Alamofire 4 多部分

Posted 2023-02-24

【中文标题】Alamofire 4 多部分

【英文标题】：Alamofire 4 multipart

【发布时间】：2016-11-29 13:34:52

【问题描述】：

我尝试使用 Alamofire 4 创建多部分请求。 我不会添加 [String: AnyObject] 作为一部分。但是，当我的有效载荷 dict 应用程序中的 multipartFormData 附加 bool 或 [Int] 崩溃时！我的错在哪里？

    let payload: [String: AnyObject] = [
        "key1": "val1" as AnyObject,
        "key2": true as AnyObject,
        "key3" : [1,2,3,4] as AnyObject
    ]

    let requestString = "http://www.url.com/api/action"

    Alamofire.upload(multipartFormData:  (multipartFormData) in
        for (key, value) in payload 
            multipartFormData.append(value.data(using: String.Encoding.utf8.rawValue, allowLossyConversion: false)!, withName: "request", fileName: key, mimeType: "application/json")
        
        multipartFormData.append(imageUrl, withName: "fileData", fileName: "image", mimeType: "image/png")

    ,  to: requestString, method: .post , headers: ["Content-Type": "multipart/form-data"], encodingCompletion:  (result) in
        switch result 
        case .success(let upload, _, _):

            upload.uploadProgress(closure:  (progress) in
                print(progress.fractionCompleted * 100)
            )

            upload.responseJSON(completionHandler:  (response) in
            )
        case .failure(let error):
            print(error)

        
    )

【参考方案1】：

您发送了错误的参数。试试下面的 Alamofire 4 代码。

let payload: [String: AnyObject] = [
    "key1": "val1" as AnyObject,
    "key2": true as AnyObject,
    "key3" : [1,2,3,4] as AnyObject
]

let requestString = "http://www.url.com/api/action"

Alamofire.upload(multipartFormData:  (multipartFormData) in
    multipartFormData.append(UIImageJPEGRepresentation(self.photoImageView.image!, 0.5)!, withName: "photo_path", fileName: "swift_file.jpeg", mimeType: "image/jpeg")
    for (key, value) in payload 
        multipartFormData.append(value.data(using: String.Encoding.utf8)!, withName: key)
    
    , to: requestString, method: .post , headers:nil, encodingCompletion:  (result) in
    switch result 
    case .success(let upload, _, _):

        upload.uploadProgress(closure:  (progress) in
            print(progress.fractionCompleted * 100)
        )

        upload.responseJSON(completionHandler:  (response) in
        )
    case .failure(let error):
        print(error)

    
)

【讨论】：

multipartFormData.append(value.data(using: String.Encoding.utf8)!, withName: key) 不适用于数组，例如"key3" : [1,2,3,4] as AnyObject