富贵资源网 Design By www.hznty.com
本文介绍了react-navigation之动态修改title的内容,分享给大家,具体如下:
效果图:
动态修改title内容:
static navigationOptions = { title: ({ state }) => `Chat with ${state.params.user}` };
ps:`Chat with ${state.params.user}` 这里有个注意的地方,是这个符号·而不是单引号‘
index.android.js
/** * Sample React Native App * https://github.com/facebook/react-native * @flow */ import { AppRegistry, }from 'react-native'; import rootApp from './js/rootApp' AppRegistry.registerComponent('GankProject', () = >rootApp);
rootApp.js:
/** * Created by Administrator on 2017/3/31 0031. */ 'use strict'import React from 'react'; import { AppRegistry, Text, View, Button, } from 'react-native'; import { StackNavigator } from 'react-navigation'; import ChatScreen from './ChatScreen'; class HomeScreen extends React.Component { static navigationOptions = { title: 'Welcome', //设置标题内容 }; render() { const { navigate } = this.props.navigation; return ( < View > <Text > Hello, Navigation ! </Text> <Button onPress={() => navigate('Chat',{user:'Lucy'})} title="Chat with Lucy"/ > </View> ); } } const SimpleApp = StackNavigator( { Home: {screen: HomeScreen}, Chat:{screen:ChatScreen}, } ); export default SimpleApp;
ChatScreen.js:
/** * Created by Administrator on 2017/3/31 0031. */ 'use strict' import React,{Component}from 'react'; import {View,Text}from 'react-native'; class ChatScreen extends Component { static navigationOptions = { title: ({state}) = >`Chat with $ {state.params.user}` }; render() { const {params} = this.props.navigation.state; return ( < View > <Text > Chat with { params.user } < /Text> </View > ); } } export default ChatScreen;
效果2:
/** * Created by Administrator on 2017/3/31 0031. */ 'use strict' import React, { Component}from 'react'; import {View, Text, Button}from 'react-native'; class ChatScreen extends Component { static navigationOptions = { title: ({ state }) => { if (state.params.mode === 'info') { return `${state.params.user}'s Contact Info`; } return `Chat with ${state.params.user}`; }, header: ({state, setParams}) => { // The navigation prop has functions like setParams, goBack, and navigate. let right = ( < Button title = { `${state.params.user}'s info` } onPress = { () => setParams({ mode: 'info' }) } /> ); if (state.params.mode === 'info') { right = ( <Button title="Done" onPress={() => setParams({ mode: 'none' })} / > ); } return {right}; }, }; render() { const { params } = this.props.navigation.state; return ( < View > < Text > Chat with {params.user} < /Text> </View > ); } } export default ChatScreen;
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
富贵资源网 Design By www.hznty.com
广告合作:本站广告合作请联系QQ:858582 申请时备注:广告合作(否则不回)
免责声明:本站资源来自互联网收集,仅供用于学习和交流,请遵循相关法律法规,本站一切资源不代表本站立场,如有侵权、后门、不妥请联系本站删除!
免责声明:本站资源来自互联网收集,仅供用于学习和交流,请遵循相关法律法规,本站一切资源不代表本站立场,如有侵权、后门、不妥请联系本站删除!
富贵资源网 Design By www.hznty.com
暂无评论...
RTX 5090要首发 性能要翻倍!三星展示GDDR7显存
三星在GTC上展示了专为下一代游戏GPU设计的GDDR7内存。
首次推出的GDDR7内存模块密度为16GB,每个模块容量为2GB。其速度预设为32 Gbps(PAM3),但也可以降至28 Gbps,以提高产量和初始阶段的整体性能和成本效益。
据三星表示,GDDR7内存的能效将提高20%,同时工作电压仅为1.1V,低于标准的1.2V。通过采用更新的封装材料和优化的电路设计,使得在高速运行时的发热量降低,GDDR7的热阻比GDDR6降低了70%。