iphone：UISplitView

    UINavigationController *nc = [self.splitViewController.viewControllers  lastObject];

    self.detailViewController = (SplitViewDetailViewController *)[nc topViewController];

有一個splitViewController屬性，其viewControllers為一個含兩個ViewController的數組，0-left，1-right in landscape

 

 

看文檔：https://developer.apple.com/library/ios/#documentation/UIKit/Reference/UISplitViewController_class/Reference/Reference.html#//apple_ref/doc/uid/TP40009277

The array in this property must contain exactly two view controllers. The view controllers are presented left-to-right in the split view interface when it is in a landscape orientation. Thus, the view controller at index 0 is displayed on the left side and the view controller at index 1 is displayed on the right side of the interface.

The first view controller in this array is typically hidden when the device is in a portrait orientation. Assign a delegate object to the receiver if you want to coordinate the display of this view controller using a popover.

 

建立過程：

在StoryBoard中讓Master Detail都Embed in navi..

然後先在AppDelegate的

didFinishLaunchingWithOptions中添加代碼，使得splitView的delegate為DetailViewController

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    // Override point for customization after application launch.    UISplitViewController *splitViewController = (UISplitViewController *)self.window.rootViewController;    UINavigationController *navigationController = [splitViewController.viewControllers lastObject];    splitViewController.delegate = (id)navigationController.topViewController;    return YES;}

在MasterVC中取得DetailVC

 

@property (strong, nonatomic) DetailViewController *detailViewController;

viewDidLoad：

    UINavigationController *nc = [self.splitViewController.viewControllers  lastObject];

    self.detailViewController = (DetailViewController *)[nc topViewController];

 

self.detailViewController.detailItem =  xxxx；

 

在DetailVC中，當然要遵循<UISplitViewControllerDelegate>

 

@property (strong, nonatomic) id detailItem;//in .h

@property (strong, nonatomic) UIPopoverController *masterPopoverController;//in .m

 

- (void)setDetailItem:(id)newDetailItem {        

    // Update the view.  

}

#pragma mark - Split view- (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)popoverController{    barButtonItem.title = @"列表";    [self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES];    self.masterPopoverController = popoverController;}- (void)splitViewController:(UISplitViewController *)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem{    // Called when the view is shown again in the split view, invalidating the button and popover controller.    [self.navigationItem setLeftBarButtonItem:nil animated:YES];    self.masterPopoverController = nil;}

 

    若DetailVC不止是一個ViewController，我們可以使MasterVC遵循<UISplitViewControllerDelegate>,實現其委託方法；讓DetailVC遵循自訂的協議，其功能是使在land和port時隱藏\顯示 調出popover的barItem

 

然後在tableView:didSelectRowAtIndexPath： 中執行個體化相應的DetailVC，

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Storyboard" bundle:nil];

    FirstDetailViewController *newDetailViewController = [storyboard instantiateViewControllerWithIdentifier:@"v1"];

    detailViewController = newDetailViewController;

 當然也可以通過StoryBoard中的Segue代替實現執行個體化功能