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
  2 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
  3 
  4 delegate
  5 viewControllers
  6 示例代码和步骤
  7 1.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。
  8 
  9 2.简单的分割视图控制器与母版中的表视图是默认创建的。
 10 
 11 3.在这里我们为我们创建的下列文件。
 12 
 13 AppDelegate.h
 14 AppDelegate.m
 15 DetailViewController.h
 16 DetailViewController.m
 17 DetailViewController.xib
 18 MasterViewController.h
 19 MasterViewController.m
 20 MasterViewController.xib
 21 4. AppDelegate.h文件如下所示
 22 
 23 #import <UIKit/UIKit.h>
 24 
 25 @interface AppDelegate : UIResponder <UIApplicationDelegate>
 26 
 27 @property (strong, nonatomic) UIWindow *window;
 28 
 29 @property (strong, nonatomic) UISplitViewController *splitViewController;
 30 
 31 @end
 32 5.在AppDelegate.m中的didFinishLaunchingWithOptions方法，如下所示
 33 
 34  - (BOOL)application:(UIApplication *)application 
 35    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 36    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen]
 37    bounds]];
 38     // Override point for customization after application launch.
 39     MasterViewController *masterViewController = [[MasterViewController
 40     alloc] initWithNibName:@"MasterViewController" bundle:nil];
 41     UINavigationController *masterNavigationController = 
 42     [[UINavigationController alloc] initWithRootViewController:
 43     masterViewController];
 44 
 45     DetailViewController *detailViewController = 
 46     [[DetailViewController alloc] initWithNibName:@"DetailViewController" 
 47     bundle:nil];
 48     UINavigationController *detailNavigationController = 
 49     [[UINavigationController alloc] initWithRootViewController:
 50     detailViewController];
 51 
 52     masterViewController.detailViewController = detailViewController;
 53 
 54     self.splitViewController = [[UISplitViewController alloc] init];
 55     self.splitViewController.delegate = detailViewController;
 56     self.splitViewController.viewControllers =
 57     @[masterNavigationController, detailNavigationController];
 58     self.window.rootViewController = self.splitViewController;
 59     [self.window makeKeyAndVisible];
 60     return YES;
 61 }
 62 6. MasterViewController.h，如下所示
 63 
 64 #import <UIKit/UIKit.h>
 65 
 66 @class DetailViewController;
 67 
 68 @interface MasterViewController : UITableViewController
 69 
 70 @property (strong, nonatomic) DetailViewController *detailViewController;
 71 
 72 @end
 73 7. MasterViewController.m，如下所示
 74 
 75 #import "MasterViewController.h"
 76 
 77 #import "DetailViewController.h"
 78 
 79 @interface MasterViewController () {
 80     NSMutableArray *_objects;
 81 }
 82 @end
 83 
 84 @implementation MasterViewController
 85 
 86 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)
 87   nibBundleOrNil
 88 {
 89     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
 90     if (self) {
 91         self.title = NSLocalizedString(@"Master", @"Master");
 92         self.clearsSelectionOnViewWillAppear = NO;
 93         self.contentSizeForViewInPopover = CGSizeMake(320.0, 600.0);
 94     }
 95     return self;
 96 }
 97                             
 98 - (void)viewDidLoad
 99 {
100     [super viewDidLoad];
101     self.navigationItem.leftBarButtonItem = self.editButtonItem;
102 
103     UIBarButtonItem *addButton = [[UIBarButtonItem alloc] 
104     initWithBarButtonSystemItem: UIBarButtonSystemItemAdd 
105     target:self action:@selector(insertNewObject:)];
106     self.navigationItem.rightBarButtonItem = addButton;
107 }
108 
109 - (void)didReceiveMemoryWarning
110 {
111     [super didReceiveMemoryWarning];
112     // Dispose of any resources that can be recreated.
113 }
114 
115 - (void)insertNewObject:(id)sender
116 {
117     if (!_objects) {
118         _objects = [[NSMutableArray alloc] init];
119     }
120     [_objects insertObject:[NSDate date] atIndex:0];
121     NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
122     [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:
123     UITableViewRowAnimationAutomatic];
124 }
125 
126 #pragma mark - Table View
127 
128 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
129 {
130     return 1;
131 }
132 
133 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:
134   (NSInteger)section
135 {
136     return _objects.count;
137 }
138 
139 // Customize the appearance of table view cells.
140 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:
141   (NSIndexPath *)indexPath
142 {
143     static NSString *CellIdentifier = @"Cell";
144     
145     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:
146     CellIdentifier];
147     if (cell == nil) {
148         cell = [[UITableViewCell alloc] initWithStyle:
149         UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
150     }
151 
152 
153     NSDate *object = _objects[indexPath.row];
154     cell.textLabel.text = [object description];
155     return cell;
156 }
157 
158 - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:
159   (NSIndexPath *)indexPath
160 {
161     // Return NO if you do not want the specified item to be editable.
162     return YES;
163 }
164 
165 - (void)tableView:(UITableView *)tableView commitEditingStyle:
166   (UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:
167   (NSIndexPath *)indexPath
168 {
169     if (editingStyle == UITableViewCellEditingStyleDelete) {
170         [_objects removeObjectAtIndex:indexPath.row];
171         [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:
172         UITableViewRowAnimationFade];
173     } else if (editingStyle == UITableViewCellEditingStyleInsert) {
174         // Create a new instance of the appropriate class, insert it into 
175         //the array, and add a new row to the table view.
176     }
177 }
178 
179 /*
180 // Override to support rearranging the table view.
181 - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:
182   (NSIndexPath *) fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
183 {
184 }
185 */
186 
187 /*
188 // Override to support conditional rearranging of the table view.
189 - (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:
190   (NSIndexPath *)indexPath
191 {
192     // Return NO if you do not want the item to be re-orderable.
193     return YES;
194 }
195 */
196 
197 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:
198   (NSIndexPath *)indexPath
199 {
200     NSDate *object = _objects[indexPath.row];
201     self.detailViewController.detailItem = object;
202     NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
203     [formatter setDateFormat: @"yyyy-MM-dd HH:mm:ss zzz"];  
204     NSString *stringFromDate = [formatter stringFromDate:object];
205     self.detailViewController.detailDescriptionLabel.text = stringFromDate;
206 }
207 
208 @end
209 
210 8. DetailViewController.h ，如下所示
211 
212 #import <UIKit/UIKit.h>
213 
214 @interface DetailViewController : UIViewController
215 <UISplitViewControllerDelegate>
216 
217 @property (strong, nonatomic) id detailItem;
218 
219 @property (weak, nonatomic) IBOutlet UILabel *detailDescriptionLabel;
220 @end
221 9. DetailViewController.m ，如下所示
222 
223 #import "DetailViewController.h"
224 
225 @interface DetailViewController ()
226 @property (strong, nonatomic) UIPopoverController *masterPopoverController;
227 - (void)configureView;
228 @end
229 
230 @implementation DetailViewController
231 
232 #pragma mark - Managing the detail item
233 
234 - (void)setDetailItem:(id)newDetailItem
235 {
236     if (_detailItem != newDetailItem) {
237         _detailItem = newDetailItem;
238         
239         // Update the view.
240         [self configureView];
241     }
242 
243     if (self.masterPopoverController != nil) {
244         [self.masterPopoverController dismissPopoverAnimated:YES];
245     }        
246 }
247 
248 - (void)configureView
249 {
250     // Update the user interface for the detail item.
251 
252     if (self.detailItem) {
253         self.detailDescriptionLabel.text = [self.detailItem description];
254     }
255 }
256 
257 - (void)viewDidLoad
258 {
259     [super viewDidLoad];
260     [self configureView];
261 }
262 
263 - (void)didReceiveMemoryWarning
264 {
265     [super didReceiveMemoryWarning];
266     // Dispose of any resources that can be recreated.
267 }
268 
269 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:
270   (NSBundle *)nibBundleOrNil
271 {
272     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
273     if (self) {
274         self.title = NSLocalizedString(@"Detail", @"Detail");
275     }
276     return self;
277 }
278                             
279 #pragma mark - Split view
280 
281 - (void)splitViewController:(UISplitViewController *)splitController 
282   willHideViewController:(UIViewController *)viewController withBarButtonItem:
283   (UIBarButtonItem *)barButtonItem forPopoverController:
284   (UIPopoverController *)popoverController
285 {
286     barButtonItem.title = NSLocalizedString(@"Master", @"Master");
287     [self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES];
288     self.masterPopoverController = popoverController;
289 }
290 
291 - (void)splitViewController:(UISplitViewController *)splitController 
292   willShowViewController:(UIViewController *)viewController 
293   invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
294 {
295     // Called when the view is shown again in the split view, 
296     //invalidating the button and popover controller.
297     [self.navigationItem setLeftBarButtonItem:nil animated:YES];
298     self.masterPopoverController = nil;
299 }
300 
301 @end
302 10.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
303 
304 masterDetailOutput1
305 
306 11. 当我们切换到纵向模式，我们会获得下面的输出:
307 
308 masterDetailOutput2