update readme

@@ -49,15 +49,36 @@ class MyApp extends StatelessWidget {
     //Set the fit size (fill in the screen size of the device in the design,in dp)
     //Set the fit size (fill in the screen size of the device in the design,in dp)
     return ScreenUtilInit(
     return ScreenUtilInit(
       designSize: Size(360, 690),
       designSize: Size(360, 690),
-      allowFontScaling: false,
       builder: () => MaterialApp(
       builder: () => MaterialApp(
         ...
         ...
+        theme: ThemeData(
+                          primarySwatch: Colors.blue,
+                          textTheme: TextTheme(
+                          //To support the following, you need to use the first initialization method
+                            button: TextStyle(fontSize: 45.sp)
+                          ),
+                        ),
       ),
       ),
     );
     );
   }
   }
 }
 }
+
 ```
 ```
-The second way:Does not support the use of font adaptation in the App
+The second way:Does not support font adaptation in the textTheme of MaterialApp's theme.
+
+not support this:
+```dart
+MaterialApp(
+  ...
+  theme: ThemeData(
+           textTheme: TextTheme(
+             //To support the following, you need to use the first initialization method
+             button: TextStyle(fontSize: 45.sp)
+             ),
+           ),
+)
+```
+
 ```dart
 ```dart
 class MyApp extends StatelessWidget {
 class MyApp extends StatelessWidget {
   @override
   @override

@@ -55,20 +55,24 @@ class MyApp extends StatelessWidget {
     //填入设计稿中设备的屏幕尺寸,单位dp
     //填入设计稿中设备的屏幕尺寸,单位dp
     return ScreenUtilInit(
     return ScreenUtilInit(
       designSize: Size(360, 690),
       designSize: Size(360, 690),
-      allowFontScaling: false,
       builder: () => MaterialApp(
       builder: () => MaterialApp(
         debugShowCheckedModeBanner: false,
         debugShowCheckedModeBanner: false,
         title: 'Flutter_ScreenUtil',
         title: 'Flutter_ScreenUtil',
         theme: ThemeData(
         theme: ThemeData(
-          primarySwatch: Colors.blue,
-        ),
+                  primarySwatch: Colors.blue,
+                  //要支持下面这个需要使用第一种初始化方式
+                  textTheme: TextTheme(
+                    button: TextStyle(fontSize: 45.sp)
+                  ),
+                ),
         home: HomePage(title: 'FlutterScreenUtil Demo'),
         home: HomePage(title: 'FlutterScreenUtil Demo'),
       ),
       ),
     );
     );
   }
   }
 }
 }
 ```
 ```
-方式二: 不支持在App中使用字体适配
+
+方式二: 不支持在MaterialApp的theme的textTheme中使用字体适配
 ```
 ```
 class MyApp extends StatelessWidget {
 class MyApp extends StatelessWidget {
   @override
   @override

@@ -55,12 +55,20 @@ class MyApp extends StatelessWidget {
       designSize: Size(360, 690),
       designSize: Size(360, 690),
       builder: () => MaterialApp(
       builder: () => MaterialApp(
         ...
         ...
+        theme: ThemeData(
+                          primarySwatch: Colors.blue,
+                          //To support the following, you need to use the first initialization method
+                          textTheme: TextTheme(
+                            button: TextStyle(fontSize: 45.sp)
+                          ),
+                        ),
       ),
       ),
     );
     );
   }
   }
 }
 }
 ```
 ```
-The second way:Does not support the use of font adaptation in the App
+
+The second way:Does not support font adaptation in the textTheme of MaterialApp's theme.
 ```
 ```
 class MyApp extends StatelessWidget {
 class MyApp extends StatelessWidget {
   @override
   @override

@@ -5,9 +5,11 @@ export "FLUTTER_APPLICATION_PATH=/Users/lizhuoyuan/Development/Project/flutter_s
 export "FLUTTER_TARGET=lib/main.dart"
 export "FLUTTER_TARGET=lib/main.dart"
 export "FLUTTER_BUILD_DIR=build"
 export "FLUTTER_BUILD_DIR=build"
 export "SYMROOT=${SOURCE_ROOT}/../build/ios"
 export "SYMROOT=${SOURCE_ROOT}/../build/ios"
+export "OTHER_LDFLAGS=$(inherited) -framework Flutter"
+export "FLUTTER_FRAMEWORK_DIR=/Users/lizhuoyuan/Development/flutter/bin/cache/artifacts/engine/ios-release"
 export "FLUTTER_BUILD_NAME=1.0.0"
 export "FLUTTER_BUILD_NAME=1.0.0"
 export "FLUTTER_BUILD_NUMBER=1"
 export "FLUTTER_BUILD_NUMBER=1"
 export "DART_OBFUSCATION=false"
 export "DART_OBFUSCATION=false"
 export "TRACK_WIDGET_CREATION=false"
 export "TRACK_WIDGET_CREATION=false"
-export "TREE_SHAKE_ICONS=false"
+export "TREE_SHAKE_ICONS=true"
 export "PACKAGE_CONFIG=.packages"
 export "PACKAGE_CONFIG=.packages"

@@ -144,6 +144,8 @@
 				TargetAttributes = {
 				TargetAttributes = {
 					97C146ED1CF9000F007C117D = {
 					97C146ED1CF9000F007C117D = {
 						CreatedOnToolsVersion = 7.3.1;
 						CreatedOnToolsVersion = 7.3.1;
+						DevelopmentTeam = HW92UC978N;
+						ProvisioningStyle = Automatic;
 					};
 					};
 				};
 				};
 			};
 			};
@@ -350,8 +352,10 @@
 			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
 			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
 			buildSettings = {
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CODE_SIGN_IDENTITY = "Apple Development";
+				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = "";
+				DEVELOPMENT_TEAM = HW92UC978N;
 				ENABLE_BITCODE = NO;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
 					"$(inherited)",
@@ -365,6 +369,7 @@
 				);
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = li.zhuoyuan.example;
 				PRODUCT_BUNDLE_IDENTIFIER = li.zhuoyuan.example;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSIONING_SYSTEM = "apple-generic";
 			};
 			};
 			name = Debug;
 			name = Debug;
@@ -375,7 +380,7 @@
 			buildSettings = {
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = E4T4EJGC8Z;
+				DEVELOPMENT_TEAM = HW92UC978N;
 				ENABLE_BITCODE = NO;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
 					"$(inherited)",

@@ -14,6 +14,9 @@ class MyApp extends StatelessWidget {
         title: 'Flutter_ScreenUtil',
         title: 'Flutter_ScreenUtil',
         theme: ThemeData(
         theme: ThemeData(
           primarySwatch: Colors.blue,
           primarySwatch: Colors.blue,
+          textTheme: TextTheme(
+            button: TextStyle(fontSize: 45.sp)
+          ),
         ),
         ),
         builder: (context, widget) {
         builder: (context, widget) {
           return MediaQuery(
           return MediaQuery(