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调用rootViewController后未加载,使用->present(viewControllerToPresent:UIViewController,animated:true,completion:nil)

rootviewcontroller uiviewcontroller swift ios

0

N. Der · 技术社区 · 6 年前

我的rootViewController工作正常,加载正常。但是,当我用 present(viewControllerToPresent: UIViewController, animated: true, completion: nil) 从另一个viewController我只得到一个黑屏。

@objc func handleLogin() {
    print("LOGIN BUTTON TOUCHED")
    guard let email = emailTextField.text, let password = passwordTextField.text else {
        print("Form is not valid.")
        return
    }
    Auth.auth().signIn(withEmail: email, password: password) { (user, error) in
        if error != nil {
            print(error!)
            return
        }
        let viewController = RootViewController()
   ***  self.present(viewController, animated: true, completion: nil)
        print("Logged in")            
    }
}

2 回复 | 直到 6 年前

1

Xuan-Gieng Nguyen 6 年前

这没有错 self.present(viewController, animated: true, completion: nil)

RootViewController() 已呈现。你看到的黑屏可能是没有任何数据的?我不确定,需要你的代码。

您可以考虑的另一种方法是替换真实的 rootViewController 从当前 uiWindow

@objc func handleLogin() {
  print("LOGIN BUTTON TOUCHED")
  guard let email = emailTextField.text, let password = passwordTextField.text else {
    print("Form is not valid.")
    return
  }

  Auth.auth().signIn(withEmail: email, password: password) { [weak self] (user, error) in
    guard let strongSelf = self else { return }
    guard error == nil else { return }
    guard let user = user else { return }

    UIApplication.shared.keyWindow?.rootViewController = RootViewController()
    print("Logged in")            
  }
}

2

0

slash gamer 6 年前

您已经创建了一个新实例(RootViewController),它必须是黑色的。。你没有提到你的RootViewController