search - updateSearchResults() 没有被调用

Question

我已经阅读了关于 SO 的类似问题和解决方案。但似乎没有一个能解决我的问题。我正在使用自定义搜索 Controller 和自定义搜索栏和 func updateSearchResults(for searchController: UISearchController) 没有被调用。

    var customSearchController: CustomSearchViewController!

CustomSearchViewController:在 ViewDidLoad()

customSearchController = CustomSearchViewController(searchResultsController: ***nil***, searchBarFrame: CGRect(x: 0.0, y: 0.0, width: searchTableView.frame.size.width, height: 44.0), searchBarFont: UIFont(name: "HelveticaNeue", size: 16.0)!, searchBarTextColor: UIColor.purple, searchBarTintColor: UIColor.white)

customSearchController.searchResultsUpdater  = self
customSearchController.definesPresentationContext = true
customSearchController.customSearchBar.placeholder = "What are you looking for?"
customSearchController.customSearchBar.backgroundColor = UIColor.white
customSearchController.customSearchBar.sizeToFit()
customSearchController.customSearchBar.resignFirstResponder()
customSearchController.customSearchBar.showsCancelButton = true
customSearchController.customSearchBar.delegate = self

没有被叫::(

func updateSearchResults(for searchController: UISearchController) {
    filtered.removeAll()
    filtered = searchArray.filter({ (text) -> Bool in
        let tmp: NSString = text as NSString
        let range = tmp.range(of: customSearchController.customSearchBar.text!, options: NSString.CompareOptions.caseInsensitive)
        return range.location != NSNotFound
    })
    self.searchTableView.reloadData()
}

Answer 1

我必须声明 UISearchController类范围内的实例。看到这个答案。 https://stackoverflow.com/a/46781890/1511978

以前我在 viewDidLoad 中声明了它。方法