ios - 以编程方式将 ScrollView 滚动到其底部

Question

我有一个scrollview，正在尝试以编程方式滚动到其底部。

尝试了这些:

extension UIScrollView {

// Bonus: Scroll to bottom
func scrollToBottom() {
    let bottomOffset = CGPoint(x: 0, y: contentSize.height - bounds.size.height + contentInset.bottom)
    if(bottomOffset.y > 0) {
        setContentOffset(bottomOffset, animated: true)
    }
}

}

从:

Programmatically scroll a UIScrollView to the top of a child UIView (subview) in Swift

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

从:

UIScrollView scroll to bottom programmatically

但是两个都没做...

怎么做？

Answer 1

偏移量设置无效，因为您尝试在生命周期的早期进行调用。

您可以尝试通过contentOffset或viewDidLayoutSubviews更新viewDidAppear

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