在没有故事板的情况下使用 UISearchController

Question

我对 iOS 比较陌生（100 小时左右），我正在尝试实现没有故事板的 UISearchController。是否可以通过编程方式执行此操作？

Answer 1

您必须以编程方式实现 UISearchController，因为 Apple 尚未提供使用 Storyboard 进行设置的功能。

以下是在视图控制器

中实现UISearchController的步骤

符合UISearchResultsUpdating协议
创建一个变量来引用 UISearchController
```
var searchController: UISearchController!
```

在viewDidLoad(_:)

中设置searchController

override func viewDidLoad() {
    super.viewDidLoad()

    searchController = UISearchController(searchResultsController: nil)

    // The object responsible for updating the contents of the search results controller.
    searchController.searchResultsUpdater = self

    // Determines whether the underlying content is dimmed during a search.
    // if we are presenting the display results in the same view, this should be false
    searchController.dimsBackgroundDuringPresentation = false

    // Make sure the that the search bar is visible within the navigation bar.
    searchController.searchBar.sizeToFit()

    // Include the search controller's search bar within the table's header view.
    tableView.tableHeaderView = searchController.searchBar

    definesPresentationContext = true
}

实现方法updateSearchResultsForSearchController(_:)，当搜索栏成为第一响应者或用户对搜索栏内的文本进行更改时调用

func updateSearchResultsForSearchController(searchController: UISearchController) {
    // No need to update anything if we're being dismissed.
    if !searchController.active {
        return
    }

    // you can access the text in the search bar as below
    filterString = searchController.searchBar.text

    // write some code to filter the data provided to your tableview
}

在没有故事板的情况下使用 UISearchController

Use UISearchController without storyboard

uitableview

ios

uisearchcontroller