Question

尝试发布数据时遇到此错误：“由于格式不正确，无法读取数据”

class ViewController: UIViewController {

    @IBOutlet weak var recipe_id: UITextField!
    var getdata = NSMutableData()

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }
    @IBAction func Btn_Sav(_ sender: Any)
    {
        let url_str = URL(string:"http://iroidtechnologies.in/bigfish/Bigfish_cntrl/HealthyFish_Recipes_Detail")
        var url_req = URLRequest(url: url_str!)

        url_req.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "context_type")
        url_req.httpMethod = "Post"
        let Poststring = "recipe_id=\(recipe_id.text))"
        url_req.httpBody = Poststring.data(using: .utf8)

        let task = URLSession.shared.dataTask(with: url_req){(data,request,error) in

            if  let mydata_post = data
            {
                self.getdata.append(mydata_post)
                do
                {

                    let jsondata_post = try JSONSerialization.jsonObject(with: self.getdata as Data, options: []) as! NSDictionary

                    print("jsondata_post------->",jsondata_post)
                }
                catch{
                    print("error",error.localizedDescription)
            }

        }

        };
        task.resume()

    }

尝试发布数据时遇到此错误：“由于格式不正确，无法读取数据”

Answer 1

最可能的问题是可选的text属性，该属性将文字Optional(添加到字符串中，而结尾的)也可能不是故意的。

您必须解开可选内容（请命名变量 lowerCamelCased ）。

let postString = "recipe_id=\(recipe_id.text!)"

和httpMethod字符串应该大写

urlReq.httpMethod = "POST"

进一步删除getdata

~~var getdata = NSMutableData()~~

不需要它，无论如何您都不应该在Swift中使用NSMutableData。并使用本机Swift集合类型，而不要使用NSDictionary和NSArray

if let data = data {
    do {
        let jsondataPost = try JSONSerialization.jsonObject(with: data) as! [String:Any]
    ...

尝试发布数据并出现错误“由于数据格式不正确而无法读取数据”时，

1 个答案: