Swift: searchBar - 如何更改 "Cancel" 按钮标题

Question

我有一个采用了 UISearchBarDelegate 的 UIViewController。并将其委托设置为自我：resultSearchController.searchBar.delegate = self。它工作正常我用 searchBarCancelButtonClicked 方法测试它%

func searchBarCancelButtonClicked(searchBar: UISearchBar) {
        println("Сancel button tapped")
    }

我在控制台中看到“点击取消按钮”。但我想更改 "Cancel" 按钮标题，但我不知道如何更改。我试过：

func searchBarTextDidBeginEditing(searchBar: UISearchBar) {      
        var barButton = UIBarButtonItem(title: "Button Title", style: UIBarButtonItemStyle.Done, target: self, action: "here")
        self.resultSearchController.searchBar.showsCancelButton = false
        self.resultSearchController.navigationItem.rightBarButtonItem = barButton
    }

但是没用。你能帮帮我吗？

Answer 1

首先，您需要在导航控制器中显示自定义搜索栏按钮，例如

in ViewDidLoad()

self.searchDisplayController?.displaysSearchBarInNavigationBar = true

并在委托方法中

func searchBarTextDidBeginEditing(searchBar: UISearchBar) {

    var barButton = UIBarButtonItem(title: "Button Title", style: UIBarButtonItemStyle.Done, target: self, action: "here")
    self.searchDisplayController?.navigationItem.rightBarButtonItem = barButton
}

Answer 2

func searchDisplayControllerWillBeginSearch(controller: UISearchDisplayController) {
    self.searchDisplayController?.searchBar.showsCancelButton = true
    var cancelButton: UIButton
    var topView: UIView = self.searchDisplayController?.searchBar.subviews[0] as UIView
    for subView in topView.subviews {
        if subView.isKindOfClass(NSClassFromString("UINavigationButton")) {
            cancelButton = subView as UIButton
            cancelButton.setTitle("Vazgeç", forState: UIControlState.Normal)
        }
    }
}

Answer 3

我通过在 UISearchBar 对象中找到 UIButton 指针解决了这个问题。我的项目中有 objective-c 代码，但您可以看到其中的逻辑。

- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar {

    [searchBar setShowsCancelButton:YES animated:YES];

    for (UIView *ob in ((UIView*)searchBar.subviews[0]).subviews) {
        if ([ob isKindOfClass:[UIButton class]]) {
            UIButton *btn = (UIButton*)ob;
            [btn setTitle:@"İptal" forState:UIControlStateNormal];
        }
    }
    return YES;
}

Answer 4

尝试使用 setValue 访问按钮文本，如下所示：

Swift 4

searchController.searchBar.setValue("New Title", forKey: "cancelButtonText")

对我有用:)

Answer 5

勾选这个answer。

以上答案中的示例更新为 Swift 5:

if let cancelButton = searchController.searchBar.value(forKey: "cancelButton") as? UIButton {
    cancelButton.setTitle(<your_string>, for: <UIControlState>)
    cancelButton.setTitleColor(<your_uicolor>, for: <UIControlState>)
    cancelButton.setAttributedTitle(<your_nsattributedstring>, for: <UIControlState>)
}

Answer 6

初始化搜索控制器后，将其放入视图控制器的 viewDidLoad() 中。

UIBarButtonItem.appearance(whenContainedInInstancesOf: [UISearchBar.self]).title = "your button title"

Answer 7

对于Swift 5

searchBar.delegate = 自己

func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
     let cBtn = searchBar.value(forKey: "cancelButton") as! UIButton
     cBtn.setTitle("MyCustomText", for: .normal)
}

Swift: searchBar - 如何更改 "Cancel" 按钮标题

Swift: searchBar - how to change "Cancel" Button title

uisearchbar

ios

swift