IPAD之分割视图 SplitViewController

转载自:http://www.w3cschool.cc/ios/att-ios-ui-splitview-htm.html

  1 分割视图的使用
 分割视图是 iPad 的特定视图控制器用于管理两个视图控制器，在左侧是一个主控制器，其右侧是一个详细信息视图控制器。 重要的属性

 delegate
 viewControllers
 示例代码和步骤
 .创建一个新项目，选择Master Detail Application并单击下一步，输入项目名称，然后选择创建。

 .简单的分割视图控制器与母版中的表视图是默认创建的。

 .在这里我们为我们创建的下列文件。

 AppDelegate.h
 AppDelegate.m
 DetailViewController.h
 DetailViewController.m
 DetailViewController.xib
 MasterViewController.h
 MasterViewController.m
 MasterViewController.xib
 . AppDelegate.h文件如下所示

 #import <UIKit/UIKit.h>

 @interface AppDelegate : UIResponder <UIApplicationDelegate>

 @property (strong, nonatomic) UIWindow *window;

 @property (strong, nonatomic) UISplitViewController *splitViewController;

 @end
 .在AppDelegate.m中的didFinishLaunchingWithOptions方法，如下所示

  - (BOOL)application:(UIApplication *)application
    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen]
    bounds]];
     // Override point for customization after application launch.
     MasterViewController *masterViewController = [[MasterViewController
     alloc] initWithNibName:@"MasterViewController" bundle:nil];
     UINavigationController *masterNavigationController =
     [[UINavigationController alloc] initWithRootViewController:
     masterViewController];

     DetailViewController *detailViewController =
     [[DetailViewController alloc] initWithNibName:@"DetailViewController"
     bundle:nil];
     UINavigationController *detailNavigationController =
     [[UINavigationController alloc] initWithRootViewController:
     detailViewController];

     masterViewController.detailViewController = detailViewController;

     self.splitViewController = [[UISplitViewController alloc] init];
     self.splitViewController.delegate = detailViewController;
     self.splitViewController.viewControllers =
     @[masterNavigationController, detailNavigationController];
     self.window.rootViewController = self.splitViewController;
     [self.window makeKeyAndVisible];
     return YES;
 }
 . MasterViewController.h，如下所示

 #import <UIKit/UIKit.h>

 @class DetailViewController;

 @interface MasterViewController : UITableViewController

 @property (strong, nonatomic) DetailViewController *detailViewController;

 @end
 . MasterViewController.m，如下所示

 #import "MasterViewController.h"

 #import "DetailViewController.h"

 @interface MasterViewController () {
     NSMutableArray *_objects;
 }
 @end

 @implementation MasterViewController

 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)
   nibBundleOrNil
 {
     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
     if (self) {
         self.title = NSLocalizedString(@"Master", @"Master");
         self.clearsSelectionOnViewWillAppear = NO;
         self.contentSizeForViewInPopover = CGSizeMake(320.0, 600.0);
     }
     return self;
 }

 - (void)viewDidLoad
 {
     [super viewDidLoad];
     self.navigationItem.leftBarButtonItem = self.editButtonItem;

     UIBarButtonItem *addButton = [[UIBarButtonItem alloc]
     initWithBarButtonSystemItem: UIBarButtonSystemItemAdd
     target:self action:@selector(insertNewObject:)];
     self.navigationItem.rightBarButtonItem = addButton;
 }

 - (void)didReceiveMemoryWarning
 {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }

 - (void)insertNewObject:(id)sender
 {
     if (!_objects) {
         _objects = [[NSMutableArray alloc] init];
     }
     [_objects insertObject:[NSDate date] atIndex:];
     NSIndexPath *indexPath = [NSIndexPath indexPathForRow: inSection:];
     [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:
     UITableViewRowAnimationAutomatic];
 }

 #pragma mark - Table View

 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
 {
     return ;
 }

 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:
   (NSInteger)section
 {
     return _objects.count;
 }

 // Customize the appearance of table view cells.
 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:
   (NSIndexPath *)indexPath
 {
     static NSString *CellIdentifier = @"Cell";

     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:
     CellIdentifier];
     if (cell == nil) {
         cell = [[UITableViewCell alloc] initWithStyle:
         UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
     }

     NSDate *object = _objects[indexPath.row];
     cell.textLabel.text = [object description];
     return cell;
 }

 - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:
   (NSIndexPath *)indexPath
 {
     // Return NO if you do not want the specified item to be editable.
     return YES;
 }

 - (void)tableView:(UITableView *)tableView commitEditingStyle:
   (UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:
   (NSIndexPath *)indexPath
 {
     if (editingStyle == UITableViewCellEditingStyleDelete) {
         [_objects removeObjectAtIndex:indexPath.row];
         [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:
         UITableViewRowAnimationFade];
     } else if (editingStyle == UITableViewCellEditingStyleInsert) {
         // Create a new instance of the appropriate class, insert it into
         //the array, and add a new row to the table view.
     }
 }

 /*
 // Override to support rearranging the table view.
 - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:
   (NSIndexPath *) fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
 {
 }
 */

 /*
 // Override to support conditional rearranging of the table view.
 - (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:
   (NSIndexPath *)indexPath
 {
     // Return NO if you do not want the item to be re-orderable.
     return YES;
 }
 */

 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:
   (NSIndexPath *)indexPath
 {
     NSDate *object = _objects[indexPath.row];
     self.detailViewController.detailItem = object;
     NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
     [formatter setDateFormat: @"yyyy-MM-dd HH:mm:ss zzz"];
     NSString *stringFromDate = [formatter stringFromDate:object];
     self.detailViewController.detailDescriptionLabel.text = stringFromDate;
 }

 @end

 . DetailViewController.h ，如下所示

 #import <UIKit/UIKit.h>

 @interface DetailViewController : UIViewController
 <UISplitViewControllerDelegate>

 @property (strong, nonatomic) id detailItem;

 @property (weak, nonatomic) IBOutlet UILabel *detailDescriptionLabel;
 @end
 . DetailViewController.m ，如下所示

 #import "DetailViewController.h"

 @interface DetailViewController ()
 @property (strong, nonatomic) UIPopoverController *masterPopoverController;
 - (void)configureView;
 @end

 @implementation DetailViewController

 #pragma mark - Managing the detail item

 - (void)setDetailItem:(id)newDetailItem
 {
     if (_detailItem != newDetailItem) {
         _detailItem = newDetailItem;

         // Update the view.
         [self configureView];
     }

     if (self.masterPopoverController != nil) {
         [self.masterPopoverController dismissPopoverAnimated:YES];
     }
 }

 - (void)configureView
 {
     // Update the user interface for the detail item.

     if (self.detailItem) {
         self.detailDescriptionLabel.text = [self.detailItem description];
     }
 }

 - (void)viewDidLoad
 {
     [super viewDidLoad];
     [self configureView];
 }

 - (void)didReceiveMemoryWarning
 {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }

 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:
   (NSBundle *)nibBundleOrNil
 {
     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
     if (self) {
         self.title = NSLocalizedString(@"Detail", @"Detail");
     }
     return self;
 }

 #pragma mark - Split view

 - (void)splitViewController:(UISplitViewController *)splitController
   willHideViewController:(UIViewController *)viewController withBarButtonItem:
   (UIBarButtonItem *)barButtonItem forPopoverController:
   (UIPopoverController *)popoverController
 {
     barButtonItem.title = NSLocalizedString(@"Master", @"Master");
     [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;
 }

 @end
 .现在当我们运行应用程序时，在横向模式下我们会得到下面的输出

 masterDetailOutput1

 . 当我们切换到纵向模式，我们会获得下面的输出:

 masterDetailOutput2