而马特的解决方案似乎对我来说是正确的，你需要考虑到集合视图嵌入，如果有一个已经设置。

修改后的代码为:

CGSize csz = sv.contentSize;
CGSize bsz = sv.bounds.size;
NSInteger bottomInset = sv.contentInset.bottom;
if (sv.contentOffset.y + bsz.height + bottomInset > csz.height) {
    [sv setContentOffset:CGPointMake(sv.contentOffset.x, 
                                     csz.height - bsz.height + bottomInset) 
                animated:YES];
}

要滚动到底部，我们必须使用目标视图的最大高度。

import UIKit

extension UIScrollView {

    func scrollToBottomOf(targetView: UIView, animated: Bool) {
        setContentOffset(CGPoint(x:targetView.frame.minX, y:targetView.frame.maxY), animated: animated)
    }
}

//func invocation example 
optionScrollView.scrollToBottomOf(targetView: self.optionsStackView, animated: false)

你可以使用UIScrollView的setContentOffset:animated:函数滚动到内容视图的任何部分。这里有一些代码可以滚动到底部，假设你的scrollView是self.scrollView:

objective - c:

CGPoint bottomOffset = CGPointMake(0, self.scrollView.contentSize.height - self.scrollView.bounds.size.height + self.scrollView.contentInset.bottom);
[self.scrollView setContentOffset:bottomOffset animated:YES];

迅速:

let bottomOffset = CGPoint(x: 0, y: scrollView.contentSize.height - scrollView.bounds.height + scrollView.contentInset.bottom)
scrollView.setContentOffset(bottomOffset, animated: true)

正如这里所解释的 https://janeshswift.com/ios/swift/how-to-scroll-to-a-position-programmatically-in-uiscrollview/

我们可以创建一个自定义UIScrollView扩展为

extension UIScrollView {
    
    func scrollToTop(animated: Bool = false) {
        setContentOffset(CGPoint(x: contentOffset.x, y: -adjustedContentInset.top), animated: animated)
    }
    
    var bottomContentOffsetY: CGFloat {
        max(contentSize.height - bounds.height + adjustedContentInset.bottom, -adjustedContentInset.top)
    }
    
    func scrollToBottom(animated: Bool = false) {
        setContentOffset(CGPoint(x: contentOffset.x, y: bottomContentOffsetY), animated: animated)
    }
    
    func scrollToLeading(animated: Bool = false) {
        setContentOffset(CGPoint(x: -adjustedContentInset.left, y: contentOffset.y), animated: animated)
    }
    
    var trailingContentOffsetX: CGFloat {
        max(contentSize.width - bounds.width + adjustedContentInset.right, -adjustedContentInset.left)
    }
    
    func scrollToTrailing(animated: Bool = false) {
        setContentOffset(CGPoint(x: trailingContentOffsetX, y: contentOffset.y), animated: animated)
    }
    
    func scrollViewToVisible(_ view: UIView, animated: Bool = false) {
        scrollRectToVisible(convert(view.bounds, from: view), animated: true)
    }
    
    var isOnTop: Bool {
        contentOffset.y <= -adjustedContentInset.top
    }
    
    var isOnBottom: Bool {
        contentOffset.y >= bottomContentOffsetY
    }
    
}

把它当作——

DispatchQueue.main.async {
    self.itemsScrollView.scrollToBottom()
}

Xamarin的。iOS版本的UICollectionView的接受答案，便于复制和粘贴

var bottomOffset = new CGPoint (0, CollectionView.ContentSize.Height - CollectionView.Frame.Size.Height + CollectionView.ContentInset.Bottom);          
CollectionView.SetContentOffset (bottomOffset, false);

滚动到顶部

- CGPoint topOffset = CGPointMake(0, 0);
- [scrollView setContentOffset:topOffset animated:YES];

滚动到底部

- CGPoint bottomOffset = CGPointMake(0, scrollView.contentSize.height - self.scrollView.bounds.size.height);
 - [scrollView setContentOffset:bottomOffset animated:YES];