Question

我是这样使用Alamofire上传图片的。

编辑：这是经过编辑的代码......

    for img in images {

    let url = "http:my url"
    let headers = [

           "Accept": "application/json",
           "Authorization": self.accessToken
       ]

if let imageData = (UIImageJPEGRepresentation(img, 0.6)) {
let parameters: [String: String]  =
            [

                  "seller_id": "\(self.mySellerId)",
                 "offline_id": self.prodID,
                 "is_default": "1",
                "sequence": "\(sequenceCount)"
           ]

    Alamofire.upload(multipartFormData: {(multipartFormData) in
               let filePath = NSURL(fileURLWithPath: url)

                    print(imageData)

                    multipartFormData.append (imageData, withName: "image", fileName: "\(Date().timeIntervalSince1970).jpg", mimeType: "image / jpg")


                    for (key, value ) in parameters {
                        print(key,value)

                        multipartFormData.append(value.data(using: .utf8)!, withName: key)
                    }
                }, to: url, method: .post, headers: headers)
                { (result) in
                    switch result {
                    case .success(let upload, _,_ ):


                        upload.uploadProgress(closure: { (progress) in
                            UILabel().text = "\((progress.fractionCompleted * 100)) %"
                            print (progress.fractionCompleted * 100)

                        })
                        upload.responseJSON { response in

                            if let JSON = response.result.value {
                                print(JSON)
                            }else{
                                print("Error")
                            }
                        }
                    case .failure(let encodingError):
                        print(encodingError)
                        break
                    }
                }
            }
    }

在for (key, value) in parameters...部分中，for循环遍历所有值。但当它到达图像数据部分时，它崩溃说Could not cast value of type 'Foundation.Data' (0x10787b9f0) to 'Swift.String'

应该给出什么，以便可以修复错误..？

Answer 1

您正在将parameters字典中的所有值转换为String，字典中的第一个条目为"product_image"，并且它将imageData作为值并且类型为{{ 1}}。

我会这样做，不再强行施放。

Data

您还可以检查值是否已经for (key, value) in parameters { if let v = value as? String, let valueAsData = v.data(using: .utf8) { multipartFormData.append(valueAsData, withName: key ) } }类型，并且只需将其添加为：

Data

使用Alamofire上传图片时崩溃

1 个答案: