getWidthPx method
仅支持纵屏 returns the size after adaptation according to the screen width.(unit dp or pt) 返回根据屏幕宽适配后尺寸(单位 dp or pt) sizePx unit px
Implementation
double getWidthPx(double sizePx) {
return _screenWidth == 0.0
? (sizePx / _designD)
: (sizePx * _screenWidth / (_designW * _designD));
}