如何在 UISearchController 中使用范围栏

Question

我能够为 UISearchController 创建范围栏并设置它们的标题

    resultSearchController = ({

        let controller = UISearchController(searchResultsController: nil)

        controller.searchResultsUpdater = self

        controller.dimsBackgroundDuringPresentation = false

        controller.searchBar.showsScopeBar = true

        controller.searchBar.scopeButtonTitles = ["One", "two", "three"]

        controller.searchBar.sizeToFit()

        self.tableView.tableHeaderView = controller.searchBar


        return controller

    })()

但是我实际上如何使用范围栏进行排序。我目前的排序方式如下

func updateSearchResultsForSearchController(searchController: UISearchController) {

    filteredTableData.removeAll(keepCapacity: false)

    let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchController.searchBar.text)

    let array = (tableData as NSArray).filteredArrayUsingPredicate(searchPredicate)

    filteredTableData = array as! [String]

    tableView.reloadData()

}

Answer 1

虽然迟到了，但也许能帮到别人！假设您有一个对象 Person 和一个 filteredPeople 数组，您在其中保存已过滤的 People，那么

struct Person
{
  let name:String
}

func updateSearchResultsForSearchController(searchController:UISearchController)
{
    //Start filtering only when user starts to write something
    if searchController.searchBar.text.length > 0
    {
        filteredPeople.removeAll(keepCapacity: false)
        self.filterContentForSearchText(searchController.searchBar.text)
        self.tableView.reloadData()
    }
    else
    {
        self.filteredPeople = self.people
        self.tableView.reloadData()
    }
}

func filterContentForSearchText(searchText: String)
{
   self.filteredPeople = self.people.filter({( person: Person) -> Bool in

   //In this case we are searching for all, and the search is case insensitive      
   let categoryMatch = (scope == "All")
   let stringMatch = person.name.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
   return categoryMatch && (stringMatch != nil)
  })
}

Answer 2

您需要按如下方式添加搜索栏委托。

class NumberTableViewController: UITableViewController, UISearchResultsUpdating, UISearchBarDelegate {

在视图中保存注册委托确实加载如下

resultSearchController.searchBar.delegate = self

Delegate 有方法告诉您按下了哪个范围栏按钮，如下所示

    func searchBar(searchBar: UISearchBar, selectedScopeButtonIndexDidChange selectedScope: Int) {

    filterArrayWithCharacterLength(selectedScope)

}

有关详细信息，请查看我在 How to add UISearchController to tableView

上的教程

如何在 UISearchController 中使用范围栏

How to use scope bar with UISearchController

uitableview

ios

swift

uisearchcontroller