efunbox-mobile-8/pages/utils/dimensions.js

let {Dimensions,StatusBar,Platform,PixelRatio} = require('react-native');
let {width,scale,height,fontScale} = Dimensions.get("window");
let isIOS = Platform.OS == "ios";
let statusBarHeight = isIOS? 20: StatusBar.currentHeight;
let pixelRatio = PixelRatio;
fontScale = scale;
const widthScale = width / 375;
const heightScale = height / 667;
/* 
* 设计稿元素宽度（px） / 设计稿总宽度（px） = 元素的宽度（dp） / 屏幕的总宽度（dp）
*/
export default Dimensions  = {
	get:Dimensions.get,
	screenWidth:width,
	screenHeight:height,
	screenScale:scale,
	width:width,
	height:height,
	scale:scale,
	fontScale:fontScale,
	statusBarHeight:statusBarHeight,
	contentHeight:height-statusBarHeight,
	pixelRatio: pixelRatio,
	getFontSize:function(size){
		return size*fontScale;
	},
	getWidth:function(px){
		return  width * px /375;
	},
	getHeight:function(px){
		return width / 375 * px ;
	},
	/* px转dp */
	getDp: px => PixelRatio.roundToNearestPixel(px),
	size:{
		"1":1*fontScale
	}
}