在iOS swift中将图像上传到服务器

Posted 2023-02-24

【中文标题】在iOS swift中将图像上传到服务器

【英文标题】：upload image to server in iOS swift

【发布时间】：2020-06-12 17:57:04

【问题描述】：

我是 swift 新手。

我不知道如何使用 Alamofire 将图像从 UIImage Piker 控制器上传到服务器。不幸的是，我从上周开始尝试了许多来自 *** 和 Google 等的解决方案。但我想不通。

请任何人帮助我。

现在我尝试实现这段代码：

func uploadImgRiderAPI()

        print("I am in uploadImgAPI")
        let imgData = UIImageJPEGRepresentation(profilePicOut.image!, 0.2)! //Error: UIImageJPEGRepresentation' has been replaced by instance method 'UIImage.jpegData(compressionQuality:)'

        let parameters : [String : Any] = ["image": imgData, "riderId" : "5ed4eecfe3ec0c6b7c8e4990"]

        guard let url = URL(string: "\(Constents.baseURL)/rider/uploadImage") else 
            print("Invalid URL")
            return
        

        AF.upload(multipartFormData:  multipartFormData in
            multipartFormData.append(imgData, withName: "image",fileName: "alkaram.png", mimeType: "image/jpg")
            for (key, value) in parameters 

                multipartFormData.append(value.data(using: String.Encoding.utf8), withName: key) // Error: Cast 'Any' to 'AnyObject' or use 'as!' to force downcast to a more specific type to access members

                 
        , to:url)  (result) in
            switch result 
            case .success(let upload, _, _): //Error : Pattern cannot match values of type 'URLRequest'

                upload.uploadProgress(closure:  (progress) in
                    print("Upload Progress: \(progress.fractionCompleted)")
                )

                upload.responseJSON  response in
                     print(response.result.value)
                     if let result = response.data 
                                do 

                                    let jsonData = try JSONEncoder().encode(parameters)
                                    let jsonString = String(data: jsonData, encoding: .utf8)


                                    let url = URL(string: self.retrivedRiderProfileImg!)
                                    print("Complete URL is :-> \(url)")

                                    let placeholderImage = UIImage(named: "referral_icon")!
                                    self.profilePicOut.af_setImage(withURL: url!, placeholderImage: placeholderImage)

                                    print("JSON String : " + jsonString!)
                                    print("And Responce is : \(response)")


                                 catch 
                                    print(error)

                                
                            
                

            case .failure(let encodingError): //Error : Pattern cannot match values of type 'URLRequest'
                print(encodingError)
            
        
    

【问题讨论】：

那么您面临的问题是什么？

case .success(let upload, _, _): //Error : Pattern cannot match values of type 'URLRequest'

让 imgData = UIImageJPEGRepresentation(profilePicOut.image!, 0.2)！ //错误：UIImageJPEGRepresentation'已被实例方法'UIImage.jpegData(compressionQuality:)'替换

case .failure(let encodingError): //Error : Pattern cannot match values of type 'URLRequest'

【参考方案1】：

首先，您需要将 UIImageJPEGRepresentation 的旧 API 替换为新的 jpegData(compressionQuality:) 方法。

替换这个：

let imgData = UIImageJPEGRepresentation(profilePicOut.image!, 0.2)!

有了这个：

guard let imgData = profilePicOut.image?.jpegData(compressionQuality: 0.2) else  return 

并替换case，其中仅返回一个 URLRequest 参数，以仅接受一个参数作为错误状态。

替换这个：

case .success(let upload, _, _):

有了这个：

case .success(let upload):

【讨论】：

case .success(let upload): //Pattern不能匹配'URLRequest'类型的值

multipartFormData.append((value as AnyObject).data(using: String.Encoding.utf8), withName: key) //不能使用类型为'的参数列表调用'data'（使用： String.Encoding)'