ios - “Initializer for conditional binding must have Optional type, not ' [String : Any] '” error in swift

这是出现错误的功能。

func LoadMapRoute(Url:String)
        {


            let url = URL(string: Url)

            let session = URLSession(configuration: .default)
            let task = session.dataTask(with: url!, completionHandler: {
                (data, response, error) in

                guard error == nil else {
                    print(error!.localizedDescription)
                    return
                }

                guard let jsonResult = try? (JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? [String: Any]),
                    let jsonResponse = jsonResult else {
                    print("error in JSONSerialization")
                    return
                }

                //Call this method to draw path on map
                self.drawPath(from: polyLineString)
            })
            task.resume()
        }

这是在guard let = jsonResult中显示错误的行

  let jsonResponse = jsonResult

最佳答案

请引用以下代码:

 guard let jsonResult = try? JSONSerialization.jsonObject(with: data!, options: .allowFragments),let jsonResponse = jsonResult  as? [String: Any] else {
      print("error in JSONSerialization")
      return
}

您的jsonResult已经解包，因此无需再次解包。

谢谢

关于ios - “Initializer for conditional binding must have Optional type, not ' [String : Any] '” error in swift，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/59372166/