React Native交互组件之Touchable:只要在组件外面包一个Touchable组件就可以实现点击交互。
TouchableHighlight:高亮触摸
当点击时,组件的透明度会改变,可以看到点击效果,TouchableHighlight只可以进行嵌套一层。其常用属性如下:
activeOpacity 点击时,组件的透明度。0-1
onHideUnderlay 当底层被隐藏时调用
onShowUnderlay 当底层显示时调用
style 风格
underlayColor 当点击组件时显示的颜色
TouchableOpacity:不透明触摸
activeOpacity 点击时,组件的透明度。0-1
常用的点击事件如下:
/** * Sample React Native App * https://github.com/facebook/react-native * 周少停 Touchable交互 * 2016-09-19 */ import React, { Component } from 'react'; import { AppRegistry, StyleSheet, Text, View, TouchableOpacity, AlertIOS } from 'react-native'; class Project extends Component { render() { return ( <View style={styles.container}> <TouchableOpacity activeOpacity={0.5} // onPress = {()=>this.activeEvent('点击')} // onPressIn = {()=>this.activeEvent('按下')} // onPressOut = {()=>this.activeEvent('抬起')} onLongPress = {()=>this.activeEvent("长按")} > <View style={styles.innerViewStyle}> <Text>我是可以点击的一个Text文本</Text> </View> </TouchableOpacity> </View> ); } activeEvent(event){ AlertIOS.alert(event); } } const styles = StyleSheet.create({ container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#F5FCFF', }, innerViewStyle: { backgroundColor: 'red', } }); AppRegistry.registerComponent('Project', () => Project);
获取屏幕属性:
/** * Sample React Native App * https://github.com/facebook/react-native * 周少停 2016-09-12 */ import React, { Component } from 'react'; import { AppRegistry, StyleSheet, Text, View } from 'react-native'; //引入 var Dimensions = require('Dimensions') class Project extends Component { render() { return ( <View style={styles.container}> <Text>当前屏幕的宽度:{Dimensions.get('window').width}</Text> <Text>当前屏幕的高度:{Dimensions.get('window').height}</Text> <Text>当前屏幕的分辨率:{Dimensions.get('window').scale}</Text> </View> ); } } const styles = StyleSheet.create({ container: { flex: 1, //充满全屏 justifyContent: 'center',//主轴对齐方式 alignItems: 'center',//侧轴对齐方式 backgroundColor: '#F5FCFF', //背景色 } }); AppRegistry.registerComponent('Project', () => Project);