Question

我选择项目模板为“单一视图”。我正在尝试按下按钮上的详细视图（UIViewController）。按钮操作正常触发并执行代码[self navigatingController] push ......我的代码是As：

MapDetailViewController *mapDetailViewController = [[MapDetailViewController alloc] init];
    [self.navigationController pushViewController:mapDetailViewController animated:YES];
    NSLog(@"self.navigation is as %@",self.navigationController);

self.navigationController是null。所以我试图为init分配一个类型为Navigation Controller的局部变量，并且该变量也能够为非null（某些十六进制值），但仍然无法推送mapDetailView。 /> 我在想的是我选择了错误的模板（基于视图）。我应该选择基于导航的（主 - 细节）。以下自动生成的代码是应用程序委托：

self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;

这里是否应对导航控制器进行一些更改？
有什么建议吗？

Answer 1

您的问题是您甚至没有导航控制器来进行推送。将您的代码更改为：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:self.viewController];
    self.window.rootViewController = nav;
    [self.window makeKeyAndVisible];
    return YES; 
}

推送视图不从基于单一视图的应用程序推送UIViewController

1 个答案: