TableView 在点击搜索栏时不会第一次填充数据

Question

我正在尝试通过 UISearchController 实现搜索栏并将委托实现为

 func updateSearchResultsForSearchController(searchController: UISearchController) {

            filteredTableData.removeAll(keepCapacity: true)

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

            let array = (tabledata as NSArray).filteredArrayUsingPredicate(searchPredicate)
            filteredTableData = array as! [String]
            self.tblView.reloadData()

        }

但是，当我们点击搜索栏时，tableview 不会填充数据。否则一切正常。

我也试过检查搜索栏的文本是否>1，但它在初始时有效，但在退格时给我错误。什么是黑客？

Answer 1

你应该实现UISearchbarDelegate's这个方法

searchBar:textDidChange:

所以你的台词是

 func searchBar(searchBar: UISearchBar, textDidChange searchText: String) 
{

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

        let array = (tabledata as NSArray).filteredArrayUsingPredicate(searchPredicate)
        filteredTableData = array as! [String]
        self.tblView.reloadData()
}

在此之前您需要将searchBar.delegate设置为self

Answer 2

我的问题的解决方案是

func updateSearchResultsForSearchController(searchController: UISearchController) {

if count(searchController.searchBar.text) > 0{


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

    let array = (tabledata as NSArray).filteredArrayUsingPredicate(searchPredicate)
    filteredTableData = array as! [String]
    self.tblView.reloadData()
}else if count(searchController.searchBar.text) == 0 {

    filteredTableData =  tabledata
    self.tblView.reloadData()

}

你可以按照 Saad 的想法去做：

func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {


    if count(searchBar.text) > 0{


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

    let array = (tabledata as NSArray).filteredArrayUsingPredicate(searchPredicate)
    filteredTableData = array as! [String]
    self.tblView.reloadData()
    }else if count(searchBar.text) == 0 {

          filteredTableData =  tabledata
        self.tblView.reloadData()

    }


}

TableView 在点击搜索栏时不会第一次填充数据

TableView doesnot populate data for the first time while tapping on Search bar

ios

swift

uisearchbar