你需要创建一个自定义NavigationRenderer
并插入自己的UISearchBar
到UIToolbar
或SearchView
到ViewGroup
:
Xamarin形式:Renderer Base Classes and Native Controls
由于插入的iOS UISearchBar
到导航栏通过的例子自定义NavigationRenderer
:
注意:为了保持事物解耦,使用MessagingCenter
可让您在自定义渲染器内没有任何硬编码事件依赖关系的情况下抽取消息。
[assembly:ExportRenderer (typeof(NavigationPage), typeof(SeachBarNavigationRender))]
namespace Forms.Life.Cycle.iOS
{
public class SeachBarNavigationRender : NavigationRenderer
{
public SeachBarNavigationRender() : base()
{
}
public override void PushViewController (UIViewController viewController, bool animated)
{
base.PushViewController (viewController, animated);
List<UIBarButtonItem> toolbarItem = new List<UIBarButtonItem>();
foreach (UIBarButtonItem barButtonItem in TopViewController.NavigationItem.RightBarButtonItems) {
if (barButtonItem.Title.Contains("search")) {
UISearchBar search = new UISearchBar (new CGRect (0, 0, 200, 25));
search.BackgroundColor = UIColor.LightGray;
search.SearchBarStyle = UISearchBarStyle.Prominent;
search.TextChanged += (object sender, UISearchBarTextChangedEventArgs e) => {
D.WriteLine(e.SearchText);
MessagingCenter.Send<object, string> (this, "SearchText", e.SearchText);
};
barButtonItem.CustomView = search;
}
toolbarItem.Add (barButtonItem);
}
TopViewController.NavigationItem.RightBarButtonItems = toolbarItem.ToArray();
}
}
}
得到了一些代码让这个工作在Android自定义渲染器? :) – jdstaerk
@DDerType我需要相同的想法android.do你有... – SANDEEP