ios - 如何向推送另一个 View Controller 的 UINavigationController 添加右键？

Question

我有一个连接到导航 Controller 的 View Controller 。我想在顶部的导航栏中添加一个右键，以插入另一个 View Controller 。如果我添加右键:

UIBarButtonItem *Button = [[UIBarButtonItem alloc] initWithTitle:@"Map" style:UIBarButtonItemStylePlain target:self action:[self forward]];
self.navigationItem.rightBarButtonItem = Button;

按钮出现。但是，如果我将以下行添加到 forward 方法中，按钮将再次消失:

MapViewController *viewController = [self.navigationController.storyboard instantiateViewControllerWithIdentifier:@"map"];
[self.navigationController pushViewController:viewController animated:YES];

正确的做法是什么？

Answer 1

在您的代码中声明 UIBarButtonItem 时 action:[self forward]] 行有问题...将其更改为 @selector(forward ) 或者试试这个

UIBarButtonItem *nextButton = [[UIBarButtonItem alloc] initWithTitle:@"Next" style:UIBarButtonItemStylePlain target:self action:@selector(showNextVC)];          
self.navigationItem.rightBarButtonItem = nextButton;

在 showNextVC 中:

-(void) showNextVC {
 MapViewController *viewController = [self.storyboard instantiateViewControllerWithIdentifier:@"map"];
 [self.navigationController pushViewController:viewController animated:YES];
}