initialize static method

void initialize({
  1. double standardSize = 750,
})

Implementation

static void initialize({double standardSize = 750}) {

  //1、手机的物理分辨率
  physicalWidth = window.physicalSize.width;
  physicalHeight = window.physicalSize.height;

  //2、获取dpr
  dpr = window.devicePixelRatio;

  //3、获取手机屏幕的大小（逻辑分辨率）
  screenWidth = physicalWidth/dpr;
  screenHeight = physicalHeight/dpr;

  //4、状态栏高度
  statusHeight = window.padding.top/dpr;
  bottomHeight = window.padding.bottom/dpr;

  //5、计算rpx的大小
  rpx = screenWidth/standardSize;

  px =  screenWidth / standardSize * 2;
}