Question

如何在某些操作后转到viewcontroller，例如：

func requestForAccessToken(authorizationCode: String) {

        Alamofire.request(url, method: .post, parameters: parameters, encoding: JSONEncoding.default, headers: nil)
            .responseJSON { response in

            switch response.result {
            case .success(let JSON):
                let response = JSON as! NSDictionary
                let accessToken = response.object(forKey: "access_token")!
                UserDefaults.standard.set(accessToken, forKey: "LIAccessToken")
                UserDefaults.standard.synchronize()
                ///here...
                DispatchQueue.main.async(execute: { () -> Void in
//                    self.dismiss(animated: true, completion: nil)
                    let secondViewController: LoginViewController = LoginViewController()
                    self.present(secondViewController, animated: true, completion: nil)
                })
            case .failure(let error):
                print("Request failed with error: \(error)")

            }
        }

    }

我在storyboard中创建vc并制作vc类文件。也许我必须做别的事。

Answer 1

如果您是viewController中的storyboard，那么您必须使用故事板进行实例化。试试这个：

DispatchQueue.main.async(execute: { () -> Void in
    let secondViewController = UIStoryboard(name:"LoginViewController", bundle: nil.instantiateViewControllerWithIdentifier("LoginV‌iewController") as? LoginViewController
    self.present(secondViewController, animated: true, completion: nil)
})

希望您已将故事板命名为LoginViewController，并将storyboardID作为LoginViewController提供

如何在代码中打开viewcontroller

1 个答案: