搜索栏-导航栏中的“取消”按钮

debugcn 发表于 Dev

帕特里克利斯

我在做导航栏中的搜索栏。编辑时，导航栏的右侧没有“取消”按钮。

尝试过：

func searchBarTextDidBeginEditing(searchBar: UISearchBar) {

    var barButton = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Done, target: self, action: "")
    self.navigationItem.rightBarButtonItem = barButton
}

编辑：

我将搜索栏添加到导航栏，如下所示：

lazy var searchBar:UISearchBar = UISearchBar(frame: CGRectMake(0, 0, 300, 20))

        searchBar.placeholder = "Hľadať"
        searchBar.barStyle = UIBarStyle.BlackTranslucent
        var leftNavBarButton = UIBarButtonItem(customView:searchBar)
        self.navigationItem.leftBarButtonItem = leftNavBarButton

达科

这样做：

func searchBarShouldBeginEditing(searchBar: UISearchBar) -> Bool {
    var cancelSearchBarButtonItem = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Plain, target: self, action: "cancelBarButtonItemClicked")
    self.navigationItem.setRightBarButtonItem(cancelSearchBarButtonItem, animated: true)
    return true
}

并在“取消”处理程序中：

func searchBarCancelButtonClicked(searchBar: UISearchBar) {
    // closes the keyboard
    searchBar.resignFirstResponder()

    // If you are using a search controller
    // self.searchDisplayControllerCustom.setActive(false, animated: true)

    // remove the cancel button
    self.navigationItem.setRightBarButtonItem(nil, animated: true)
}

func cancelBarButtonItemClicked() {
    self.searchBarCancelButtonClicked(self.searchBar)
}

并为导航栏标题文本设置正确的颜色：

// This sets the textcolor for all navigation bars in the app
// Do this in the app delegate on startup
UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName : UIColor.whiteColor()]

并添加委托：