react-native底部导航栏实现

1. react-native-tab-navigator实现：

　　　　bottom.js代码如下：

　　　　

import React, {Component} from 'react';
import {StyleSheet, View,Text,Image} from 'react-native';
import TabNavigator from 'react-native-tab-navigator'

export default class Bottom extends Component {
  /*初始化state*/
  constructor(props){
      super();
      this.state={
        selectedTab:'tb_msg',
      }
  }
    /**
     * 公共组件方法
     * @param selectedTab 选中的tab
     * @param title
     * @param icon
     * @param selectedIcon
     * @param imageStyle  选中时渲染图标的颜色
     * @param mark  角标
     * @param viewContent  页面内容
     * @returns {*}
     */
  tabNavigatorItems(selectedTab,title,icon,selectedIcon,imageStyle,mark,viewContent){
      return (
          <TabNavigator.Item
              selected={this.state.selectedTab === selectedTab }
              title={title}
              renderIcon={()=> <Image style={styles.myImage} source={icon}/> }
              renderSelectedIcon={()=> <Image style={[styles.myImage,{tintColor:imageStyle}]} source={selectedIcon}/> }
              badgeText={mark}
              onPress={()=> this.setState({selectedTab:selectedTab}) }>
              <View style={{flex:1}}><Text>{viewContent}</Text></View>
          </TabNavigator.Item>
      )
  }

  render() {
    return (
      <View style={styles.container}>
         <TabNavigator>
            {this.tabNavigatorItems('tb_msg',"消息",require('../../assets/img/zhuye.png'),require("../../assets/img/zhuyesl.png"),'#622193',"","消息页面内容")}
            {this.tabNavigatorItems('tb_contacts',"联系人",require('../../assets/img/zhuye.png'),require("../../assets/img/zhuye.png"),'#65bb74',"","联系人页面内容")}
            {this.tabNavigatorItems('tb_watch',"看点",require('../../assets/img/zhuye.png'),require("../../assets/img/zhuye.png"),'#6ebef3',"","看点页面内容")}
            {this.tabNavigatorItems('tb_dynamic',"动态",require('../../assets/img/zhuye.png'),require("../../assets/img/zhuye.png"),'#622193',"","动态页面内容")}
         </TabNavigator>
      </View>
    );
  }
}

const styles = StyleSheet.create({
    container: {
        flex: 1,
        backgroundColor: '#F5FCFF',
    },
    myImage:{
        width:22,
        height:22,
    }

});

运行：react-native run-android

　运行结果：

　　

方法二：

import React, { Component } from 'react';
import {
  Platform,
  StyleSheet,
  Text,
  View,
  Image
} from 'react-native';
import TabNavigator from 'react-native-tab-navigator';

import Home from './component/bottom/home';
import Article from './component/bottom/article';
import Order from './component/bottom/order';
import Owner from './component/bottom/owner';

const dataSource = [
                    {icon:require('./assets/img/zhuye.png'),selectedIcon:require('./assets/img/zhuyesl.png'),tabPage:'Home',tabName:'首页',component:Home},
                    {icon:require('./assets/img/zhuye.png'),selectedIcon:require('./assets/img/zhuyesl.png'),tabPage:'Article',tabName:'文章',component:Article},
                    {icon:require('./assets/img/zhuye.png'),selectedIcon:require('./assets/img/zhuyesl.png'),tabPage:'Order',tabName:'订单',component:Order},
                    {icon:require('./assets/img/zhuye.png'),selectedIcon:require('./assets/img/zhuyesl.png'),tabPage:'Owner',tabName:'我的',component:Owner}
                 ]
var navigation = null;
type Props = {};
export default class App extends Component<Props> {
  constructor(props){
    super(props);
    navigation = this.props.navigation;
    this.state = {
      selectedTab:'Home'
    }
  }

  render() {
    let tabViews = dataSource.map((item,i) => {
      return (
          <TabNavigator.Item
            title={item.tabName}
            selected={this.state.selectedTab===item.tabPage}
            titleStyle={{color:'black'}}
            selectedTitleStyle={{color:'#7A16BD'}}
            renderIcon={()=><Image style={styles.tabIcon} source={item.icon}/>}
            renderSelectedIcon = {() => <Image style={styles.tabIcon} source={item.selectedIcon}/>}
            tabStyle={{alignSelf:'center'}}
            onPress = {() => {this.setState({selectedTab:item.tabPage})}}
            key={i}
            >
            <item.component  navigation={navigation}/>
        </TabNavigator.Item>
      );
    })
    return (
      <View style={styles.container}>
        <TabNavigator
          hidesTabTouch={true}
          >
            {tabViews}
        </TabNavigator>
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#F5FCFF',
  },
  tabIcon:{
    width:23,
    height:23,
  }
});

出现问题1：

　　黄色警告

　　　　解决方法：

　　　　index.js文件中，放在AppRegistry.registerComponent('App', () => App)之前即可

　　　　console.ignoredYellowBox = ['Warning: BackAndroid is deprecated. Please use BackHandler instead.','source.uri should not be an empty string','Invalid props.style key'];

　　　　console.disableYellowBox = true // 关闭全部黄色警告