带有Scale的UIScrollView setContentOffset

Question

如何滚动到x，y，刻度不是1.0？

我认为我所要做的就是按比例将它复用。如果我在zoomScale为1时滚动到100,100，当zoomScale为.50时，是否应该转换为50,50？

Answer 1

不确定setContentOffset但如果你这样做就不需要转换：

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
    return self.rootView;
}

- (void)zoomToPointInRootView:(CGPoint)center atScale:(float)scale {
    CGRect zoomRect;

    zoomRect.size.height = [scrollView frame].size.height / scale;
    zoomRect.size.width  = [scrollView frame].size.width  / scale;

    zoomRect.origin.x    = center.x - (zoomRect.size.width  / 2.0);
    zoomRect.origin.y    = center.y - (zoomRect.size.height / 2.0);

    [scrollView zoomToRect:zoomRect animated:NO];
}