我需要将动态数据从我的屏幕发送到 action/reducer 并使用该数据从 API 获取数据，但是当我在我的rootSaga 中让步时，我会收到这样的错误：

在检查 take(patternOrChannel) 时
未捕获：patternOrChannel 未定义在 rootSaga at rootSaga
at takeEvery处未捕获
错误：take(patternOrChannel)：patternOrChannel 未定义

屏幕代码：

import { checkUserLoginStatus, userSignin } from '../actions/user';

class PreCheckout extends PureComponent {
   handleLogin = () => {
     this.props.dispatch(userSignin(username, password));
   };
   render() { .......

行动：

const USER_SIGNIN = 'USER_SIGNIN';

export const userSignin = (username, password) => ({
   type: USER_SIGNIN,
   username,
   password,
});

减速器：

import {
  CHECK_USER_LOGIN_STATUS,
  USER_SIGNIN,
  USER_SIGNIN_RESULT,
  USER_SIGNIN_ERROR,
} from '../actions/user';

const initialState = {
  isLoggedIn: false,
  isFetching: false,
  information: {},
  error: null,
};

const reducer = (state = initialState, action) => {
  switch (action.type) {
    case CHECK_USER_LOGIN_STATUS:
      return {
        ...state,
      };
    case USER_SIGNIN:
      return {
        ...state,
        isFetching: true,
      };
    case USER_SIGNIN_RESULT:
      return {
        ...state,
        isFetching: false,
        information: action.result,
      };
    case USER_SIGNIN_ERROR:
      return {
        ...state,
        isFetching: false,
        error: action.error,
      };

Redux-Saga：

import {
  USER_SIGNIN,
  USER_SIGNIN_RESULT,
  USER_SIGNIN_ERROR,
} from '../actions/user';

function* fetchUserInformation(action) {
  try {
    console.log('fetchUserInformation action: ', action);
    const response = yield call(login, action);
    yield put({
      type: USER_SIGNIN_RESULT,
      result: response.result,
    });
  } catch (e) {
    yield put({
      type: USER_SIGNIN_ERROR,
      error: e.message,
    });
  }
}

export default function* rootSaga() {
  yield takeEvery(USER_SIGNIN, fetchUserInformation);
}