React-Native学习之制作RN版的微博app(一)
前面我们学习了react-native-router-flux，接下来我们将使用其搭建微博主界面
react_native_router_flux_使用详解一.php
react_native_router_flux_使用详解二.php
react_native_router_flux_使用详解三.php
第一步先来个简单的主页面切换
先上效果图：
源码已上传码云：https://git.oschina.net/osczaizai/RNWeiBo
根据前面的学习，我们在本项目中通过npm将react-native-router-flux安装到RNWeibo中，
npm i react-native-router-flux --save
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/
'use strict';
import React, {Component} from 'react';
import {
AppRegistry,
StyleSheet,
PixelRatio,
Dimensions,
Image,
Text,
View,
Platform
} from 'react-native';
import {
Scene,
Reducer,
Router,
Modal,
Actions,
ActionConst
}from'react-native-router-flux';
import HomeView from './pages/home';
import PublishView from './pages/publish';
import ProfileView from './pages/profile';
import MessageView from './pages/message';
import DiscroverView from './pages/discrover';
import TabIcon from './components/TabIcon';
import Error from './components/Error';
const px = 1 / PixelRatio.get();
const screentWidth = Dimensions.get('window').width;
const screentHeight = Dimensions.get('window').height;
var statusBarHeight = Platform.OS == 'android' ? 25 : 0;
var postButtonWidth = 40;
var postButtonHeight = 40;
var tabbarHeight = 60;
/**
* 包装reducer构造函数返回一个闭包
* @param params
* @returns {function(*=, *=)}
*/
const reducerCreate = (params) => {
const defaultReducer = new Reducer(params);
return (state, action) => {
console.log('ACTION:', action);
return defaultReducer(state, action);
}
};
/**
* 定义基本的样式
* @param props
* @param computedProps
* @returns {{flex: number, backgroundColor: string, shadowColor: null, shadowOffset: null, shadowOpacity: null, shadowRadius: null}}
*/
const getSceneStyle = (props, computedProps) => {
const style = {
flex: 1,
backgroundColor: '#fff',
shadowColor: null,
shadowOffset: null,
shadowOpacity: null,
shadowRadius: null,
};
if (computedProps.isActive) {
console.log(computedProps)
style.marginTop = computedProps.hideNavBar ? 0 : 64;
style.marginBottom = computedProps.hideTabBar ? 0 : 50;
}
return style;
};
export default class RootView extends Component {
// 构造
constructor(props) {
super(props);
// 初始状态
this.state = {
selectedTab: 'home',
};
}
render() {
return (
component={Modal}>
key="main"
tabs={true}
hideNavBar={false}
tabBarStyle={styles.tabBarStyle}>
key="home"
title="Home title"
hideNavBar={false}
tabTitle="微博"
component={HomeView}
initial={true}
icon={TabIcon}
/>
key="message"
hideNavBar={false}
tabTitle="信息"
title="Message title"
component={MessageView}
icon={TabIcon}
/>
key="tabbarpublish"
tabTitle="发布"
title=" title"
component={PublishView}
icon={TabIcon}
/>
key="discrover"
tabTitle="发现"
hideNavBar={false}
title="Discrover title"
component={DiscroverView}
icon={TabIcon}
/>
key="profile"
title="Profile title"
tabTitle="我的"
hideNavBar={false}
component={ProfileView}
icon={TabIcon}
/>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
},
tab_image: {
height: 28,
width: 28,
},
tabBarStyle: {
borderTopWidth: 0.5,
borderColor: '#b7b7b7',
backgroundColor: 'white',
opacity: 1
},
post: {
width: postButtonWidth,
height: postButtonHeight,
backgroundColor: 'red',
top: screentHeight - tabbarHeight - statusBarHeight + ((tabbarHeight - postButtonHeight) / 2),
left: (screentWidth - postButtonWidth) / 2,
position: 'absolute',
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5
}
});
后面将继续学习RN技术，欢迎一起探讨学习
