前端之家收集整理的这篇文章主要介绍了
React Native 之View组件的回调,
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/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/
import React,{ Component } from 'react';
import {
AppRegistry,StyleSheet,Text,View
} from 'react-native';
export default class ViewProject extends Component {
render() {
return (
<View style={styles.container}
onTouchStart={this._onTouchStart}
onTouchMove={this._onTouchMove}
onTouchEnd={this._onTouchEnd}
>
</View>
);
}
_onTouchMove(event){
console.log("touch move:"+event.timeStamp+",X:"+event.nativeEvent.locationX+",Y:"+event.nativeEvent.locationY);
}
_onTouchStart(event){
console.log("touch start:"+event.timeStamp+",Y:"+event.nativeEvent.locationY);
}
_onTouchEnd(event){
console.log("touch end:"+event.timeStamp+",Y:"+event.nativeEvent.locationY);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,backgroundColor:"#F5FCFF",}
});
AppRegistry.registerComponent('ViewProject',() => ViewProject);
@H_
301_4@在React Native 开发中,通常在最上层的组件中(render
函数靠后渲染的组件)处理触摸事件,但这三个回调
函数总能收到事件,而不管
用户当前触摸区域是空白的,还是其它组件以及处理了触摸事件。