vuforia iOS 应用中的触摸事件

Question

我正在使用 vuforia 创建一个基于增强现实的 iOS 应用程序。我在我的项目中集成了 Vuforia SDK。我需要在扫描目标图像时在目标图像上显示一些对象。它工作正常。当用户触摸任何对象时，我还需要在屏幕上显示一些消息。如何识别用户触摸了哪个对象？当设备放大和缩小时，触摸事件如何工作？请帮助我。

Answer 1

尝试结合 ImageTarget 和 Domino 示例。 Dominoes 中的触摸事件句柄从 dominoes 示例中的 EAGLView.mm 开始：

// Pass touch events through to the Dominoes module
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch* touch = [touches anyObject];
    CGPoint location = [touch locationInView:self];
    dominoesTouchEvent(ACTION_DOWN, 0, location.x, location.y);
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch* touch = [touches anyObject];
    CGPoint location = [touch locationInView:self];
    dominoesTouchEvent(ACTION_CANCEL, 0, location.x, location.y);
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch* touch = [touches anyObject];
    CGPoint location = [touch locationInView:self];
    dominoesTouchEvent(ACTION_UP, 0, location.x, location.y);
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch* touch = [touches anyObject];
    CGPoint location = [touch locationInView:self];
    dominoesTouchEvent(ACTION_MOVE, 0, location.x, location.y);
}

了解他们如何处理这些触摸并尝试做同样的事情。如需更多参考，请参阅 Vuforia 开发者论坛https://developer.vuforia.com/forum/ios/getting-touch-event-3d-model