React-native 獲取螢幕寬度/高度/畫素
/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
* [email protected]
* 說明:專案名為Demo1
* 檔名:Main.js(注意引用)
*/
import React, { Component } from ‘react’;
//註冊一下,你要用什麼元件
import {
AppRegistry,
StyleSheet,
PixelRatio,
Text,
View
} from ‘react-native’;
//獲取
var Dimensions = require(“Dimensions”);
//var width = Dimensions.get(‘window’).width;
//var height= Dimensions.get(‘window’).height;
var {width, height} = Dimensions.get(‘window’);
var pi = PixelRatio.get();
export default class Demo1 extends Component {
render() { return ( <View style={styles.container}> <Text> 我的螢幕寬度:{width},{'\n'} 我的螢幕高度:{height},{'\n'} 我的螢幕畫素:{pi} </Text> ); }
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: ‘center’,
alignItems: ‘center’,
backgroundColor: ‘#F5FCFF’,
flexDirection: ‘row’,
height: 100,
padding: 20
},
});
module.exports = Demo1;