未调用 searchBarCancelButtonClicked 委托方法。有什么办法可以打电话吗?

发布于 2024-10-06 03:47:45 字数 106 浏览 3 评论 0原文

UIViewController 实现一个放置 UITableView UISearchBar 的视图并被实现。但你不能调用searchBarCancelButtonClicked。不知道什么原因。

UIViewController to implement a view to placing an UITableView UISearchBar and being implemented. But you can not call searchBarCancelButtonClicked. Do not know what the reason.

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另类 2024-10-13 03:47:49

searchBarCancelButtonClicked 不触发的原因可能是因为您的 UISearchBar 没有显示“取消”按钮。您可以像这样显示“取消”按钮:

searchBar.showsCancelButton = true

我遇到了同样的问题,并且显示“取消”按钮使 searchBarCancelButtonClicked 按预期触发。

The reason why searchBarCancelButtonClicked does not fire may be because your UISearchBar does not show the Cancel button. You can display the Cancel button like this:

searchBar.showsCancelButton = true

I had the same problem and making the Cancel button show made searchBarCancelButtonClicked fire as expected.

小嗷兮 2024-10-13 03:47:49

确保您的 UIViewController 被设置为 UISearchBar 的委托,并且它采用 UISearchBarDelegate 协议。

Ensure that your UIViewController is set as the delegate of your UISearchBar, and that it adopts the UISearchBarDelegate protocol.

甜心 2024-10-13 03:47:49
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
   // This method has been called when u enter some text on search or Cancel the search.
   // so make some condition for example:

   if([searchText isEqualToString:@""] || searchText==nil) {
        // Nothing to search, empty result.
        searching = NO;
        [mytableView reloadData];
    }
}

希望有帮助。

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
   // This method has been called when u enter some text on search or Cancel the search.
   // so make some condition for example:

   if([searchText isEqualToString:@""] || searchText==nil) {
        // Nothing to search, empty result.
        searching = NO;
        [mytableView reloadData];
    }
}

Hope it helps.

紫罗兰の梦幻 2024-10-13 03:47:49

就我而言,是不受控制的 userInteractionEnabled=NO

In my case was an uncontrolled userInteractionEnabled=NO

伴随着你 2024-10-13 03:47:49

searchController.searchBar.delegate = self,不仅仅是searchController.delegate = self

searchController.searchBar.delegate = self, not just searchController.delegate = self

网名女生简单气质 2024-10-13 03:47:49

对我来说真正的原因是我认为小 x 按钮是取消按钮,但事实并非如此...如果您遇到我遇到的相同问题,请使用下面的代码

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        if searchText.isEmpty {
            searchRecords.removeAll()
            searchTableView.reloadData()
        }
    }

The real reason for me was that i thought the small x button was the meant cancel button, but it's not... if you are having the same issue i faced use the below code

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        if searchText.isEmpty {
            searchRecords.removeAll()
            searchTableView.reloadData()
        }
    }
清风疏影 2024-10-13 03:47:49

此行删除 UISearchController 透明视图

let searchController = UISearchController(searchResultsController: nil)
searchController.dimsBackgroundDuringPresentation = false

This line remove UISearchController transparent view

let searchController = UISearchController(searchResultsController: nil)
searchController.dimsBackgroundDuringPresentation = false
虫児飞 2024-10-13 03:47:49

尝试将其放入 viewDidLoad 中。就我而言,有时取消按钮操作委托“searchBarCancelButtonClicked”已触发,有时则没有(只是键盘被关闭并且取消按钮变得不活动),添加此后一切都开始按预期工作。

UIBarButtonItem.appearance(whenContainedInInstancesOf: [UISearchBar.self]).isEnabled = true

Try to put this in viewDidLoad. In my case sometimes Cancel button action delegate "searchBarCancelButtonClicked" has triggered and sometimes hasn't ( just keyboard dismissed and cancel button become not active), after adding this everything started working as expected.

UIBarButtonItem.appearance(whenContainedInInstancesOf: [UISearchBar.self]).isEnabled = true
尛丟丟 2024-10-13 03:47:49

Swift 4.2

我遇到了同样的问题,必须将 DefinePresentationContext 属性设置为 true,然后 searchBarCancelButtonClicked 方法才能工作。

 definesPresentationContext = true

Swift 4.2

I had the same problem and had to set the definesPresentationContext property to true before the searchBarCancelButtonClicked method would work.

 definesPresentationContext = true
不…忘初心 2024-10-13 03:47:49

当我在 UIScrollView 中有一个 UISearchBar 时,我遇到了同样的问题。据我了解,您将其放在 UITableView 中,它是 UIScrollView 的子类。

对我的情况有帮助的是设置

tableView.delaysContentTouches = NO;

似乎 searchBarCancelButtonClicked 方法在设置为 YES(默认设置)时效果不佳。

I ran into the same problem when I had a UISearchBar inside of a UIScrollView. As I understand the question you had it inside a UITableView, which is a subclass of UIScrollView.

What helped in my case was setting

tableView.delaysContentTouches = NO;

Seems the searchBarCancelButtonClicked method doesn't work well with that set to YES, which is the default setting.

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