在iOS中推送路线时抖动黑屏

我在启动屏幕上,它工作正常,4秒钟后,我跳转到登录屏幕,而不是显示登录屏幕,它显示了一个没有任何内容的黑屏。 我跳转到登录屏幕

Navigator.of(context).push(MaterialPageRoute(builder: (context) => Login()));

谁能告诉我哪里出了问题?我尝试过各种方法,比如在两条路由(Splash和login)上使用WillPopScope()小部件,更改路由名称,

它在安卓系统上运行得很好,但在iOS上却不行,这有点奇怪。 我登录页面的代码是

 @override
 Widget build(BuildContext context) {
 this._context = context;
 return new GestureDetector(
   onTap: () {
    _dismissKeyboard(_context);
   },
   child: SingleChildScrollView(child: Scaffold(
      key: scaffoldState,
      resizeToAvoidBottomPadding: false,
      body: !isLoading
          ? new Stack(
              children: <Widget>[
                Container(
                    child: new Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    Hero(
                        tag: "pricelogo",
                        child: new Container(
                          child: Image.asset('assets/logo.png'),
                          height: 100.0,
                          width: 100.0,
                        )),
                    Container(
                      height: 80.0,
                    ),
                    Container(
                      decoration:
                          BoxDecoration(color: Colors.lightBlue[50]),
                      margin: EdgeInsets.only(left: 40.0, right: 40.0),
                      padding: EdgeInsets.only(
                          left: 10.0, right: 10.0, top: 5.0, bottom: 5.0),
                      child: TextField(
                        controller: emailController,
                        decoration: InputDecoration(
                          icon: new Container(
                            child: new ImageIcon(
                              new AssetImage("assets/user.png"),
                              color: Colors.blue,
                            ),
                          ),
                          hintText: 'Email',
                          hintStyle: new TextStyle(fontSize: 16.0),
                          border: InputBorder.none,
                        ),
                        style: new TextStyle(
                            color: Colors.black, fontSize: 16.0),
                      ),
                    ),
                    Container(
                        decoration:
                            BoxDecoration(color: Colors.lightBlue[50]),
                        margin: EdgeInsets.only(
                            left: 40.0, right: 40.0, top: 20.0),
                        padding: EdgeInsets.only(
                            left: 10.0, right: 10.0, top: 5.0, bottom: 5.0),
                        child: new TextField(
                          controller: passwordController,
                          obscureText: true,
                          decoration: InputDecoration(
                            icon: new Container(
                                child: new ImageIcon(
                              new AssetImage("assets/password.png"),
                              color: Colors.blue,
                            )),
                            hintText: 'Password',
                            hintStyle: new TextStyle(fontSize: 16.0),
                            border: InputBorder.none,
                          ),
                          style: new TextStyle(
                              color: Colors.black, fontSize: 16.0),
                        )),
                    Padding(
                      padding: EdgeInsets.symmetric(vertical: 45.0),
                      child: Material(
                        borderRadius: BorderRadius.circular(30.0),
                        shadowColor: Colors.blue,
                        elevation: 5.0,
                        child: MaterialButton(
                          minWidth: 300.0,
                          height: 50.0,
                          onPressed: () {
                            if (areFieldsValid()) {
                              if (_connectionStatus ==
                                      ConnectivityResult.wifi ||
                                  _connectionStatus ==
                                      ConnectivityResult.mobile) {
                                _makeLoginApiCall();
                              } else {
                                scaffoldState.currentState.showSnackBar(
                                    new SnackBar(
                                        content: new Text(
                                            "Please check your internet connection and try again")));
                              }
                            }
                          },
                          color: Colors.blue,
                          child: Text('Login',
                              style: TextStyle(color: Colors.white)),
                        ),
                      ),
                    ),
                    Container(
                      margin: EdgeInsets.only(bottom: 20.0),
                      child: Text("or sign in with:"),
                    ),
                    Center(
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.center,
                        children: <Widget>[
                          isFacebookSignInEnabled
                              ? Image(
                                  image: AssetImage("assets/facebook.png"),
                                  height: 50.0,
                                  width: 50.0,
                                )
                              : Container(),
                          Container(
                            width: isGoogleSignInEnabled ? 40.0 : 0.0,
                          ),
                          isGoogleSignInEnabled
                              ? Image(
                                  image: AssetImage("assets/google.png"),
                                  height: 50.0,
                                  width: 50.0,
                                )
                              : Container(),
                        ],
                      ),
                    ),
                  ],
                )),
                Container(
                    margin: EdgeInsets.only(left: 15.0, bottom: 5.0),
                    alignment: Alignment.bottomLeft,
                    child: Row(
                      children: <Widget>[
                        Text(
                          "Don't have an account?",
                          style: TextStyle(fontSize: 14.0),
                        ),
                        GestureDetector(
                          onTap: () {
                            Navigator.push(
                                context,
                                MaterialPageRoute(
                                    builder: (context) => Signup()));
                          },
                          child: Text(
                            "  Signup",
                            style: TextStyle(
                                color: Colors.blueAccent,
                                decoration: TextDecoration.underline,
                                fontSize: 16.0),
                          ),
                        )
                      ],
                    )),
                GestureDetector(
                  onTap: () {
                    Navigator.of(context).push(MaterialPageRoute(
                        builder: (context) => ForgotPassword()));
                  },
                  child: Container(
                    margin: EdgeInsets.only(right: 15.0, bottom: 5.0),
                    alignment: Alignment.bottomRight,
                    child: Text(
                      "Forgot Password?",
                      style: TextStyle(fontSize: 14.0),
                    ),
                  ),
                )
              ],
            )
          : Container(
              alignment: Alignment.center,
              child: CircularProgressIndicator(
                strokeWidth: 4.0,
                backgroundColor: Colors.blue,
              ),
            )),
      ),
    );
  }