// 获取图片        let uploadImage = UIImage(named: "jiadai");        // 保存文件的名称        let paths = NSSearchPathForDirectoriesInDomains(.DesktopDirectory, .AllDomainsMask, true);                /*         前面参数         DesktopDirectory         DocumentDirectory         DocumentationDirectory         */                /*         后面参数         UserDomainMask 保存在沙盒根目录         AllDomainsMask 保存在沙盒的Library路径下         */                let filePath = paths[0] + "jiadai.png";                print("\(filePath)");                // 保存成功会返回true        let result = UIImagePNGRepresentation(uploadImage!)?.writeToFile(filePath, atomically: true);                print("\(result)");