用路由器V4匹配标签对组件的反应本机给出了不确定的组件

Question

我正在尝试基于此链接的React路由器V4的React路由器本机

Match标签给我一个错误

React.createElement: type is invalid — expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it’s defined in. Check the render method of

这些组件可用，我什至尝试明确创建组件。

完整代码 导入react，{component}来自'react'; 进口 { 应用程序， 样式表， 文本， 看法， 触摸光明， }来自"反应"； 导入{Match，Miss，Memory Router as as Router}从" React-Router";

  const componentFactory = (routeName) => () => (
    <View>
      <Text style={styles.route}>{routeName}</Text>
    </View>
  )
  const NavLink = ({to, children}, context) => {
    const pressHandler = () => context.router.transitionTo(to);
    return (
      <TouchableHighlight onPress={pressHandler}>
        {children}
      </TouchableHighlight>
    )
  }
  NavLink.contextTypes = {router: React.PropTypes.object}
  export default class RR4Native extends Component {
    render() {
      return (
        <Router>
          <View style={styles.container}>
            <View style={styles.routeContainer}>
              <Match exactly pattern="/" component={componentFactory('Home')}/>
              <Match pattern="/about" component={componentFactory('About')}/>
              <Match pattern="/topics" component={componentFactory('Topics')}/>
              <Miss component={componentFactory('Nope, nothing here')}/>
            </View>
            <View style={styles.container}>
              <NavLink to="/">
                <Text style={styles.routeLink}>
                  Home
                </Text>
              </NavLink>
              <NavLink to="/about">
                <Text style={styles.routeLink}>
                  About
                </Text>
              </NavLink>
              <NavLink to="/topics">
                <Text style={styles.routeLink}>
                  Topics
                </Text>
              </NavLink>
              <NavLink to="/broken">
                <Text style={styles.routeLink}>
                  Broken
                </Text>
              </NavLink>
            </View>
          </View>
        </Router>
      );
    }
  }
  const styles = StyleSheet.create({
    container: {
      flex: 1,
      justifyContent: 'center',
      alignItems: 'center',
      backgroundColor: '#F5FCFF',
    },
    route: {
      color: '#701010',
      fontSize: 40
    },
    routeLink: {
      color: '#0000FF'
    },
    routeContainer: {
      flex: 1,
      justifyContent: 'center'
    }
  });
  AppRegistry.registerComponent('RR4Native', () => RR4Native);

Answer 1

在react-router的最终版本中，没有Match和Miss。您只需要使用Route即可。在您的情况下，您需要执行以下操作：

<View style={styles.routeContainer}>
    <Switch>
        <Route exact path="/" component={componentFactory('Home')}/>
        <Route path="/about" component={componentFactory('About')}/>
        <Route path="/topics" component={componentFactory('Topics')}/>
        <Route component={componentFactory('Nope, nothing here')}/>
    </Switch>
</View>

有关详细信息，请参见React路由器文档中的Nomatchexample。