Ios 当我在搜索栏上单击“取消”时，它消失了

我正在使用UISearchBar，当我单击搜索栏上的“取消”按钮时，它将消失。UITableView移动到搜索栏顶部，搜索栏消失在下方。这是我的密码：

    searchController.searchResultsUpdater = self
    searchController.obscuresBackgroundDuringPresentation = false
    searchController.searchBar.placeholder = "Search"
    searchController.searchBar.searchBarStyle = UISearchBar.Style.prominent
    searchController.searchBar.isTranslucent = true
    searchController.hidesNavigationBarDuringPresentation = false
    
    searchController.dimsBackgroundDuringPresentation = false
    definesPresentationContext = true
    
    
    definesPresentationContext = true
    tableView.separatorStyle = .none

    let searchBar = searchController.searchBar
    searchBar.backgroundColor = UIColor.white
    searchBar.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width , height: 44)
    searchBar.searchBarStyle = UISearchBar.Style.prominent
    searchBar.placeholder = " Search book title, author..."
    searchBar.sizeToFit()
    view.backgroundColor = UIColor.white
    searchBar.isTranslucent = true
    searchBarView.addSubview(searchBar)
    innerView.addSubview(searchBarView)

---

这可能是因为单击“取消”按钮后，搜索栏会重新计算其帧，并获得零高度。尝试将搜索栏初始化逻辑移动到分离方法，并在UISearchBarDeleteGate的searchBarCancelButtonClicked方法中调用它

另外，我给你的建议是：将部署目标升级到iOS 11，而不是使用搜索栏进行操作，只需使用以下命令：

self.navigationItem.searchController = searchController