xna - 如何在 xna 4.0 中滚动单个图像？

Question

我想像愤怒的小鸟一样在触摸时滚动单个图像。我可以使用任何手势来滚动单个图像吗？并且不使用手势如何滚动图像？请帮我。谢谢你。

Answer 1

您可以使用 pinchgesturesrecognizer 滚动图像。这是代码。

 UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc]   
 initWithTarget:self action:@selector(scaleImage:)];
 [self.view addGestureRecognizer:pinchGesture];

 - (void)scaleImage:(UIPinchGestureRecognizer *)recognizer
 {

 if([recognizer state] == UIGestureRecognizerStateEnded) {

    previousScale = 1.0;
    return;
 }

  CGFloat newScale = 1.0 - (previousScale - [recognizer scale]);
  CGAffineTransform currentTransformation = yourimage.transform;
  CGAffineTransform newTransform = CGAffineTransformScale(currentTransformation, newScale, newScale);
  yourimage.transform = newTransform;
  previousScale = [recognizer scale];
}