在 swift 中用搜索栏替换后如何将 self.navigationItem.titleView 放入标题

Question

我有搜索栏，当点击图片时，它会在顶部导航创建搜索栏，替换为标题。然后当在搜索栏外点击时，标题不再显示，它仍然带有搜索栏（文本字段），如果在搜索栏外点击或点击如何再次显示标题？

这是在顶部导航创建搜索栏的代码，替换为标题。

func createSearchBar(){
    searchBar.sizeToFit()
    searchBar.showsCancelButton = false
    searchBar.placeholder = "Enter key"
    searchBar.delegate = self
    self.navigationItem.titleView = searchBar
}

这是点击搜索栏外部时的代码

extension ViewCon {
func hideKeyboardWhenTappedAround() {
    let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ViewCon.dismissKeyboard))
    view.addGestureRecognizer(tap)
}

func dismissKeyboard() {
    self.searchBar.resignFirstResponder()
 self.navigationController?.navigationBar.topItem?.title="Title List"
}

}

但是我要如何再次在顶部导航中显示标题？

Answer 1

您需要将 nil

self.navigationItem.titleView = nil

参见：https://developer.apple.com/reference/uikit/uinavigationitem/1624935-titleview

在 swift 中用搜索栏替换后如何将 self.navigationItem.titleView 放入标题

How to put self.navigationItem.titleView with title after replace it with searchbar in swift

navigation

title

hide

searchbar

swift