diff --git a/ASHMessageTableViewDemo.xcodeproj/project.pbxproj b/ASHMessageTableViewDemo.xcodeproj/project.pbxproj
index e564c76..28ef975 100644
--- a/ASHMessageTableViewDemo.xcodeproj/project.pbxproj
+++ b/ASHMessageTableViewDemo.xcodeproj/project.pbxproj
@@ -14,6 +14,7 @@
 		A97429B81A68C81C00732735 /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = A97429B71A68C81C00732735 /* Images.xcassets */; };
 		A97429BB1A68C81C00732735 /* LaunchScreen.xib in Resources */ = {isa = PBXBuildFile; fileRef = A97429B91A68C81C00732735 /* LaunchScreen.xib */; };
 		A97429C71A68C81C00732735 /* ASHMessageTableViewDemoTests.m in Sources */ = {isa = PBXBuildFile; fileRef = A97429C61A68C81C00732735 /* ASHMessageTableViewDemoTests.m */; };
+		A9B965551A6D307B0017F9F2 /* MessageTableView.m in Sources */ = {isa = PBXBuildFile; fileRef = A9B965541A6D307B0017F9F2 /* MessageTableView.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -40,6 +41,8 @@
 		A97429C01A68C81C00732735 /* ASHMessageTableViewDemoTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = ASHMessageTableViewDemoTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		A97429C51A68C81C00732735 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		A97429C61A68C81C00732735 /* ASHMessageTableViewDemoTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = ASHMessageTableViewDemoTests.m; sourceTree = "<group>"; };
+		A9B965531A6D307B0017F9F2 /* MessageTableView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MessageTableView.h; sourceTree = "<group>"; };
+		A9B965541A6D307B0017F9F2 /* MessageTableView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = MessageTableView.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -89,6 +92,8 @@
 				A97429B71A68C81C00732735 /* Images.xcassets */,
 				A97429B91A68C81C00732735 /* LaunchScreen.xib */,
 				A97429AA1A68C81C00732735 /* Supporting Files */,
+				A9B965531A6D307B0017F9F2 /* MessageTableView.h */,
+				A9B965541A6D307B0017F9F2 /* MessageTableView.m */,
 			);
 			path = ASHMessageTableViewDemo;
 			sourceTree = "<group>";
@@ -220,6 +225,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				A97429B31A68C81C00732735 /* ViewController.m in Sources */,
+				A9B965551A6D307B0017F9F2 /* MessageTableView.m in Sources */,
 				A97429B01A68C81C00732735 /* AppDelegate.m in Sources */,
 				A97429AD1A68C81C00732735 /* main.m in Sources */,
 			);
@@ -412,6 +418,7 @@
 				A97429CC1A68C81C00732735 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 		A97429CD1A68C81C00732735 /* Build configuration list for PBXNativeTarget "ASHMessageTableViewDemoTests" */ = {
 			isa = XCConfigurationList;
@@ -420,6 +427,7 @@
 				A97429CF1A68C81C00732735 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
 	};
diff --git a/ASHMessageTableViewDemo.xcodeproj/project.xcworkspace/xcuserdata/xmfish.xcuserdatad/UserInterfaceState.xcuserstate b/ASHMessageTableViewDemo.xcodeproj/project.xcworkspace/xcuserdata/xmfish.xcuserdatad/UserInterfaceState.xcuserstate
index 7351f88..9d7aada 100644
Binary files a/ASHMessageTableViewDemo.xcodeproj/project.xcworkspace/xcuserdata/xmfish.xcuserdatad/UserInterfaceState.xcuserstate and b/ASHMessageTableViewDemo.xcodeproj/project.xcworkspace/xcuserdata/xmfish.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/ASHMessageTableViewDemo/MessageTableView.h b/ASHMessageTableViewDemo/MessageTableView.h
new file mode 100644
index 0000000..24abcf4
--- /dev/null
+++ b/ASHMessageTableViewDemo/MessageTableView.h
@@ -0,0 +1,13 @@
+//
+//  MessageTableView.h
+//  ASHMessageTableViewDemo
+//
+//  Created by xmfish on 15/1/19.
+//  Copyright (c) 2015年 ash. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface MessageTableView : UITableView
+
+@end
diff --git a/ASHMessageTableViewDemo/MessageTableView.m b/ASHMessageTableViewDemo/MessageTableView.m
new file mode 100644
index 0000000..d766d17
--- /dev/null
+++ b/ASHMessageTableViewDemo/MessageTableView.m
@@ -0,0 +1,35 @@
+//
+//  MessageTableView.m
+//  ASHMessageTableViewDemo
+//
+//  Created by xmfish on 15/1/19.
+//  Copyright (c) 2015年 ash. All rights reserved.
+//
+
+#import "MessageTableView.h"
+
+@implementation MessageTableView
+
+/*
+// Only override drawRect: if you perform custom drawing.
+// An empty implementation adversely affects performance during animation.
+- (void)drawRect:(CGRect)rect {
+    // Drawing code
+}
+*/
+
+
+- (void)setContentSize:(CGSize)contentSize
+{
+    if (!CGSizeEqualToSize(self.contentSize, CGSizeZero))
+    {
+        if (contentSize.height > self.contentSize.height)
+        {
+            CGPoint offset = self.contentOffset;
+            offset.y += (contentSize.height - self.contentSize.height);
+            self.contentOffset = offset;
+        }
+    }
+    [super setContentSize:contentSize];
+}
+@end