反应原生 Flatlist 导航 [英] react native Flatlist navigation

问题描述

我遇到了错误TypeError:无法读取未定义的属性导航".我不明白如何将导航组件传递给每个孩子，所以当用户按下一个项目时，它可以使用 React Navigation 导航到 employeeEdit 组件.如果这很明显，我是新手对不起.

I m getting error TypeError: Cannot read property 'navigation' of undefined. I don't understand how to pass navigation component into each child so when a user presses an item it can navigate to employeeEdit component using React Navigation. i am newbie sorry if this is obvious.

import React, { Component } from 'react';
import { FlatList } from 'react-native';
import { connect } from 'react-redux';
//import { R } from 'ramda';
import _ from 'lodash';
import { employeesFetch } from '../actions';
import { HeaderButton } from './common';
import ListEmployee from './ListEmployee';


class EmployeeList extends Component {
  static navigationOptions = ({ navigation }) => ({
    headerRight: (
      <HeaderButton onPress={() => navigation.navigate('employeeCreate')}>
        Add
      </HeaderButton>
    )
  });

  componentWillMount() {
    this.props.employeesFetch();
  }

  keyExtractor(item) {
    return item.uid;
  }
  renderItem({ item }) {
    return <ListEmployee employee={item} navigation={this.props.navigation} />;
  }
  render() {
    return (
      <FlatList
      data={this.props.employees}
      renderItem={this.renderItem} // Only for test
      keyExtractor={this.keyExtractor}
      navigation={this.props.navigation}
      />
    );
  }
}
const mapStateToProps = (state) => {
  const employees = _.map(state.employees, (val, uid) => ({ ...val, uid }));
  return { employees };
};

export default connect(mapStateToProps, { employeesFetch })(EmployeeList);

这是 ListEmployee 的代码

Here's the code for ListEmployee

import React, { Component } from 'react';
import {
  Text,
  StyleSheet,
  TouchableWithoutFeedback,
  View
} from 'react-native';
import { CardSection } from './common';

class ListEmployee extends Component {

  render() {
  const { employee } = this.props;
  const { navigate } = this.props.navigation;
  const { textStyle } = styles;
  const { name } = this.props.employee;
    return (
      <TouchableWithoutFeedback onPress={() => navigate('employeeEdit', { employee })}>
        <View>
          <CardSection>
            <Text style={textStyle}>{name}</Text>
          </CardSection>
        </View>
      </TouchableWithoutFeedback>
    );
  }
}

/**
 second argument in connect does 2 things. 1.  dispatches all actions creators
return action objects to the store to be used by reducers; 2. creates props
of action creators to be used by components
**/
export default ListEmployee;

const styles = StyleSheet.create({
  textStyle: {
    fontSize: 18,
    paddingLeft: 15,
  }
});

推荐答案

在你的 renderItem 方法中，你可以管理当用户按下你的 FlatList 的一个项目时会发生什么:

Inside your renderItem method, you can manage what happens when the user presses one an item of your FlatList:

renderItem({ item }) {
    <TouchableOpacity onPress={() => { this.props.navigator.push({id: 'employeeEdit'})}} >
        <ListEmployee employee={item} navigation={this.props.navigation} />
    </TouchableOpacity>
}

希望对你有帮助！

这篇关于反应原生 Flatlist 导航的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！