iphone - 将后退按钮放在由另一个模态视图插入的模态视图内

Question

检查一下，我正在将一个模态视图插入另一个模态视图内。但是，我试图在此模态视图中放置一个按钮，但没有运气。

我做错了什么？

谢谢!

 CadastroViewController *addController = [[CadastroViewController alloc] initWithNibName:@"CadastroViewController" bundle:nil];

// This is where you wrap the view up nicely in a navigation controller
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:addController];

// You can even set the style of stuff before you show it
navigationController.navigationBar.barStyle = UIBarStyleBlackOpaque;

navigationController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"OK" style:UIBarButtonItemStyleBordered target:self action:@selector(buy)];


// And now you want to present the view in a modal fashion all nice and animated
[self presentModalViewController:navigationController animated:YES];

// make sure you release your stuff
[navigationController release];
[addController release];

Answer 1

您必须将新的 UINavigationItem 添加到实际 View Controller 的导航栏 - 而不是导航 Controller 。

addController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"OK" style:UIBarButtonItemStyleBordered target:self action:@selector(buy)];