在 UISplitView 中连接母版视图和详细信息视图

Question

我在使拆分视图应用程序正常工作时遇到问题。 点击主视图中的一行时，我无法在详细信息视图中显示任何内容。 这是我现在所拥有的。 在这一点上，我完全不知所措，因为我无法弄清楚这一点。 我只需要指出正确的方向。

应用代表.h

//
//  KFBAppDelegate.h
//  KYFB
//
//  Created by KFB on 1/15/13.
//  Copyright (c) 2013 com.kfb. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface KFBAppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) UISplitViewController *splitViewController;
@end

AppDelegate.m

//
//  KFBAppDelegate.m
//  KYFB
//
//  Created by KFB on 1/15/13.
//  Copyright (c) 2013 com.kfb. All rights reserved.
//
#import "KFBAppDelegate.h"
#import "KFBMasterViewController.h"
#import "KFBDetailViewController.h"
@implementation KFBAppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    KFBMasterViewController *masterViewController = [[KFBMasterViewController alloc] initWithNibName:@"KFBMasterViewController" bundle:nil];
    UINavigationController *masterNavigationController = [[UINavigationController alloc] initWithRootViewController:masterViewController];
    KFBDetailViewController *detailViewController = [[KFBDetailViewController alloc] initWithNibName:@"KFBDetailViewController" 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;
}
- (void)applicationWillResignActive:(UIApplication *)application
{
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
- (void)applicationWillEnterForeground:(UIApplication *)application
{
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
- (void)applicationWillTerminate:(UIApplication *)application
{
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
@end

MasterViewController.h

//
//  KFBMasterViewController.h
//  KYFB
//
//  Created by KFB on 1/15/13.
//  Copyright (c) 2013 com.kfb. All rights reserved.
//
#import <UIKit/UIKit.h>
@class KFBDetailViewController;
@interface KFBMasterViewController : UITableViewController
@property (strong, nonatomic) KFBDetailViewController *detailViewController;
@end

MasterViewController.m

//
//  KFBMasterViewController.m
//  KYFB
//
//  Created by KFB on 1/15/13.
//  Copyright (c) 2013 com.kfb. All rights reserved.
//
#import "KFBMasterViewController.h"
#import "KFBDetailViewController.h"
#import "SocialNetworks.h"
@interface KFBMasterViewController () {
    NSMutableArray *_objects;
    NSMutableArray *menu;
}
@end
@implementation KFBMasterViewController
- (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];
    // Do any additional setup after loading the view, typically from a nib.
    // self.navigationItem.leftBarButtonItem = self.editButtonItem;
    // UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(insertNewObject:)];
    // self.navigationItem.rightBarButtonItem = addButton;
    menu = [NSMutableArray arrayWithObjects:@"Home", @"Public Affairs", @"Action Alerts", @"Market Updates", @"Ag Stories", @"KFB News", @"Member Benefits", @"Monthly Video", @"Photos", @"Social Media", @"About Us", @"Contact Us", @"KYFB.com", nil];
}
- (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:0];
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
    [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
#pragma mark - Table View
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return menu.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];
    cell.textLabel.text = [menu objectAtIndex:indexPath.row];
    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;
    // KFBDetailViewController *detailViewController = (KFBDetailViewController*)self.splitViewController.delegate;
    // UIViewController <SubstitutableDetailViewController> *detailViewController = nil;
    if (indexPath.row == 9)
    {
        if (!self.detailViewController)
        {
            self.detailViewController = (KFBDetailViewController*)[[SocialNetworks alloc]initWithNibName:@"SocialNetworks" bundle:nil];
        }
        [self.navigationController pushViewController:self.detailViewController animated:YES];
    }
}
@end

社交网络.h

//
//  SocialNetworks.h
//  KFBNewsroom
//
//  Created by Adam Rayborn on 10/18/12.
//  Copyright (c) 2012 com.kfb. All rights reserved.
//
#import <UIKit/UIKit.h>
#import "KFBDetailViewController.h"
@interface SocialNetworks : UIViewController <UITableViewDelegate, UITableViewDataSource, UISplitViewControllerDelegate>
@end

社交网络

//
//  SocialNetworks.m
//  KFBNewsroom
//
//  Created by Adam Rayborn on 10/18/12.
//  Copyright (c) 2012 com.kfb. All rights reserved.
//
#import "SocialNetworks.h"
@interface SocialNetworks ()
@end
@implementation SocialNetworks
{
    NSMutableArray *mbTableData;
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}
- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    mbTableData = [NSMutableArray arrayWithObjects:@"Facebook", @"Twitter", @"YouTube", nil];
    self.title = @"Social Networks";
}
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [mbTableData count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *mbTableIdentifier = @"SimpleTableItem";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:mbTableIdentifier];
    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:mbTableIdentifier];
        cell.textLabel.font=[UIFont systemFontOfSize:16.0];
    }
    // cell.backgroundView = [[CustomCellBackground alloc] init];
    // cell.selectedBackgroundView = [[CustomCellBackground alloc] init];
    cell.textLabel.backgroundColor = [UIColor clearColor];
    cell.textLabel.highlightedTextColor = [UIColor darkGrayColor];
    cell.textLabel.text = [mbTableData objectAtIndex:indexPath.row];
    return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    /*
    if (indexPath.row == 0)
    {
        Facebook *facebook = [[Facebook alloc] initWithNibName:@"Facebook" bundle:[NSBundle  mainBundle]];
        [self.navigationController pushViewController:facebook animated:YES];
    }
    else if (indexPath.row == 1)
    {
        Twitter *twitter = [[Twitter alloc] initWithNibName:@"Twitter" bundle:[NSBundle  mainBundle]];
        [self.navigationController pushViewController:twitter animated:YES];
    }
    else if (indexPath.row == 2)
    {
        YouTube *youTube = [[YouTube alloc] initWithNibName:@"YouTube" bundle:[NSBundle  mainBundle]];
        [self.navigationController pushViewController:youTube animated:YES];
    }
    */
}

@end

Answer 1

从我在你的代码中看到的，在你的MasterViewController类中，你似乎正在将DetailViewController推到你的MasterViewController的导航控制器。

我很确定这不是你想做的。试试这个：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.row == 9)
    {
        [((UINavigationController *)[self.splitViewController.viewControllers lastObject]) pushViewController:[[SocialNetworks alloc]initWithNibName:@"SocialNetworks" bundle:nil] animated:YES];
    }
}