runApp(
 ScreenUtilInit(
 designSize: const Size(375, 812),
 minTextAdapt: true,
 splitScreenMode: true,
 builder: (context, child) {
 ScreenUtil.init(context);
 return const MyApp();
 },
 ),
 );
 Text(
 //ScreenUtil().screenWidth = 430
 '屏幕宽度: ${ScreenUtil().screenWidth}',
 style: TextStyle(fontSize: 14.sp),
 ),
 BetterButton(
 text: '375.w = ${375.w}',
 type: BetterButtonType.primary,
 loadingText: "加载中...".tr,
 height: 44.w,
 width: 375.w,
 ),