Question

我想要得到的是，当我以应该可以进入另一页的形式输入ID和密码时。但是，当我按Submit时，什么也没发生。我得到的错误是使用不相关类型的引用进行的Equality运算符==调用。有什么办法解决这个问题？

  Form(
                    key: _formKey,
                    
                        child: Column(children: <Widget>[
                      TextFormField(
                        controller: nameController,
                        decoration: InputDecoration(labelText: 'Id'),
                        keyboardType: TextInputType.emailAddress,
                        validator: (value) {
                          if (value.isEmpty) {
                            return 'Enter id';
                          }
                          return null;
                        },
                      ),
                      TextFormField(
                        controller: passwordController,
                        decoration: InputDecoration(labelText: 'Password'),
                        obscureText: true,
                        validator: (value) {
                          if (value.isEmpty) {
                            return 'invalid password';
                          }
                          return null;
                        },
                      ),
                      SizedBox(height: 30),
                      RaisedButton(
                        child: Text('Submit'),
                        onPressed: () {
                          if (nameController ==  //i am getting a blue underline over here
                                  FirebaseFirestore.instance
                                      .collection("proddecAdmin")
                                      .doc("1")
                                      .set({'Id': ''}) &&
                              passwordController == //i am getting a blue underline over here
                                  FirebaseFirestore.instance
                                      .collection("proddecAdmin")
                                      .doc("1")
                                      .set({
                                    'password': '',
                                  })) {
                            Navigator.push(
                              context,
                              MaterialPageRoute(
                                  builder: (context) => ProfilePage()),
                            );
                          }
                        },

Answer 1

nameController和密码控制器只是TextEditingController实例。您要与存储在控制器中的值进行比较。例如

nameController.value.text == ''

passwordController.value.text == ''

颤抖：不导航到另一页

1 个答案: