Question

我有一个连接到导航控制器的视图控制器。我想在顶部的导航栏中添加一个右键，以推送另一个视图控制器。如果我添加右键：

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

出现按钮。但是，如果我将以下行添加到forward方法，该按钮将再次消失：

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

这样做的正确方法是什么？

Answer 1

在您的代码中声明action:[self forward]]时，行UIBarButtonItem出现问题...将其更改为@selector(forward)或尝试此操作

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

并在showNextVC:

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

Answer 2

试试此代码

UIImage *rightBtnImage = [UIImage imageNamed:@"bulb-plus.png"];
UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeCustom];

[rightButton setImage:rightBtnImage forState:UIControlStateNormal];
rightButton.frame = CGRectMake(0, 0, 26, 35);

[rightButton addTarget:self
               action:@selector(rightBarButtonAction)
     forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:rightButton];
self.navigationItem.rightBarButtonItem = rightBarButtonItem;

rightBarbutton的IBAction方法

- (void)rightBarButtonAction {
    [self performSegueWithIdentifier:@"IdeaDetailSegue" sender:self];
}

希望这有帮助。

如何向推动另一个视图控制器的UINavigationController添加右键？

2 个答案: