ios self.navigationController pushViewController 不工作
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self.navigationController pushViewController not working
提问by XMarshall
I have a View application with a Single UIViewController. I then add a UITableViewControllerthrough the IB, and I am trying to display the UITableViewControllerthrough a button press in the UIViewController(my main view). My button press (IBAction) contains the following code through which I am trying to push my UITableViewControllerview and display it:
我有一个带有 Single 的 View 应用程序UIViewController。然后我UITableViewController通过 IB添加一个，并且我试图UITableViewController在UIViewController（我的主视图）中显示通过按钮按下。我的按钮按下 (IBAction) 包含以下代码，我试图通过这些代码推送我的UITableViewController视图并显示它：
DataViewController *dataController = [[DataViewController alloc] initWithNibName: @"DataViewController" bundle:nil];
[self.navigationController pushViewController:dataController animated:YES];
[dataController release];
My DataViewControlleris not at all getting pushed into the stack and displayed,
Also I have checked that in the code above, self.navigationController=nilProbably this is the source of the problem. If so, how to rectify it?
我的DataViewController根本没有被推入堆栈并显示出来，而且我已经在上面的代码中检查过，这self.navigationController=nil可能是问题的根源。如果是，如何纠正？
Please help.
请帮忙。
回答by Sreejith
UINavigationController *navCtrlr = [[UINavigationController alloc]initWithRootViewController:yourfirstviewController];
[self.window setRootViewController:navCtrlr];
navCtrlr.delegate = self;
navCtrlr.navigationBarHidden = YES;
Create navigation controller in appdelegate.mthen you can navigate to any uiviewcontroller
在其中创建导航控制器，appdelegate.m然后您可以导航到任何uiviewcontroller
回答by Scott Forbes
You need to actually create a UINavigationController. The navigationControllerproperty tells you whether your DataViewController is currently in a UINavigationController's hierarchy; if not (as in this case), the navigationControllerproperty returns nil.
您需要实际创建一个UINavigationController. 该navigationController属性告诉您您的 DataViewController 当前是否在 aUINavigationController的层次结构中；如果不是（在这种情况下），则该navigationController属性返回nil。
