参数同时支持传入 int / double 或者是var size = 100 , var size = 100.0

example/lib/main_zh.dart

@@ -48,7 +48,7 @@ class _MyHomePageState extends State<MyHomePage> {
     print(
         '高度相对于设计稿放大的比例:${ScreenUtil.getInstance().scaleHeight * ScreenUtil.pixelRatio}');
     print('系统的字体缩放比例:${ScreenUtil.textScaleFactory}');
-
+  
     return Scaffold(
       appBar: AppBar(
         title: Text(widget.title),

lib/flutter_screenutil.dart

@@ -93,7 +93,7 @@ class ScreenUtil {
   /// Adapted to the device width of the UI Design.
   /// Height can also be adapted according to this to ensure no deformation ,
   /// if you want a square
-  setWidth(double width) => width * scaleWidth;
+  setWidth(num width) => width * scaleWidth;
 
   /// 根据UI设计的设备高度适配
   /// 当发现UI设计中的一屏显示的与当前样式效果不符合时,
@@ -103,14 +103,14 @@ class ScreenUtil {
   /// It is recommended to use this method to achieve a high degree of adaptation
   /// when it is found that one screen in the UI design
   /// does not match the current style effect, or if there is a difference in shape.
-  setHeight(double height) => height * scaleHeight;
+  setHeight(num height) => height * scaleHeight;
 
   ///字体大小适配方法
   ///@param [fontSize] UI设计上字体的大小,单位px.
   ///Font size adaptation method
   ///@param [fontSize] The size of the font on the UI design, in px.
   ///@param [allowFontScaling]
-  setSp(double fontSize) => allowFontScaling
+  setSp(num fontSize) => allowFontScaling
       ? setWidth(fontSize)
       : setWidth(fontSize) / _textScaleFactor;
 }