diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..31faac4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,45 @@
+# Xcode
+#
+# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
+
+## Build generated
+build/
+DerivedData
+
+## Various settings
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+
+## Other
+*.xccheckout
+*.moved-aside
+*.xcuserstate
+
+## Obj-C/Swift specific
+*.hmap
+*.ipa
+
+# CocoaPods
+#
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# http://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
+#
+#Pods/
+
+# Carthage
+#
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+# Carthage/Checkouts
+
+Carthage/Build
+
+*.xcuserstate
+
diff --git a/Example/MLTransitionNavigationController.xcworkspace/xcuserdata/molon.xcuserdatad/UserInterfaceState.xcuserstate b/Example/MLTransitionNavigationController.xcworkspace/xcuserdata/molon.xcuserdatad/UserInterfaceState.xcuserstate
index 59b85f1..fe5115b 100644
Binary files a/Example/MLTransitionNavigationController.xcworkspace/xcuserdata/molon.xcuserdatad/UserInterfaceState.xcuserstate and b/Example/MLTransitionNavigationController.xcworkspace/xcuserdata/molon.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/Example/MLTransitionNavigationController/AppDelegate.m b/Example/MLTransitionNavigationController/AppDelegate.m
index b69f0f8..e6d3773 100644
--- a/Example/MLTransitionNavigationController/AppDelegate.m
+++ b/Example/MLTransitionNavigationController/AppDelegate.m
@@ -13,12 +13,16 @@
 
 @implementation AppDelegate
 
+- (BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:(nullable NSDictionary *)launchOption{
+#warning one line to validate
+    [MLTransition validatePanBackWithMLTransitionGestureRecognizerType:MLTransitionGestureRecognizerTypePan];//or MLTransitionGestureRecognizerTypeScreenEdgePan
+    //...
+    return YES;
+}
+
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 {
     // Override point for customization after application launch.
-    //一句话启用
-    [MLTransition validatePanPackWithMLTransitionGestureRecognizerType:MLTransitionGestureRecognizerTypePan];
-    
     
     //简单搞下demo颜色
     UIColor *navBarColor = [UIColor colorWithRed:0.063 green:0.263 blue:0.455 alpha:1.000];
diff --git a/MLTransition.podspec b/MLTransition.podspec
index 41fa9ae..2e7aa13 100644
--- a/MLTransition.podspec
+++ b/MLTransition.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
 s.name         = "MLTransition"
-s.version      = "2.0.1"
+s.version      = "2.1.0"
 s.summary      = "iOS7+, pop ViewController with pan gesture from middle or edge of screen. "
 s.homepage     = "https://github.com/molon/MLTransition"
 s.license      = "MIT"
diff --git a/README.md b/README.md
index c1c86a1..c3deed4 100644
--- a/README.md
+++ b/README.md
@@ -13,3 +13,16 @@ The libirary uses a unpublish api(not private). But it's ok in my experience. My
 but if you use this library, tell me if you like. :)**
 
 ![MLTransition](https://raw.githubusercontent.com/molon/MLTransition/master/MLTransition.gif)
+
+
+# Usage  
+
+```
+- (BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:(nullable NSDictionary *)launchOption{
+[MLTransition validatePanBackWithMLTransitionGestureRecognizerType:MLTransitionGestureRecognizerTypePan];//or MLTransitionGestureRecognizerTypeScreenEdgePan
+//...
+return YES;
+}
+
+```    
+