Question

如何在viewcontroller上添加一个UINavigationController

Answer 1

通过appDelegate，也不用IB的方式，用代码来实现，为一个ViewController添加一个NavigationController，并且声明一下他的rootViewcontroller

<pre class="brush:objc; toolbar: true; auto-links: false;">

GroupsController *groupsController = [[[GroupsController alloc] initWithNibName:nil bundle:nil] autorelease];
UINavigationController *navigationController =
[[UINavigationController alloc] initWithRootViewController:groupsController];

[myViewController presentModalViewController: navigationController];
</pre>