缩放UIScrollView时的UIButton位置

我通过在视图加载时只设置一次CGPoint“center”来解决这个问题,然后根据原始位置计算一个新的中心点。

- (void)scrollViewDidZoom:(UIScrollView *)scrollView
{
    CGPoint newCenter = center; //center is set at load time, and only once
    newCenter.y = center.y * scrollView.zoomScale; //new center is calculated on original position
    newCenter.x = center.x * scrollView.zoomScale;
    button.center = newCenter;

    NSLog(@"Button coordinates are %f, %f, zoomScale is %f", button.center.x, button.center.y, scrollView.zoomScale);
}

很抱歉把问题弄错了,彼得。

– convertPoint:toView:
– convertPoint:fromView:
– convertRect:toView:
– convertRect:fromView:

请参阅UIView文档 http://developer.apple.com/library/ios/#documentation/uikit/reference/uiview_class/uiview/uiview.html