我必须把状态栏和导航栏的和乘以-1 *，因为它离屏幕有那么高，

self.tableView.setContentOffset(CGPointMake(0 , -1 * 
  (self.navigationController!.navigationBar.height +  
  UIApplication.sharedApplication().statusBarFrame.height) ), animated:true)

我必须把状态栏和导航栏的和乘以-1 *，因为它离屏幕有那么高，

self.tableView.setContentOffset(CGPointMake(0 , -1 * 
  (self.navigationController!.navigationBar.height +  
  UIApplication.sharedApplication().statusBarFrame.height) ), animated:true)

要在完成时有一个完成，请添加此扩展

// MARK: - UIScrollView

extension UIScrollView {

    /// Animate scroll to top with completion
    ///
    /// - Parameters:
    ///   - duration:   TimeInterval
    ///   - completion: Completion block
    func animateScrollToTop(withDuration duration:  TimeInterval,
                            completion:             @escaping (()->())) {

        UIView.animate(withDuration: duration, animations: { [weak self] in
                self?.setContentOffset(CGPoint.zero, animated: false)
            }, completion: { finish in
                guard finish else {
                    return
                }
                completion()
        })
    }
}

tableView.animateScrollToTop(withDuration: 0.25) { 
    // Finish
}

Swift 4通过扩展，处理空表视图:

extension UITableView {
    func scrollToTop(animated: Bool) {
        self.setContentOffset(CGPoint.zero, animated: animated);
    }
}

迅速:

tableView.setContentOffset(CGPointZero, animated: true)

不使用

 tableView.setContentOffset(.zero, animated: true)

它有时会不正确地设置偏移量。例如，在我的例子中，单元格实际上略高于带有安全区域嵌入的视图。不好的。

而不是使用

 tableView.scrollToRow(at: IndexPath(row: 0, section: 0), at: .top, animated: true)