flutter - 导航到下一个屏幕时如何避免键盘弹出？

Question

当我从 LoginScreen() 导航到 HomeScreen() 时，键盘无缘无故地弹出一瞬间，然后在导航过程中立即关闭。

调用屏幕pushReplacement的函数:

    () async {
                      if (_formKey.currentState.validate()) {
                        final FirebaseAuth _auth = FirebaseAuth.instance;
                        try {
                          await _auth.signInWithEmailAndPassword(
                              email: email, password: password);
                        } catch (e) {
                          Scaffold.of(context).showSnackBar(SnackBar(
                            content: Text('Email or Password are incorrect'),
                          ));
                        }

                        _user = await _auth.currentUser();

                        if (_user == null) {}
                        if (_user.isEmailVerified == true) {
                          Navigator.of(context)
                              .pushReplacementNamed(HomeScreen.routeName);
                        } else
                          Scaffold.of(context).showSnackBar(SnackBar(
                            content: Text('Validate your email pls!'),
                          ));
                      }
                    },

和 HomeScreen():

    import 'package:final_login/screens/loginscreen.dart';
    import 'package:final_login/services/auth.dart';
    import 'package:flutter/material.dart';

    class HomeScreen extends StatefulWidget {
      static const routeName = '/home-screen';
      @override
      _HomeScreenState createState() => _HomeScreenState();
    }

    class _HomeScreenState extends State<HomeScreen> {
      @override
      Widget build(BuildContext context) {
        return Scaffold(
          appBar: AppBar(),
          body: Center(
            child: Column(
              children: <Widget>[
                RaisedButton(
                  child: Text('Log out'),
                  onPressed: (){
                    AuthService().signOut();
                    Navigator.of(context).pushReplacementNamed(LoginScreen.routeName);
                  },
                ),

              ],
            ),
          ),
        );
      }
    }

---

通过在函数调用之前放置 FocusScope.of(context).requestFocus(FocusNode()); 解决。

Answer 1

更新:

下面的答案不再是 flutter 更新后最好的方法，现在这是更好的方法:

FocusScope.of(context).unfocus();

旧答案

试试这个，它会在推送新页面之前以编程方式删除键盘:

if (_user.isEmailVerified == true) {
  FocusScope.of(context).requestFocus(FocusNode());
  Navigator.of(context).pushReplacementNamed(HomeScreen.routeName);
}