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react-navigation use case analysis

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Jun 01, 2018 am 10:42 AM

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This time I will bring you an analysis of react-navigation use cases. What are the precautions when using react-navigation? The following is a practical case, let’s take a look.

1. Main components

It is mainly divided into three parts according to the usage form:

StackNavigator: Similar to an ordinary Navigator, the navigation bar at the top of the screen
TabNavigator: is equivalent to the TabBarController in ios, and the tab bar at the bottom of the screen
DrawerNavigator: Drawer effect, slide out from the side

2. Use

1. Create a new project

1	`react-native init ComponentDemo`

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2. Install this library in the application

1	`npm install --save react-navigation`

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After installation, I found that it is a beta version (v1.0.0-beta.7), but there is a pitfall?! We will talk about this pitfall in detail in a moment~

3. Test TabNavigator, StackNavigator and DrawerNavigator

(1) Create a new HomePage.js

import React from 'react';
import {
  StyleSheet,
  View,
  Text,
  Button,
  Image
} from 'react-native';
import {
  StackNavigator,
  TabNavigator
} from 'react-navigation';
import ChatScreen from './ChatScreen';
import MinePage from './MinePage';
class HomePage extends React.Component{
  static navigationOptions={
    title: '首页',//设置标题内容
    header:{
      backTitle: ' ',//返回按钮标题内容（默认为上一级标题内容）
    }
  }
  constructor(props) {
    super(props);
  }
  render() {
    const {navigate} = this.props.navigation;
    return (
      <View style={styles.container}>
        <Text style={{padding:10}}>Hello, Navigation!</Text>
        <Button
          onPress={() => navigate('Chat',{user:'Sybil'})}
          title="点击跳转"/>
      </View>
    )
  }
}
const MainScreenNavigator = TabNavigator({
  Home: {
    screen: HomePage,
    navigationOptions: {
      tabBar: {
        label: '首页',
        icon: ({tintColor}) => (
          <Image
            source={require(&#39;./image/bar_home_nomarl@3x.png&#39;)}
            style={[{tintColor: tintColor},styles.icon]}
          />
        ),
      },
    }
  },
  Certificate: {
    screen: MinePage,
    navigationOptions: {
      tabBar: {
        label: '我的',
        icon: ({tintColor}) => (
          <Image
            source={require(&#39;./image/bar_center_normal@3x.png&#39;)}
            style={[{tintColor: tintColor},styles.icon]}
          />
        ),
      },
    }
  },
}, {
  animationEnabled: false, // 切换页面时不显示动画
  tabBarPosition: 'bottom', // 显示在底端，android 默认是显示在页面顶端的
  swipeEnabled: false, // 禁止左右滑动
  backBehavior: 'none', // 按 back 键是否跳转到第一个 Tab， none 为不跳转
  tabBarOptions: {
    activeTintColor: '#008AC9', // 文字和图片选中颜色
    inactiveTintColor: '#999', // 文字和图片默认颜色
    showIcon: true, // android 默认不显示 icon, 需要设置为 true 才会显示
    indicatorStyle: {height: 0}, // android 中TabBar下面会显示一条线，高度设为 0 后就不显示线了
    style: {
      backgroundColor: '#fff', // TabBar 背景色
    },
    labelStyle: {
      fontSize: 12, // 文字大小
    },
  },
});
const styles = StyleSheet.create({
  container:{
    flex: 1,
    backgroundColor:'#fff'
  },
  icon: {
    height: 22,
    width: 22,
    resizeMode: 'contain'
  }
});
const SimpleApp = StackNavigator({
  Home: {screen: MainScreenNavigator},
  Chat:{screen:ChatScreen},
});
export default SimpleApp;

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(2) Create a new ChatScreen.js

import React from 'react';
import {
  Button,
  Image,
  View,
  Text
} from 'react-native';
class ChatScreen extends React.Component {
  static navigationOptions = {
    title:'聊天',
  };
  render() {
    const {params} = this.props.navigation.state;
    return (
    <View style={{backgroundColor:&#39;#fff&#39;,flex:1}}>
      <Text style={{padding:20}}>Chat with {params.user}</Text>
    </View>
    );
  }
}
export default ChatScreen;

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(3) Create a new MinePage.js

import React,{Component} from 'react';
import {
  Button,
  Image,
  View,
  Text,
  StyleSheet
} from 'react-native';
import {
  DrawerNavigator
} from 'react-navigation';
import MyNotificationsScreen from './MyNotificationsScreen';
class MinePage extends Component{
  static navigationOptions = {
     title:'我的',
     drawerLabel: '我的',
    // Note: By default the icon is only shown on iOS. Search the showIcon option below.
     drawerIcon: ({ tintColor }) => (
     <Image
       source={require(&#39;./image/chat@3x.png&#39;)}
      style={[styles.icon, {tintColor: tintColor}]}
     />
   ),
  };
  render(){;
    return(
      <View style={{backgroundColor:&#39;#fff&#39;,flex:1}}>
        <Text style={{padding:20}}>Sybil</Text>
        <Button
         style={{padding:20}}
         onPress={() => this.props.navigation.navigate('DrawerOpen')}
         title="点击打开侧滑菜单"
        />
      </View>
    );
  }
}
const styles = StyleSheet.create({
  icon: {
    width: 24,
    height: 24,
  },
});
const MyChatNavigator = DrawerNavigator({
  MyChat: {
    screen: MinePage,
  },
  Notifications: {
    screen: MyNotificationsScreen,
  },
},{
  drawerWidth: 220, // 抽屉宽
  drawerPosition: 'left', // 抽屉在左边还是右边
  // contentComponent: CustomDrawerContentComponent, // 自定义抽屉组件
  contentOptions: {
    initialRouteName: MinePage, // 默认页面组件
    activeTintColor: '#008AC9', // 选中文字颜色
    activeBackgroundColor: '#f5f5f5', // 选中背景颜色
    inactiveTintColor: '#000', // 未选中文字颜色
    inactiveBackgroundColor: '#fff', // 未选中背景颜色
    style: { // 样式
    }
  }
});
export default MyChatNavigator;

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(4) Write MyNotificationsScreen.js

import React from 'react';
import {
  StyleSheet,
  View,
  Text,
  Button,
  Image
} from 'react-native';
class MyNotificationsScreen extends React.Component {
  static navigationOptions = {
    title:'通知',
    drawerLabel: '通知',
    drawerIcon: ({ tintColor }) => (
      <Image
        source={require(&#39;./image/notif@3x.png&#39;)}
        style={[styles.tabIcon, {tintColor: tintColor}]}
      />
    ),
  };
  render() {
    return (
       <View style={{backgroundColor:&#39;#fff&#39;}}>
        <Button
          style={{padding:20}}
          onPress={() => this.props.navigation.navigate('DrawerOpen')}
          title="点击打开侧滑菜单"
        />
        <Button
          onPress={() => this.props.navigation.goBack()}
          title="返回我的界面"
        />
      </View>
    );
  }
}
const styles = StyleSheet.create({
  tabIcon: {
    width: 24,
    height: 24,
  },
});
export default MyNotificationsScreen;

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(5) Run

and report an error? This is the pit we mentioned above~

What is the reason? It turns out to be a bug in the beta version. Find line 12 of node_modules/react-navigation/src/views/Header.js in the directory. Delete it and it will be OK~

Ps: Unfortunately, I don’t have this error. Leave a picture~ When I am about to publish this article, the latest version has changed to (v1.0.0-beta.9), and the latest version has modified the above bug!

Okay, run it again~

Last dynamic rendering:

I believe you have mastered the method after reading the case in this article. For more exciting content, please pay attention to other related articles on the php Chinese website!

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