我的网页上有一个数据绑定FlipView
,效果很好。我的页面上有2个按钮,我想用它来前后导航FlipView
。当我在模拟器中使用Mouse Mode
或在本地计算机模式下实际使用鼠标时,按钮可以正常工作。
但是,当我使用“基本触控模式”或在实际触摸屏上使用我的应用程序并点按按钮时,FlipView会导航到下一个视图,但随后闪烁/翻转。
这是我的FlipView:
<FlipView x:Name="Flipper" ItemsSource="{Binding Path=Views}">...</FlipView>
我的按钮:
<Button x:Name="ForwardButton" IsEnabled="{Binding CanGoForward}" Style="{StaticResource ForwardButtonStyle}" Tapped="ForwardButton_OnTapped" />
我的活动:
private void ForwardButton_OnTapped(object sender, TappedRoutedEventArgs e)
{
if (Flipper.SelectedIndex >= Flipper.Items.Count - 1)
{
Flipper.SelectedIndex = 0;
}
else
{
Flipper.SelectedIndex++;
}
e.Handled = true;
}
更新
将OnSelectionChanged
添加到FlipView,我看到它在Basic touch mode
中被点击了两次,但在Mouse mode
只有一次,再次Mouse mode
按预期工作。
答案 0 :(得分:1)
是的,所以我这样实现了它:
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
}
ViewModel ViewModel { get { return this.DataContext as ViewModel; } }
private void Button_Click_1(object sender, RoutedEventArgs e)
{
this.ViewModel.MovePrevious();
}
private void Button_Click_2(object sender, RoutedEventArgs e)
{
this.ViewModel.MoveNext();
}
}
public class ViewModel : INotifyPropertyChanged
{
public ViewModel() { SelectedThing = ThingList.First(); }
List<int> m_ThingList = Enumerable.Range(1, 50).ToList();
public List<int> ThingList { get { return m_ThingList; } set { SetProperty(ref m_ThingList, value); } }
int m_SelectedThing = default(int);
public int SelectedThing { get { return m_SelectedThing; } set { SetProperty(ref m_SelectedThing, value); } }
internal void MovePrevious()
{
var _CurrentIndex = ThingList.IndexOf(this.SelectedThing);
try { SelectedThing = ThingList[--_CurrentIndex]; }
catch { SelectedThing = ThingList.First(); }
}
internal void MoveNext()
{
var _CurrentIndex = ThingList.IndexOf(this.SelectedThing);
try { SelectedThing = ThingList[++_CurrentIndex]; }
catch { SelectedThing = ThingList.Last(); }
}
public event PropertyChangedEventHandler PropertyChanged;
void SetProperty<T>(ref T storage, T value, [System.Runtime.CompilerServices.CallerMemberName] String propertyName = null)
{
if (!object.Equals(storage, value))
{
storage = value;
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
和
<Page.DataContext>
<local:ViewModel />
</Page.DataContext>
<Page.BottomAppBar>
<AppBar>
<Grid>
<Button HorizontalAlignment="Left" Click="Button_Click_1">Previous</Button>
<Button HorizontalAlignment="Right" Click="Button_Click_2">Next</Button>
</Grid>
</AppBar>
</Page.BottomAppBar>
<Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
<FlipView x:Name="MyFlip"
ItemsSource="{Binding ThingList}"
SelectedItem="{Binding SelectedThing,
Mode=TwoWay}" />
</Grid>
嗯,它运作正常。你能仔细检查吗?或者提供更多信息?否则,使用我的指南更新您的实现可以为您解决此问题。我希望如此。
在所有现实中,我都会使用DelegateCommand来处理按钮。但我不想过多的锅炉板代码的例子。如果你想看看我会做什么,你可以看一下:http://blog.jerrynixon.com/2012/08/most-people-are-doing-mvvm-all-wrong.html