按下表视图单元格上的新视图控制器

Question

我有一个头文件，它是

@interface DemoFirstViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>
@end

在这个头文件的源文件中，我已经声明了这个方法

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    AnotherViewController *anotherViewController=[[AnotherViewController alloc]   initWithNibName:@"AnotherViewController" bundle:nil];
    [self.navigationController pushViewController:anotherViewController animated:YES];
    NSLog(@"didSelectRowAtIndexPath: row=%d", indexPath.row);
}

另一个ViewController文件是

@interface AnotherViewController : UIViewController
{
    IBOutlet UILabel *message;
}
@property (nonatomic , retain) UILabel *message;
@end

我正在使用Xib文件来完成这一切。而不是故事板。

这是tabbased Application。和两个视图控制器已经在Appdelegate 中声明

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    UIViewController *viewController1 = [[DemoFirstViewController alloc] initWithNibName:@"DemoFirstViewController" bundle:nil];
    UIViewController *viewController2 = [[DemoSecondViewController alloc] initWithNibName:@"DemoSecondViewController" bundle:nil];
    self.tabBarController = [[UITabBarController alloc] init];
    self.tabBarController.viewControllers = @[viewController1, viewController2];
    self.window.rootViewController = self.tabBarController;
    [self.window makeKeyAndVisible];
    return YES;
}

bt在点击表格单元格时，另一个View控制器未合并。请尽快回复。

Answer 1

这背后可能有几个原因：

1. UINavigationController应该在Appdelegate类中正确实现
2. UITableView不应添加到self.view的任何subView上

3. 如果正在调用didSelectRowAtIndexPath:，则其他方面也可以。您忘记设置tableView代理
   

   tableView.delegate = self;
   

编辑：我读了Zeel的评论，他说他正在使用TabBar，他以前没有提到过，所以我正在编辑我的答案：-

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    DemoFirstViewController *viewController1 = [[DemoFirstViewController alloc] initWithNibName:@"DemoFirstViewController" bundle:nil];
    UINavigationController *nav1 =[[UINavigationController alloc] initWithRootViewController:viewController1];
    DemoSecondViewController *viewController2 = [[DemoSecondViewController alloc] initWithNibName:@"DemoSecondViewController" bundle:nil];
    UINavigationController *nav2 =[[UINavigationController alloc] initWithRootViewController:viewController2];
    self.tabBarController = [[UITabBarController alloc] init];
    self.tabBarController.viewControllers = @[nav1, nav2];
    self.window.rootViewController = self.tabBarController;
    [self.window makeKeyAndVisible];
    return YES;
}

Answer 2

以上所有答案都指向正确的方向。万一你还没有掌握它，请检查你是否在appdelegate、中添加了以下代码

UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController];  
self.window.rootViewController = navigationController;

然后再次检查。

Answer 3

NSLog(@"Navigation Controller: %@", self.navigationController);

检查这行打印的内容。我怀疑您忘记在层次结构中添加导航控制器

更新：基于你的AppDelegate代码，像这样更新它来解决你的问题：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    UIViewController *viewController1 = [[DemoFirstViewController alloc] initWithNibName:@"DemoFirstViewController" bundle:nil];
    // here I create a Navigation Controller and set its root view controller to viewController1
    UINavigationController *navController1 = [[UINavigationController alloc] initWithRootViewController:viewController1];
    UIViewController *viewController2 = [[DemoSecondViewController alloc] initWithNibName:@"DemoSecondViewController" bundle:nil];
    self.tabBarController = [[UITabBarController alloc] init];
    // updated this line to show the navController1 (which contains viewController1)
    self.tabBarController.viewControllers = @[navController1, viewController2];
    self.window.rootViewController = self.tabBarController;
    [self.window makeKeyAndVisible];
    return YES;
}

如果viewController2是一个UITableViewController，需要推送一些东西，请对它执行相同的操作(添加另一个UINavigationController，设置根viewcontroller，并设置TabBarController的viewcontroller(