ios - SWIFT:推送 segue 导致模态 segue

Question

在我的 Storyboard中，模态转场将用户带到登录屏幕(从主屏幕)。然后，我从注册屏幕添加了一个 PUSH segue 到下一个屏幕(创建配置文件)，该屏幕嵌入在导航 Controller 中(创建配置文件屏幕是包含“测试”按钮的屏幕)。

注册屏幕的转接工作正常。然而，当用户输入他们的凭据并单击“注册”时，它确实会将他们带到正确的屏幕，但使用模式转场与推送转场。我不知道为什么会这样。

这是我的注册 View Controller 代码。任何帮助将不胜感激!

import UIKit
import Parse

class SignInViewController: UIViewController {

@IBOutlet weak var usernameField: UITextField!
@IBOutlet weak var passwordField: UITextField!

@IBAction func signInButton(sender: AnyObject) {

    PFUser.logInWithUsernameInBackground(usernameField.text!, password:passwordField.text!) {
        (user: PFUser?, error: NSError?) -> Void in
        if user != nil {

            //self.performSegueWithIdentifier("loginUser", sender: self)

            self.usernameField.text = ""
            self.passwordField.text = ""

        } else {

            if let errorString = error?.userInfo["error"] as? String {

                self.displayAlert("Login Failed", message: errorString)

            }

        }
    }

}

@IBAction func signUpButton(sender: AnyObject) {

    if usernameField.text == "" || passwordField.text == "" {

        self.displayAlert("Missing Field(s)", message: "Username and password are required")

    } else {

        let user = PFUser()
        user.username = usernameField.text
        user.password = passwordField.text

        user.signUpInBackgroundWithBlock {
            (succeded, error) -> Void in

            if let error = error {
                if let errorString = error.userInfo["error"] as? String {

                    self.displayAlert("Sign Up Failed", message: errorString)

                }


            } else {

                self.performSegueWithIdentifier("SignUpToCreate", sender: self)

                self.usernameField.text = ""
                self.passwordField.text = ""

            }
        }
    }
}

//Dismiss the sign in screen
@IBAction func closeButton(sender: AnyObject) {

    self.dismissViewControllerAnimated(true, completion: nil)

}

override func viewDidLoad() {
    super.viewDidLoad()

    //Format the text fields
    textFieldUI()


}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}








//Display alert function
func displayAlert(title: String, message: String) {

    let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.Alert)
    alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
    self.presentViewController(alert, animated: true, completion: nil)

}

//Textfield UI
func textFieldUI() {

    passwordField.leftView = UIView(frame: CGRectMake(0, 0, 8, 0))
    passwordField.leftViewMode = .Always
    usernameField.leftView = UIView(frame: CGRectMake(0, 0, 8, 0))
    usernameField.leftViewMode = .Always

}

}

Answer 1

这是不可能的:

Root --(modal)--> SignUp --(push)--> NavigationController<->Detail

结构应该是这样的

Root --(modal)--> NavigationController<->Signup --(push)--> Detail

我认为您的设计有误，因为您不想在注册 Controller 中显示导航栏。您可以通过在显示之前设置 View Controller navigationBarHidden 来防止这种情况。