Alamofire上传文件

请求的接口

一般用户修改头像都是修改的头像的连接，这里我们后台是直接上传的文件，所以我就基于Alamofire封装了一个带有文件参数的网络请求方法

//MARK:-----------file请求-------------//
    class func requestFile(urlString:String,params:[String:Any], method:HTTPMethod,success:@escaping(_ response:[String:Any])->()){
        //这里是接口和参数
        let url = "\(BASE_URL)\(api_common_mid)\(urlString)"
        print("\(url)\n\(params)")
        
        //
        Alamofire.upload(multipartFormData: { (formdata) in
            
            //这里因为不同接口的参数名肯定不一样，所以就用你传的参数名。
            for (key,value) in params{
                
                //然后formdata只接受Data所以这里转换一下
                if let content = value as? String {
                    formdata.append(content.data(using: String.Encoding.utf8)!, withName: key)
                }
                
                // 如果是图片的话吧图片转化成Data
                if let content = value as? UIImage{
                    formdata.append(content.getData(), withName: key)
                }
                
            }
            
        }, to: url) { (result) in
            switch result {
            case .success(let upload, _, _):
                upload.responseJSON { response in
                    //自己封装的处理请求返回的结果
                    self.responseApply(response, success: success)
                }
            case .failure(let encodingError):
                print(encodingError)
            }
        }
    }

调用

NetworkTool.requestFile(urlString: api_my_modification,params: ["uid":"1","username":"xxxx","file":UIImage(named:"xxx.png")], method: .post) { (response) in
            if let res = response["data"] as? Int{
                if res == 1 {
                    showSuccess("修改成功")
                    self.ischangedImage = false
                    //跟新用户信息
                    self.update_request()
                    return
                }
                showError("修改失败")
            }else{
                showError("修改失败")
            }
        }

注：图片转Data有可能会为空，解决办法是把要转换的图片重新绘制下就行了

extension UIImage{
    //MARK:-----------图片转data-------------//
    func getData() -> Data{
        let data = UIImageJPEGRepresentation(self.getNewImage(), 0.9)
        return data!
    }
    //MARK:-----------重新绘制一下图形-------------//
    fileprivate func getNewImage() -> UIImage{
        let w = self.size.width
        let h = self.size.height
        
        UIGraphicsBeginImageContext(self.size)
        self.draw(in: CGRect(x: 0, y: 0, width: w, height: h))
        let newImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return newImage!
    }
}