   let image = UIImage(named:"testImage")
    Alamofire.upload(
        .POST,
        URL,
        multipartFormData:  multipartFormData in
            multipartFormData.appendBodyPart(data: UIImageJPEGRepresentation(image, 1)!, name: "imageFile",
                fileName: "image.jpg", mimeType: "image/jpeg")
        ,
        encodingCompletion:  encodingResult in
            switch encodingResult 
            case .Success(let upload, _, _):
                upload.progress  bytesWritten, totalBytesWritten, totalBytesExpectedToWrite in
                    dispatch_async(dispatch_get_main_queue()) 
                        let percent = (Float(totalBytesWritten) / Float(totalBytesExpectedToWrite))
                        //progress(percent: percent)
                        print(percent)
                    
                
                upload.validate()
                upload.responseJSON  response in
                    if response.result.error != nil 
                        // failure

                     else 
                            // success

                    

                

            case .Failure(let encodingError):
                print(encodingError)
                //failure
            
        
    )

多张图片

Alamofire.upload(
            .POST,
            urlString,
            multipartFormData:  multipartFormData in
                multipartFormData.appendBodyPart(data: "122222".dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!, name :"Id")
                multipartFormData.appendBodyPart(data: "test1111".dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!, name :"sId")

                multipartFormData.appendBodyPart(data: "", name :"ContractorIds")
                multipartFormData.appendBodyPart(data:date.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!, name :"ExpectedOn")
                multipartFormData.appendBodyPart(data:date.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!, name :"ExpiresOn")


                multipartFormData.appendBodyPart(data: data.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!, name :"Notes")

                for image in images 
                    if let imageData = UIImageJPEGRepresentation(image, 0.05) 
                        multipartFormData.appendBodyPart(data: imageData, name: "file", fileName: "file.jpeg", mimeType: "image/jpeg")
                    
                
            ,

【讨论】：

您可以通过追加到multipartFromData数组来发送参数

以及您能否提及任何用于多张图片上传的代码。

是否需要在后端写一些特殊的编码。

兄弟什么是失败？它写了使用未解决的标识符“失败”。

不需要Abhishek，请检查上面编辑的多个图像上传到服务器的答案，您也可以在将参数附加到多部分数据时指定编码类型。

【参考方案2】：

这是另一个版本，因为我在服务器端遇到了读取多个图像的问题：

Alamofire.upload(multipartFormData:  (multipartFormData) in
        // Sending parametes with images
        multipartFormData.append(jsonString.data(using: String.Encoding.utf8)!, withName: "parameters")

        for (key, value) in parameters 
            if let  files = value as? Array<Any>, key == "files" 

                for i in files.enumerated() 
                    let image = UIImage(named: "\(i.element)")

                    // add image
                    multipartFormData.append(UIImageJPEGRepresentation(image!, 1)!, withName: "file" , fileName: "\( NSUUID().uuidString)" , mimeType: "image/jpeg")
                    // if you face problem add below lines as to make sepration between two images
                    multipartFormData.append("\r\r".data(using: String.Encoding.utf8)!, withName: "")

                
            
            else  
        
    ,to:baseURL)