GestureRecognizer 在 WP Direct3D App 中抛出异常

Question

我现在正在开发 WP10 的图形应用程序。我需要使用 GestureRecognizer 来移动屏幕上的对象并调整其大小。看起来很酷，但在某些情况下使用两个手指手势时，GestureRecognizer 会抛出此错误。

WinRT 信息：帧中的数据包不一致。指针 ID 不唯一，或者时间戳、帧 ID、指针类型或源设备存在差异。

一个手指手势就可以了。奇怪的是，这个逻辑在 WP8.1 上运行良好。

这是我的 RecognizerHelper 的源代码：

GestureHelper::GestureHelper(){
    this->recognizer = ref new GestureRecognizer();

    this->recognizer->GestureSettings = GestureSettings::ManipulationScale | GestureSettings::ManipulationTranslateX |
    GestureSettings::ManipulationTranslateY | GestureSettings::Tap | GestureSettings::ManipulationRotate | GestureSettings::DoubleTap;

    this->recognizer->Tapped += ref new TypedEventHandler<GestureRecognizer ^, TappedEventArgs ^>(this, &GestureHelper::OnTapped);
    this->recognizer->ManipulationStarted += ref new TypedEventHandler<GestureRecognizer ^, ManipulationStartedEventArgs ^>(this, &GestureHelper::OnManipulationStarted);
    this->recognizer->ManipulationCompleted += ref new TypedEventHandler<GestureRecognizer ^, ManipulationCompletedEventArgs ^>(this, &GestureHelper::OnManipulationCompleted);
    this->recognizer->ManipulationUpdated += ref new TypedEventHandler<GestureRecognizer ^, ManipulationUpdatedEventArgs ^>(this, &GestureHelper::OnManipulationUpdated);
}

void GestureHelper::ProcessPress(PointerPoint ^ppt){
    this->recognizer->ProcessDownEvent(ppt);
    if (this->Clicked) {
        this->Clicked(ppt->Position.X, ppt->Position.Y);
    }
}

void GestureHelper::ProcessMove(PointerPoint ^ppt){
    this->recognizer->ProcessMoveEvents(ppt->GetIntermediatePoints(ppt->PointerId));
}

void GestureHelper::ProcessRelease(PointerPoint ^ppt){
    this->recognizer->ProcessUpEvent(ppt);
}



void GestureHelper::OnManipulationStarted(GestureRecognizer^ sender, ManipulationStartedEventArgs^ e){
    if (this->Pressed){
        this->Pressed(e->Position.X, e->Position.Y);
    }
}

void GestureHelper::OnManipulationCompleted(GestureRecognizer ^sender, ManipulationCompletedEventArgs ^e) {
    if (this->Released) {
        this->Released(e->Position.X, e->Position.Y);
    }
}

void GestureHelper::OnManipulationUpdated(GestureRecognizer ^sender, ManipulationUpdatedEventArgs ^e){
    if (this->MoveUpdated){
        this->MoveUpdated(e->Position.X, e->Position.Y);
    }
    if (this->ZoomUpdated){
        this->ZoomUpdated(e->Delta.Scale);
    }
    if (this->RotateUpdated) {
        this->RotateUpdated(-e->Delta.Rotation);
    }
}

void GestureHelper::OnTapped(GestureRecognizer ^sender, TappedEventArgs ^e){
    if (this->Pressed) {
        this->Pressed(e->Position.X, e->Position.Y);
    }
    if (this->Released){
        this->Released(e->Position.X, e->Position.Y);
    }
}

感谢您的帮助！

更新： try-catch 有帮助，但还是想明白，为什么会抛出这个异常

Answer 1

好的，我在微软论坛上得到了答案。这是微软的错误，将在下一次更新中修复。所以现在我用try catch来解决这个问题。

在那里回答： https://social.msdn.microsoft.com/Forums/ru-RU/2353edb7-8c1c-4a8d-9e57-ece72f863616/uwpgesturerecognizer-throws-exception-in-wp-direct3d-app?forum=wpdevelop