我在自身对象上展示了一个包含UIViewController的UINavigationController，代码如下drawController=[[DrawImageViewControlleralloc]initWithNibName:nilbundle:nil];[drawControllersetDrawControllerDelegateObject:self];UINavigationController*nav=[[UINavigationControlleralloc]initWithRootViewController:drawController];[selfpre

我在自身对象上展示了一个包含UIViewController的UINavigationController，代码如下drawController=[[DrawImageViewControlleralloc]initWithNibName:nilbundle:nil];[drawControllersetDrawControllerDelegateObject:self];UINavigationController*nav=[[UINavigationControlleralloc]initWithRootViewController:drawController];[selfpre