added support for split screen in mobile devices

 #!/bin/sh
 # This is a generated file; do not edit or check into version control.
-export "FLUTTER_ROOT=/Users/lizhuoyuan/Development/flutter"
-export "FLUTTER_APPLICATION_PATH=/Users/lizhuoyuan/Development/Project/flutter_screenutil/example"
+export "FLUTTER_ROOT=C:\flutter"
+export "FLUTTER_APPLICATION_PATH=C:\Users\Avnish\Downloads\flutter_screenutil\example"
 export "COCOAPODS_PARALLEL_CODE_SIGN=true"
-export "FLUTTER_TARGET=lib/main.dart"
+export "FLUTTER_TARGET=lib\main.dart"
 export "FLUTTER_BUILD_DIR=build"
-export "SYMROOT=${SOURCE_ROOT}/../build/ios"
 export "FLUTTER_BUILD_NAME=1.0.0"
 export "FLUTTER_BUILD_NUMBER=1"
 export "DART_OBFUSCATION=false"

@@ -12,16 +12,21 @@ class ScreenUtilInit extends StatelessWidget {
 
   /// The [Size] of the device in the design draft, in dp
   final Size designSize;
+  BoxConstraints constraints1 = BoxConstraints(maxHeight: 0.0);
 
   @override
   Widget build(BuildContext context) {
     return LayoutBuilder(builder: (_, BoxConstraints constraints) {
-      if (constraints.maxWidth != 0) {
-        final Orientation orientation = constraints.maxWidth > constraints.maxHeight
+      if (constraints.maxHeight > constraints1.maxHeight) {
+        constraints1 = constraints;
+      }
+      if (constraints1.maxWidth != 0) {
+        final Orientation orientation =
+            constraints1.maxWidth > constraints1.maxHeight
                 ? Orientation.landscape
                 : Orientation.portrait;
         ScreenUtil.init(
-          constraints,
+          constraints1,
           orientation: orientation,
           designSize: designSize,
         );