@icanvas/apis/libs/system.js

这是icanvas的Api功能包

/**
 * 获取系统参数
 * pixel 屏幕与设备像素比
 * width 屏幕宽度
 * height 屏幕高度
 * ratio 宽高比
 */
let System = function() {
	if (ENV.core == 'wxgame') {
		System.wx = wx.getSystemInfoSync();
		System.pixel = System.wx.pixelRatio;
		System.width = System.wx.screenWidth * System.pixel;
		System.height = System.wx.screenHeight * System.pixel;
	} else {
		System.pixel = window.devicePixelRatio || 2;
		System.width = document.body.clientWidth * System.pixel;
		System.height = document.body.clientHeight * System.pixel;
	}
	System.ratio = System.width / System.height;
};
export default System;
System(); //初始化立即执行一次