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[英]How to show/hide UISearchController searchBar in UITableView?
[英]iOS 13 How to hide UISearchController searchBar in navigationBar
我有帶搜索欄的導航欄(UISearchController) 我有左欄按鈕圖標,單擊該圖標時,通過將其分配給 navigationItem 來顯示此搜索 controller,如下所示:
if navigationItem.searchController != nil {
navigationItem.searchController = nil
navigationController?.view.setNeedsLayout()
navigationController?.view.layoutIfNeeded()
} else {
navigationItem.searchController = searchController
navigationController?.view.setNeedsLayout()
navigationController?.view.layoutIfNeeded()
searchController.searchBar.becomeFirstResponder()
}
它可以工作,但是如果在取消按鈕觸摸時我嘗試隱藏搜索欄,那么我的視圖 controller 被關閉並出現黑屏(沒有視圖控制器)
extension SearchableMenuViewController : UISearchBarDelegate {
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
guard #available(iOS 11.0, *) else { return }
guard !isAlwaysVisible else { return }
if #available(iOS 13.0, *) {
DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
self.navigationItem.searchController = nil
self.navigationController?.view.setNeedsLayout()
self.navigationController?.view.layoutIfNeeded()
}
} else {
navigationItem.searchController = nil
navigationController?.view.setNeedsLayout()
navigationController?.view.layoutIfNeeded()
}
}
我試圖添加延遲,因為沒有從 navigationItem 中刪除此 searchcontroller 將其設置為帶有標題 + 搜索 Controller 的擴展導航欄,然后點擊搜索圖標正確隱藏搜索 controller。 所以問題是我認為在擴展導航欄動畫時刪除搜索 controller
超級蹩腳的 haxx 可以暫時解決您的問題:
func didDismissSearchController(_ searchController: UISearchController) {
if #available(iOS 13, *) {
navigationItem.searchController = nil
self.navigationController?.view.setNeedsLayout()
self.navigationController?.view.layoutSubviews()
let view = UIView()
self.navigationController?.navigationBar.insertSubview(view, at: 1)
view.removeFromSuperview()
}
}
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