URLRequestが終了するまでメインスレッドを待機させます。

Question

URLRequestが完了するまで実行を保留しようとしています。

func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!, withError error: Error!) { 
    self.sendRequest(request: request as URLRequest) { 
     } 
    self.firebaseAuth(credential) 
    self.performSegue(withIdentifier: SEGUE_TO_FIRST_CONTENT_PAGE, sender: nil) 

} 

func sendRequest (request: URLRequest, completion: @escaping() ->()) { 
    let session = URLSession.shared 

    session.dataTask(with: request as URLRequest) { (data, response, error) in 
     UIApplication.shared.isNetworkActivityIndicatorVisible = false 
     do { 
      let userData = try JSONSerialization.jsonObject(with: data!, options:[]) as? [String:AnyObject] 
      let genderData = userData!["gender"] as! String 
      self.userObject.gender = genderData 
      completion() 
     } catch { 
      completion() 
      print("ERROR") 
     } 
     print("sendRequest Done!") 
     }.resume() 
} 

今のところ、sendRequest（）を終了する前にもsegueを実行します。 sendRequest（）が完了するまでにメインスレッドの待機を行う方法を理解できません。

Answer 1

要求のステータスを渡し、操作はUIとは何であるstatus.Ifに基づいて完了ハンドラでアクションを実行するために完了ハンドラを変更し、その後、

func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!, withError error: Error!) { 
    self.sendRequest(request: request as URLRequest){ (loginStatus) in 
     if loginStatus { 
      DispatchQueue.main.async { 
      self.firebaseAuth(credential) 
      self.performSegue(withIdentifier: SEGUE_TO_FIRST_CONTENT_PAGE, sender: nil) 
      } 
     } 
     else{ 
      //Handle Error case 
     } 
    } 

} 

func sendRequest (request: URLRequest, completion: @escaping (Bool) ->()) { 
    let session = URLSession.shared 

    session.dataTask(with: request as URLRequest) { (data, response, error) in 
     UIApplication.shared.isNetworkActivityIndicatorVisible = false 
     do { 
      let userData = try JSONSerialization.jsonObject(with: data!, options:[]) as? [String:AnyObject] 
      let genderData = userData!["gender"] as! String 
      self.userObject.gender = genderData 
      completion(true) 
     } catch { 
      completion(false) 
      print("ERROR") 
     } 
     print("sendRequest Done!") 
     }.resume() 
}