单击“取消"按钮如何退出搜索? [英] How to exit from the search on clicking on Cancel button?

问题描述

我有一个带有取消按钮的搜索栏.但是，当我单击取消"按钮时，它不会关闭搜索栏.如何在单击取消"时使搜索栏返回到第一个状态?

I have a search bar with cancel button. But when I click on Cancel button it doesn't close the search bar. How can I make that on click on Cancel it will return search bar to the first state?

如果您有任何问题-请问我

If you have any questions - ask me, please

推荐答案

您需要实现UISearchBarDelegate:

You need to implement the UISearchBarDelegate :

class ViewController: UIViewController, UISearchBarDelegate {
    @IBOutlet weak var searchBar: UISearchBar!

将搜索栏委托设置为self

Set the search bar delegate to self

 override func viewDidLoad() {
        super.viewDidLoad()

        searchBar.showsCancelButton = true
        searchBar.delegate = self

，然后实现butCancelSearchAction委托函数，以执行取消搜索动作并重置搜索文本所需的所有操作:

and then implement the butCancelSearchAction delegate function to do whatever you need to do to cancel the search action and reset the search text:

func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
    // Do some search stuff
}

func searchBarCancelButtonClicked(searchBar: UISearchBar) {
    // Stop doing the search stuff
    // and clear the text in the search bar
    searchBar.text = ""
    // Hide the cancel button
    searchBar.showsCancelButton = false
    // You could also change the position, frame etc of the searchBar 
}

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