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项目简介
最近一直在研究RN技术，想着找个项目练练手，之前就有使用vue、react技术开发过聊天项目，这次就使用reactNative技术开发个仿微信RN版。是基于 react-native+react-navigation+react-redux+react-native-image-picker+rnPop 等技术实现开发的仿微信原生APP聊天项目，该项目从搭建到开发完 花了半个月，主要是白天太忙，只能晚上抽时间弄，开发过程采坑不少，不过通过一些技术论坛把问题都一 一撸顺了。
 
技术选择
RN脚手架：react / react-native / react-native-cli状态管理：react-redux页面导航：react-navigationrn 弹窗组件：rnPop打包工具：webpack 2.0轮播组件：react-native-swiper图片 /相册：react-native-image-picker
{
"name": "RN_ChatRoom",
"aboutMe": "QQ：282310962",
"dependencies": {
"react": "16.8.6",
"react-native": "0.60.4"
},
"devDependencies": {
"@babel/core": "^7.5.5",
"@babel/runtime": "^7.5.5",
"@react-native-community/async-storage": "^1.6.1",
"@react-native-community/eslint-config": "^0.0.5",
"babel-jest": "^24.8.0",
"eslint": "^6.1.0",
"jest": "^24.8.0",
"metro-react-native-babel-preset": "^0.55.0",
"react-native-gesture-handler": "^1.3.0",
"react-native-image-picker": "^1.0.2",
"react-native-swiper": "^1.5.14",
"react-navigation": "^3.11.1",
"react-redux": "^7.1.0",
"react-test-renderer": "16.8.6",
"redux": "^4.0.4",
"redux-thunk": "^2.3.0"
}
}
 
 
 
 
 
 
RN中写公共样式
新建common.js公共样式库，通过react native中提供的global全局变量，在app.js中一次引入，然后所有页面均可以调用。
global.GStyle = {
pixel: 1 / PixelRatio.get(),
// 边框
borT: {borderTopWidth: 1 / PixelRatio.get(), borderTopColor: '#dedede',},
borB: {borderBottomWidth: 1 / PixelRatio.get(), borderBottomColor: '#dedede',},
/* __ 布局控制 */
align_l: {textAlign: 'left'},
align_c: {textAlign: 'center'},
align_r: {textAlign: 'right'},
pos_rel: {position: 'relative'},
pos_abs: {position: 'absolute'},
/* __ 颜色（背景、文字） */
bg_fff: {backgroundColor: '#fff'},
bg_45cff5: {backgroundColor: '#45cff5'},
c_fff: {color: '#fff'},
c_999: {color: '#999'},
c_45cff5: {color: '#45cff5'},
/* __ 字号 */
fs_14: {fontSize: 14},
fs_16: {fontSize: 16},
fs_20: {fontSize: 20},
fs_24: {fontSize: 24},
/* __ 字体 */
ff_ic: {fontFamily: 'iconfont'},
ff_ar: {fontFamily: 'arial'},
iconfont: {fontFamily: 'iconfont', fontSize: 16,},
/* __ 间距（ 5/10/15/20/25/30/50 ） */
mt_10: {marginTop: 10}, mt_15: {marginTop: 15}, mt_20: {marginTop: 20},
mb_10: {marginBottom: 10}, mb_15: {marginBottom: 15}, mb_20: {marginBottom: 20},
/* __ 行高 */
lh_20: {lineHeight: 20},
lh_25: {lineHeight: 25},
lh_30: {lineHeight: 30},
lh_35: {lineHeight: 35},
lh_40: {lineHeight: 40},
flex1: {flex: 1},
flex2: {flex: 2},
flex_alignC: {alignItems: 'center'},
flex_alignT: {alignItems: 'flex-start'},
flex_alignB: {alignItems: 'flex-end'},
}
RN实现app全屏启动制作
react native实现沉浸式效果(类似京东、淘宝首页顶部)，只需把 StatusBar 设置为透明，这样状态栏和背景页面一体了。
export default class Splash extends Component{
constructor(props){
super(props)
this.state = {
animFadeOut: new Animated.Value(1),
}
}
render(){
return (
{color: '#dbdbdb', fontSize: 12, textAlign: 'center',}}>RN-ChatRoom v1.0.0
)
}
componentDidMount(){
storage.get('hasLogin', (err, object) => {
setTimeout(() => {
Animated.timing(
this.state.animFadeOut, {duration: 300, toValue: 0}
).start(()=>{
this.props.navigation.navigate('Index')
})
}, 1500);
})
}
}
RN自定义顶部条headerBar
react-navigation自带的顶部导航栏一般能满足项目需求，可是一些特殊自定义化的项目，就只能自己定制开发了。如是基于react-navigation做了个自定义顶部导航组件。
支持多种属性配置，调用十分方便，
export default class HeaderBar extends Component {
constructor(props){
super(props)
this.state = {
searchInput: ''
}
}
render() {
/**
* 更新
* @param { navigation | 页面导航 }
* @param { title | 标题 }
* @param { center | 标题是否居中 }
* @param { search | 是否显示搜索 }
* @param { headerRight | 右侧 Icon 按钮 }
*/
let{ navigation, title, bg, center, search, headerRight } = this.props
return (
{/* 返回 */}
{/* 标题 */}
{ !search && center ? : null }
{
search ?
(
{this.setState({searchInput: text})}} style={styles.barSearchText} placeholder='搜索' placeholderTextColor='rgba(255,255,255,.6)' />
)
:
(
{ title ? {title} : null }
)
}
{/* 右侧 */}
{
!headerRight ? null : headerRight.map((item, index) => {
return(
item.press ? item.press(this.state.searchInput) : null}>
{
item.type === 'iconfont' ? item.title : (
typeof item.title === 'string' ?
{`${item.title}`}
:
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