为了简化这一点,由于应用程序设计我不能使用嵌入式导航控制器,而必须使用视图控制器上的手动后退按钮移回上一个。据我所知,以前的视图控制器也以编程方式推送到这一个。所以我在这里找到了许多不同问题的按钮的优秀代码,我为这个应用程序编写了它。问题是,当我运行程序时,我创建的条形按钮项不会显示。代码显示没有错误,我很困惑为什么没有出现。我将包含图像和代码,以使其尽可能清晰。一如既往地感谢您提供的任何帮助!!!
使用的代码:
@IBOutlet weak var roomImage: UIImageView!
@IBOutlet weak var locationLabel: UILabel!
@IBOutlet weak var roomName: UINavigationItem!
override func viewDidLoad() {
super.viewDidLoad()
// Back Button Code
let backButton = UIBarButtonItem(title:"Back",style: UIBarButtonItemStyle.plain, target: self, action: #selector(DetailView.back(sender:)))
self.navigationItem.leftBarButtonItem = backButton
navigationItem.rightBarButtonItem = backButton
navigationItem.hidesBackButton = false
// Hide da tab bar
self.tabBarController?.tabBar.isHidden = true
// Do any additional setup after loading the view.
// Enter data from other view controllers
//roomName.title = stringPassed
roomImage.image = imagePassed
locationLabel.text = locationPassed
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
// Back Button Action
func back(sender: UIBarButtonItem) {
if let navigationController = self.navigationController {
navigationController.popViewController(animated: true)
}
}
}
带导航栏的实际故事板
运行应用时
难道我没有做出某种出口或类似的东西吗?谢谢!!
故事板布局
详细信息视图的树模型(带有导航栏问题的树模型)
编辑:仍然没有工作,但你给出的链接和想法给了我很多新的想法和选择,直到一个更具体的答案出现。谢谢!!!
答案 0 :(得分:1)
你能说明你是如何推动DetialView控制器的 我以编程方式累了 像这样
func showDetialViewController(){
let detialViewController = UIViewConroller()
navigationController?.pushViewController(detialViewController, animated: true)
}
答案 1 :(得分:1)
将您从“控件库”面板拖动的NavigationBar
移至ViewController
。当您使用navigationItem
设置self.navigationItem
时,它不会引用该navigationBar
项,因为它与之无关。
当您使用ViewController
推送navigationController?.pushViewController(myVC, animated: true)
时,它会自动在NavigationBar
屏幕上显示myVC
。