diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..9254c0b
Binary files /dev/null and b/.DS_Store differ
diff --git a/ch11/.DS_Store b/ch11/.DS_Store
new file mode 100644
index 0000000..6a16efd
Binary files /dev/null and b/ch11/.DS_Store differ
diff --git a/ch11/InfiniteScrollingExample/.DS_Store b/ch11/InfiniteScrollingExample/.DS_Store
new file mode 100644
index 0000000..bec0a76
Binary files /dev/null and b/ch11/InfiniteScrollingExample/.DS_Store differ
diff --git a/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/cokecoffe.xcuserdatad/xcschemes/iOS6InfiniteScrolling.xcscheme b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/cokecoffe.xcuserdatad/xcschemes/iOS6InfiniteScrolling.xcscheme
new file mode 100644
index 0000000..b2143ca
--- /dev/null
+++ b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/cokecoffe.xcuserdatad/xcschemes/iOS6InfiniteScrolling.xcscheme
@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0460"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+               BuildableName = "iOS6InfiniteScrolling.app"
+               BlueprintName = "iOS6InfiniteScrolling"
+               ReferencedContainer = "container:iOS6InfiniteScrolling.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      buildConfiguration = "Debug">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+            BuildableName = "iOS6InfiniteScrolling.app"
+            BlueprintName = "iOS6InfiniteScrolling"
+            ReferencedContainer = "container:iOS6InfiniteScrolling.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </TestAction>
+   <LaunchAction
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      buildConfiguration = "Debug"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+            BuildableName = "iOS6InfiniteScrolling.app"
+            BlueprintName = "iOS6InfiniteScrolling"
+            ReferencedContainer = "container:iOS6InfiniteScrolling.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      buildConfiguration = "Release"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+            BuildableName = "iOS6InfiniteScrolling.app"
+            BlueprintName = "iOS6InfiniteScrolling"
+            ReferencedContainer = "container:iOS6InfiniteScrolling.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/cokecoffe.xcuserdatad/xcschemes/xcschememanagement.plist b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/cokecoffe.xcuserdatad/xcschemes/xcschememanagement.plist
new file mode 100644
index 0000000..bba7c33
--- /dev/null
+++ b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/cokecoffe.xcuserdatad/xcschemes/xcschememanagement.plist
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>iOS6InfiniteScrolling.xcscheme</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+	<key>SuppressBuildableAutocreation</key>
+	<dict>
+		<key>ABC1C8B115AAD33E0033ECF0</key>
+		<dict>
+			<key>primary</key>
+			<true/>
+		</dict>
+	</dict>
+</dict>
+</plist>
diff --git a/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcdebugger/Breakpoints.xcbkptlist b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcdebugger/Breakpoints.xcbkptlist
new file mode 100644
index 0000000..05301bc
--- /dev/null
+++ b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcdebugger/Breakpoints.xcbkptlist
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Bucket
+   type = "1"
+   version = "1.0">
+</Bucket>
diff --git a/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/iOS6InfiniteScrolling.xcscheme b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/iOS6InfiniteScrolling.xcscheme
new file mode 100644
index 0000000..b2143ca
--- /dev/null
+++ b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/iOS6InfiniteScrolling.xcscheme
@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0460"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+               BuildableName = "iOS6InfiniteScrolling.app"
+               BlueprintName = "iOS6InfiniteScrolling"
+               ReferencedContainer = "container:iOS6InfiniteScrolling.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      buildConfiguration = "Debug">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+            BuildableName = "iOS6InfiniteScrolling.app"
+            BlueprintName = "iOS6InfiniteScrolling"
+            ReferencedContainer = "container:iOS6InfiniteScrolling.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </TestAction>
+   <LaunchAction
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      buildConfiguration = "Debug"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+            BuildableName = "iOS6InfiniteScrolling.app"
+            BlueprintName = "iOS6InfiniteScrolling"
+            ReferencedContainer = "container:iOS6InfiniteScrolling.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      buildConfiguration = "Release"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+            BuildableName = "iOS6InfiniteScrolling.app"
+            BlueprintName = "iOS6InfiniteScrolling"
+            ReferencedContainer = "container:iOS6InfiniteScrolling.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/xcschememanagement.plist b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/xcschememanagement.plist
new file mode 100644
index 0000000..bba7c33
--- /dev/null
+++ b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/xcschememanagement.plist
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>iOS6InfiniteScrolling.xcscheme</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+	<key>SuppressBuildableAutocreation</key>
+	<dict>
+		<key>ABC1C8B115AAD33E0033ECF0</key>
+		<dict>
+			<key>primary</key>
+			<true/>
+		</dict>
+	</dict>
+</dict>
+</plist>
diff --git a/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/MasterViewController.m b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/MasterViewController.m
index 667a21c..b3482d8 100644
--- a/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/MasterViewController.m
+++ b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/MasterViewController.m
@@ -41,7 +41,7 @@ -(void) doRefresh {
   double delayInSeconds = 2.0;
   dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
   dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
-    self.loading = NO;
+      self.loading = NO;
   });
 }
 
diff --git a/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/PullToRefreshViewController.m b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/PullToRefreshViewController.m
index 583259b..c898e67 100755
--- a/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/PullToRefreshViewController.m
+++ b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/PullToRefreshViewController.m
@@ -63,7 +63,9 @@ - (void)viewDidLoad
     
     self.refreshControl = [[UIRefreshControl alloc] init];
     [self.refreshControl addTarget:self action:@selector(refreshedByPullingTable:) forControlEvents:UIControlEventValueChanged];
-  } else {
+  }
+  else
+  {
     
     self.refreshHeaderView = [[EGORefreshTableHeaderView alloc] initWithFrame:CGRectMake(0.0f, 0.0f - self.tableView.bounds.size.height, self.tableView.bounds.size.width, self.tableView.bounds.size.height)];
     
@@ -76,7 +78,7 @@ - (void)viewDidLoad
 - (void)scrollViewDidScroll:(UIScrollView *)scrollView
 {
   if(self.searchDisplayController.searchResultsTableView == scrollView) return;
-  
+  if(NSClassFromString(@"UIRefreshControl")) return;
 	if (self.refreshHeaderView.state == EGOOPullRefreshLoading) {
 		CGFloat offset = MAX(scrollView.contentOffset.y * -1, 0);
 		offset = MIN(offset, 60);
@@ -97,7 +99,7 @@ - (void)scrollViewDidScroll:(UIScrollView *)scrollView
 - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
 {
   if(self.searchDisplayController.searchResultsTableView == scrollView) return;
-	
+  if(NSClassFromString(@"UIRefreshControl")) return;
   if (scrollView.contentOffset.y <= - 65.0f && !self.loading) {
     self.loading = YES;
     
@@ -136,6 +138,7 @@ -(void) loadMore  {
 
 -(void) setLoading:(BOOL)loading
 {
+  if(NSClassFromString(@"UIRefreshControl")) return;
   _loading = loading;
   
   [UIView beginAnimations:nil context:NULL];
@@ -175,18 +178,22 @@ -(UITableViewCell*) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NS
   
   if(indexPath.section == self.numberOfSections)  {
     
-    static NSString *CellIdentifier = @"LoadingCell";
-		
-		UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
-		if (cell == nil)
-		{
-			cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
-      UIActivityIndicatorView *newSpin = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
-      [newSpin startAnimating];
-      [newSpin setFrame:CGRectMake( 15, 12, 20, 20) ];
-      [cell addSubview:newSpin];      
-		}
-    
+      static NSString *CellIdentifier = @"LoadingCell";
+      
+      UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
+      if (cell == nil)
+      {
+          cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
+          UIActivityIndicatorView *newSpin = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
+          [newSpin startAnimating];
+          [newSpin setFrame:CGRectMake( 15, 12, 20, 20) ];
+          [newSpin setTag:101];
+          [cell addSubview:newSpin];
+      }
+      
+      [(UIActivityIndicatorView *)[cell viewWithTag:101] startAnimating];      
+      
+      
     cell.textLabel.text = NSLocalizedString(@"Loading…", @"");
     cell.textLabel.textColor = [UIColor colorWithRed:0 green:0 blue:0.5 alpha:1.0];
     cell.textLabel.textAlignment = NSTextAlignmentCenter;
diff --git a/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/en.lproj/MainStoryboard.storyboard b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/en.lproj/MainStoryboard.storyboard
index 9cf339e..c837b11 100644
--- a/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/en.lproj/MainStoryboard.storyboard
+++ b/ch11/InfiniteScrollingExample/iOS6InfiniteScrolling/en.lproj/MainStoryboard.storyboard
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="2.0" toolsVersion="2809" systemVersion="11E53" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" initialViewController="3">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="2.0" toolsVersion="3084" systemVersion="12D78" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" initialViewController="3">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="1884"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="2083"/>
     </dependencies>
     <scenes>
         <!--Navigation Controller-->
@@ -47,17 +47,9 @@
                 </tableViewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="KL4-lq-2um" userLabel="First Responder" sceneMemberID="firstResponder"/>
             </objects>
-            <point key="canvasLocation" x="668" y="129"/>
+            <point key="canvasLocation" x="395" y="64"/>
         </scene>
     </scenes>
-    <classes>
-        <class className="MasterViewController" superclassName="PullToRefreshViewController">
-            <source key="sourceIdentifier" type="project" relativePath="./Classes/MasterViewController.h"/>
-        </class>
-        <class className="PullToRefreshViewController" superclassName="UITableViewController">
-            <source key="sourceIdentifier" type="project" relativePath="./Classes/PullToRefreshViewController.h"/>
-        </class>
-    </classes>
     <simulatedMetricsContainer key="defaultSimulatedMetrics">
         <simulatedStatusBarMetrics key="statusBar"/>
         <simulatedOrientationMetrics key="orientation"/>
diff --git a/ch11/PullToRefreshExample/.DS_Store b/ch11/PullToRefreshExample/.DS_Store
new file mode 100644
index 0000000..04f076b
Binary files /dev/null and b/ch11/PullToRefreshExample/.DS_Store differ
diff --git a/ch11/PullToRefreshExample/iOS6PullToRefresh.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcdebugger/Breakpoints.xcbkptlist b/ch11/PullToRefreshExample/iOS6PullToRefresh.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcdebugger/Breakpoints.xcbkptlist
new file mode 100644
index 0000000..05301bc
--- /dev/null
+++ b/ch11/PullToRefreshExample/iOS6PullToRefresh.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcdebugger/Breakpoints.xcbkptlist
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Bucket
+   type = "1"
+   version = "1.0">
+</Bucket>
diff --git a/ch11/PullToRefreshExample/iOS6PullToRefresh.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/iOS6PullToRefresh.xcscheme b/ch11/PullToRefreshExample/iOS6PullToRefresh.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/iOS6PullToRefresh.xcscheme
new file mode 100644
index 0000000..5358e85
--- /dev/null
+++ b/ch11/PullToRefreshExample/iOS6PullToRefresh.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/iOS6PullToRefresh.xcscheme
@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0460"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+               BuildableName = "iOS6PullToRefresh.app"
+               BlueprintName = "iOS6PullToRefresh"
+               ReferencedContainer = "container:iOS6PullToRefresh.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      buildConfiguration = "Debug">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+            BuildableName = "iOS6PullToRefresh.app"
+            BlueprintName = "iOS6PullToRefresh"
+            ReferencedContainer = "container:iOS6PullToRefresh.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </TestAction>
+   <LaunchAction
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      buildConfiguration = "Debug"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+            BuildableName = "iOS6PullToRefresh.app"
+            BlueprintName = "iOS6PullToRefresh"
+            ReferencedContainer = "container:iOS6PullToRefresh.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      buildConfiguration = "Release"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "ABC1C8B115AAD33E0033ECF0"
+            BuildableName = "iOS6PullToRefresh.app"
+            BlueprintName = "iOS6PullToRefresh"
+            ReferencedContainer = "container:iOS6PullToRefresh.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/ch11/PullToRefreshExample/iOS6PullToRefresh.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/xcschememanagement.plist b/ch11/PullToRefreshExample/iOS6PullToRefresh.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/xcschememanagement.plist
new file mode 100644
index 0000000..3ef8110
--- /dev/null
+++ b/ch11/PullToRefreshExample/iOS6PullToRefresh.xcodeproj/xcuserdata/wangkeke.xcuserdatad/xcschemes/xcschememanagement.plist
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>iOS6PullToRefresh.xcscheme</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+	<key>SuppressBuildableAutocreation</key>
+	<dict>
+		<key>ABC1C8B115AAD33E0033ECF0</key>
+		<dict>
+			<key>primary</key>
+			<true/>
+		</dict>
+	</dict>
+</dict>
+</plist>