MonoTouch.Dialog 搜索栏在返回视图时会丢失搜索查询
本文关键字:搜索 查询 视图 Dialog 搜索栏 返回 MonoTouch | 更新日期: 2023-09-27 18:32:19
我正在使用MT。D 列出 DialogViewController 中的员工。启用搜索已打开,您可以筛选列表中的项目。但是,如果您推送到另一个视图,然后返回,则搜索栏为空。我能够让它恢复通过覆盖OnSearchTextChanged (string text)
并将字符串存储到本地字段使用的搜索查询,当视图重新成为焦点时,我使用以下代码:
public override ViewDidAppear (bool animated)
{
base.ViewDidAppear (animated);
if (EnableSearch && !string.IsNullOrWhiteSpace (lastSearchQuery))
{
this.SearchButtonClicked (lastSearchQuery); // this inserts text
this.StartSearch (); // no clue what this is doing
this.ReloadData (); // does nothing but was worth a try
}
}
该代码将文本插入搜索栏并显示它,但除非您键入某些内容,否则我无法对其进行过滤。键盘进入视图,并且有一个搜索按钮,但它不执行任何操作。有什么建议吗?
我认为您缺少的只是对DialogViewController上的PerformFilter的调用。
我键入了一个快速示例来显示行为。 我从来没有看到你观察到的确切行为。 我不必重新填充搜索字段。 作为参考,我使用的是单点触控 5.2.11。
using System;
using System.Linq;
using MonoTouch.UIKit;
using MonoTouch.Dialog;
using MonoTouch.Foundation;
namespace delete201204242A
{
[Register ("AppDelegate")]
public partial class AppDelegate : UIApplicationDelegate
{
UIWindow _window;
UINavigationController _nav;
MyDialogViewController _rootVC;
public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
_window = new UIWindow (UIScreen.MainScreen.Bounds);
RootElement _rootElement = new RootElement ("LINQ root element") {
new Section ("List") {
from x in new Expense [] { new Expense () {Name="one"}, new Expense () {Name="two"}, new Expense () {Name="three"} }
select (Element)new BindingContext (null, x, x.Name).Root
}
};
_rootVC = new MyDialogViewController (_rootElement);
_rootVC.EnableSearch = true;
_nav = new UINavigationController (_rootVC);
_window.RootViewController = _nav;
_window.MakeKeyAndVisible ();
return true;
}
public class MyDialogViewController : DialogViewController
{
public MyDialogViewController (RootElement root) : base (root) {}
public string SearchString { get; set; }
public override void ViewDidAppear (bool animated)
{
base.ViewDidAppear (animated);
if (!string.IsNullOrEmpty (SearchString))
this.PerformFilter (SearchString);
}
public override void OnSearchTextChanged (string text)
{
base.OnSearchTextChanged (text);
SearchString = text;
}
}
public class Expense
{
[Section("Expense Entry")]
[Entry("Enter expense name")]
public string Name;
[Section("Expense Details")]
[Caption("Description")]
[Entry]
public string Details;
}
}
}