Added BUG TableView State Restore

+ Sample project to reproduce bug in state restoration code when
  a table view is embedded in a navigation controller.

BUG TableView State Restore/README

@@ -0,0 +1,29 @@
+=======================================================================
+Restore - State Preservation and Restoration of Table View
+
+Version 1.0     07 April 2013   Initial version.
+=======================================================================
+
+This is a example project to reproduce a bug in the iOS 6 state preservation
+and restoration code. The state of a table view is not restored when the table
+is embedded in a navigation controller.
+
+The project contains two storyboards to demonstrate state restoration of a table
+view both when it is the root view and when it is embedded in a navigation
+controller:
+
+If the Target settings are used to set the Main Storyboad to NavStoryboard the 
+user inteface consists of UITableView embedded in a Navigation Controller. In 
+this use case the table view state is not restored.
+
+If the Target settings are used to set the Main Storyboard to MainStoryboard the 
+user interface consists of a single UITableView which does have state restored 
+as expected.
+
+For further details see the following blog post:
+
+http://useyourloaf.com/blog/2013/04/07/bug-table-view-state-not-restored-when-embedded-in-navigation-controller.html
+
+**************************************************************************
+*** This bug has been tested and reproduced for iOS 6.0 and iOS 6.1.3. ***
+**************************************************************************

BUG TableView State Restore/UYLTableViewController.h

@@ -0,0 +1,13 @@
+//
+//  UYLTableViewController.h
+//  restore
+//
+//  Created by Keith Harrison on 17/03/2013.
+//  Copyright (c) 2013 Keith Harrison. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface UYLTableViewController : UITableViewController
+
+@end

BUG TableView State Restore/UYLTableViewController.m

@@ -0,0 +1,92 @@
+//
+//  UYLTableViewController.m
+//  restore
+//
+//  Created by Keith Harrison on 17/03/2013.
+//  Copyright (c) 2013 Keith Harrison. All rights reserved.
+//
+
+#import "UYLTableViewController.h"
+
+@interface UYLTableViewController () <UIDataSourceModelAssociation>
+
+@end
+
+@implementation UYLTableViewController
+
+#pragma mark -
+#pragma mark === UITableViewDataSource Delegate
+#pragma mark -
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    return 1000;
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    static NSString *CellIdentifier = @"BasicCell";
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
+    cell.textLabel.text = [NSString stringWithFormat:@"Cell #%d",indexPath.row];
+    return cell;
+}
+
+#pragma mark -
+#pragma mark === State Preservation ===
+#pragma mark -
+
+// The following two methods are the suggested workaround from Apple to
+// forse the table view state to be restored when embedded in a
+// navigation controller. The key is to force the table view to
+// reload data when the state has been restored.
+
+//- (void) encodeRestorableStateWithCoder:(NSCoder *)coder
+//{
+//    // Save anything relevant for our role as the TableView's DataSource
+//    [super encodeRestorableStateWithCoder:coder];
+//}
+//
+//- (void) decodeRestorableStateWithCoder:(NSCoder *)coder
+//{
+//    [super decodeRestorableStateWithCoder:coder];
+//    // Restore whatever we need as the TableView's DataSource, and then...
+//    [self.tableView reloadData];
+//}
+
+
+// The following two methods are not strictly necessary in this simple example
+// but you would normally want to implement any time the data displayed in the
+// table view can change between saving and restoring the view.
+//
+// In this case we can also use this methods to force a reload of the table
+// view data when restoring state. This is a workaround for a bug that causes
+// the table view state to not be restored when embedded in a navigation controller.
+
+- (NSString *)modelIdentifierForElementAtIndexPath:(NSIndexPath *)indexPath inView:(UIView *)view
+{
+    NSString *identifier = nil;
+    if (indexPath && view)
+    {
+        identifier = [NSString stringWithFormat:@"%d",indexPath.row];
+    }
+    return identifier;
+}
+
+- (NSIndexPath *)indexPathForElementWithModelIdentifier:(NSString *)identifier inView:(UIView *)view
+{
+    NSIndexPath *indexPath = nil;
+    if (identifier && view)
+    {
+        NSInteger row = [identifier integerValue];
+        indexPath = [NSIndexPath indexPathForRow:row inSection:0];
+    }
+
+    // Force a reload when table view is embedded in nav controller
+    // or scroll position is not restored. Uncomment following line
+    // to workaround bug.
+    // [self.tableView reloadData];
+
+    return indexPath;
+}
+
+@end