我有一个TableViewController,我想以模态方式呈现,我需要它有一个NavigationBar。
要获得该导航栏,我有一个嵌入式UINavigationController,据我所知,UINavigationController是我必须以模态方式呈现的,所以这就是我所做的。
一切正常,但我无法正确解雇该控制器。这是我到目前为止所得到的:
func presentErrorMessages(errorMessages: [String]) {
let storyBoard: UIStoryboard = UIStoryboard(name: "Message", bundle: nil)
let infoMessagesNavigationViewController = storyBoard.instantiateViewController(withIdentifier: "InfoMessagesNavigation") as! ModalNavigationController
let infoMessagesTableViewController = infoMessagesNavigationViewController.viewControllers[0] as! InfoMessagesTableViewController
infoMessagesTableViewController.errorMessages = errorMessages
self.navigationController?.present(infoMessagesNavigationViewController, animated: true)
}
我使用它来呈现ModalNavigationController,并将其解雇:
class ModalNavigationController: BaseNavigationController {
var backNavItem = UINavigationItem()
var okNavItem = UINavigationItem()
override func viewDidLoad() {
super.viewDidLoad()
let backButton = UIBarButtonItem(title: "Back", style: .plain, target: self, action: #selector(dismissModal))
backNavItem.leftBarButtonItem = backButton
...
var items = [UINavigationItem]()
items.append(backNavItem)
self.navigationBar.items = items
}
@objc func dismissModal() {
self.dismiss(animated: true)
}
}
当我按下后退按钮时,没有任何变化,但导航栏变为空白(没有标题)。我觉得应用程序只是“忘记”在新的呈现之前使用的NavigationController。
我该如何解决这个问题?
答案 0 :(得分:0)
尝试这样的事情:
pip install -e /usr/local/lib/python2.7/dist-packages/pysolr.py
答案 1 :(得分:0)
我设法通过在我的TableViewController而不是我的NavigationController上放置和调用dismiss
函数来解决问题:
...
public func setBackButton(){
if self.navigationController != nil {
let item = UIBarButtonItem(title: "Back", style: .plain, target: self, action: #selector(dismissModal))
self.navigationItem.leftBarButtonItem = item
}
}
@objc func dismissModal() {
self.dismiss(animated: true)
}