故事板或SEGUE从视图控制器到的TabBar控制器

Question

我想实现从视图控制器的按钮赛格瑞/故事板在迅速3

My storyboard

标签栏控制器（首页）这是我的代码标志

@IBAction func LogIn(_ sender: Any) { 
    if self.emailTextfield.text == "" || self.passwordTextfield.text == "" { 
     let alertController = UIAlertController(title: "Error", message: "Please enter an email and password.", preferredStyle: .alert) 
     let defaultAction = UIAlertAction(title: "OK", style: .cancel, handler: nil) 
     alertController.addAction(defaultAction) 
     self.present(alertController, animated: true, completion: nil) 
    } else { 
     FIRAuth.auth()?.signIn(withEmail: self.emailTextfield.text!, password: self.passwordTextfield.text!) { (user, error) in 
      if error == nil { 
       print("You have successfully logged in") 
       //this is my storyboard but it gives me black screen 
       let vc = self.storyboard?.instantiateViewController(withIdentifier: "Home") 
       self.present(vc!, animated: true, completion: nil) 
      } else { 
       let alertController = UIAlertController(title: "Error", message: error?.localizedDescription, preferredStyle: .alert) 
       let defaultAction = UIAlertAction(title: "OK", style: .cancel, handler: nil) 
       alertController.addAction(defaultAction) 

       self.present(alertController, animated: true, completion: nil) 
      } 
     } 
    } 

} 

我试着用故事板

let vc = self.storyboard?.instantiateViewController(withIdentifier: "Home") 
       self.present(vc!, animated: true, completion: nil) 

我尝试使用赛格

self.performSegue(withIdentifier: "Home", sender: self) 

都给我黑屏。为什么？我也有一个澄清。我应该在哪里连接我的segue，是在标签栏控制器（灰色）还是第一个TAB控制器？

Answer 1

尝试下面的步骤，

1）在AppDelegate类中创建新功能

func LoginNav() 
{ 
     self.window = UIWindow(frame: UIScreen.main.bounds) 
     let storyboard = UIStoryboard(name: "Main", bundle: nil) 
     let mainViewController = storyboard.instantiateViewControllerWithIdentifier("MainTab") as! tabbarControllerViewController // U have to create tabbarControllerViewController for ur TabBarView 
     self.window?.rootViewController = mainViewController 
     self.window?.makeKeyAndVisible() 

} 

2）然后调用FUNC从任何视图 - 控制像下面

let appDelegate = UIApplication.shared.delegate as! AppDelegate 
appDelegate.LoginNav()