在Windows Phone 8.1中对数据透视进行操作 [英] Manipulation on Pivot in Windows Phone 8.1

问题描述

我有一个带有2个PivotItems的Pivot.我正在尝试检测用户是向左还是向右滑动.我以为可以通过检查ManipulationStarted和ManipulationCompleted点之间的差异来检测到这一点.但是无论我做什么，这些事件都不会触发.

I have a Pivot with 2 PivotItems. I'm trying to detect whether the user swiped left or right. I thought I could detect this by checking the difference between the ManipulationStarted and ManipulationCompleted point. But whatever I do, those events won't get triggered.

<Pivot x:Name="albumart_pivot" Margin="0,-30,0,0" ManipulationStarted="ManipulationStartedEvent" ManipulationCompleted="ManipulationCompletedEvent" ManipulationMode="TranslateX">
    <PivotItem Margin="0">
        <Grid>
            <Rectangle Canvas.ZIndex="1" Fill="White" Opacity="0.1" Margin="20"/>
            <Image x:Name="albumart0" Stretch="UniformToFill" Canvas.ZIndex="1" Source="{Binding albumart}" Margin="20" Height="{Binding screenwidth}" Width="{Binding screenwidth}" ManipulationStarted="albumart_pivot_ManipulationStarted" ManipulationCompleted="albumart_pivot_ManipulationCompleted"/>
        </Grid>
    </PivotItem>
    <PivotItem Margin="0">
        <Grid>
            <Rectangle Canvas.ZIndex="1" Fill="White" Opacity="0.1" Margin="20"/>
            <Image x:Name="albumart1" Stretch="UniformToFill" Canvas.ZIndex="1" Source="{Binding albumart}" Margin="20" Height="{Binding screenwidth}" Width="{Binding screenwidth}" ManipulationStarted="albumart_pivot_ManipulationStarted" ManipulationCompleted="albumart_pivot_ManipulationCompleted"/>
        </Grid>
    </PivotItem>
</Pivot>

我也尝试过检测Pointer.虽然会触发PointerEntered事件，但不会触发PointerExited/PointerReleased/PointerCanceled ...

I also tried with detecting Pointer. The PointerEntered event does get fired, but the PointerExited/PointerReleased/PointerCanceled don't...

推荐答案

像 yasen所说的-枢轴拦截了触摸事件.我认为解决方案之一可能是禁用您的Pivot并利用Grid的ManipulationCompleted事件(在女巫中，您将不得不手动更改PivotItems):

Like yasen had said - Pivot intercepts touch events. I think one of the solutions may be to disable your Pivot and make use of a Grid's ManipulationCompleted event (in witch you will have to change PivotItems manually):

在XAML中:

<Grid x:Name="LayoutRoot" Background="Transparent">
    <Pivot Name="myPivot">
        <PivotItem Header="One"/>
        <PivotItem Header="Two"/>
        <PivotItem Header="Three"/>                
    </Pivot>
</Grid>

在后面的代码中:

public MainPage()
{
    this.InitializeComponent();

    myPivot.IsHitTestVisible = false; // disable the Pivot 
    LayoutRoot.ManipulationMode = ManipulationModes.TranslateX;
    LayoutRoot.ManipulationCompleted+=LayoutRoot_ManipulationCompleted;
}

private void LayoutRoot_ManipulationCompleted(object sender, ManipulationCompletedRoutedEventArgs e)
{
    var velocity = e.Velocities;
    if (velocity.Linear.X < 0) // swipe to the left
    {
        if (myPivot.SelectedIndex < myPivot.Items.Count - 1) myPivot.SelectedIndex++;
        else myPivot.SelectedIndex = 0;
    }
    else if (myPivot.SelectedIndex > 0) myPivot.SelectedIndex--; // to the right
    else myPivot.SelectedIndex = myPivot.Items.Count - 1;
}

这篇关于在Windows Phone 8.1中对数据透视进行操作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！