ios – 全景图像的无限或无限滚动

我想为具有全景图像的UI ImageView(它是滚动视图的子视图)实现无限滚动.当用户通过手动滚动到达最后时,应该再次开始相同的图像.

示例全景图像：

我最终创建了一个scrollview,里面有一个水平stackview. stackview将动态添加和删除视图,因为用户将滚动到结尾.
诀窍是在添加或删除视图后重置contentOffset,以便用户体验无缝的无限滚动.

func scrollViewDidScroll(_ scrollView: UIScrollView) {
    if scrollView.contentOffset.x <= 0 {
        addPanoramaViewFromStackView(atPosition: 0)
        removePanoramaViewFromStackView(atPosition: 1)
        scrollView.contentOffset.x = UIScreen.main.bounds.height * ratio
    }

    else if (scrollView.contentOffset.x >= (scrollView.contentSize.width - scrollView.frame.size.width)) {
        addPanoramaViewFromStackView(atPosition: 2)
        removePanoramaViewFromStackView(atPosition: 0)
        scrollView.contentOffset.x = scrollView.contentOffset.x - UIScreen.main.bounds.height * ratio
    }
}

ratio是全景图像的宽度和高度之比.由于图像占据设备的整个高度,因此宽度将按比例计算.