reactjs – 如何根据redux商店的内容在React Navigation中动态指

发布时间：2020-12-15 20:30:44 所属栏目：百科来源：网络整理

导读：我的导航器是： import { connect } from 'react-redux';import { createDrawerNavigator } from 'react-navigation';const screens = { Home: Homecreen,};if (this.props.userStatus !== 'active') { screens.Upgrade = UpgradeScreen;}const MainDrawer =

我的导航器是：

import { connect } from 'react-redux';
import { createDrawerNavigator } from 'react-navigation';

const screens = {
  Home: Homecreen,};
if (this.props.userStatus !== 'active') {
  screens.Upgrade = UpgradeScreen;
}

const MainDrawer = createDrawerNavigator(screens);

const mapStateToProps = (state) => {
  return { userStatus: state.user.status };
};

export default connect(mapStateToProps)(MainDrawer);

我想仅在用户状态未激活时才显示UpgradeScreen.在上面的代码中,我收到错误：

undefined is not an object (evaluating 'this.props.userStatus')

我该如何解决？

解决方法

要访问this.props.userStatus,您应该有一个组件.这是你如何做到的：

import { connect } from 'react-redux';
import { createDrawerNavigator } from 'react-navigation';

const screens = {
  Home: Homecreen,};

const MainDrawer = ({ userStatus }) => {
  if (userStatus !== 'active') {
    screens.Upgrade = UpgradeScreen;
  }

  const Navigator = createDrawerNavigator(screens);

  return <Navigator />
}

const mapStateToProps = (state) => {
  return { userStatus: state.user.status };
};

export default connect(mapStateToProps)(MainDrawer);

（编辑：李大同）

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