ios - Swift 4 - Collection View 将节插入应用于标题？

Question

我正在使用 Collection View ，并且可以将部分插入添加到 Collection View 内的单元格，但它似乎不适用于 Collection View 可重用 View ，是否可以为可重用 View 设置部分插入？

func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {


        if(kind == UICollectionView.elementKindSectionFooter)
        {
            let footerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "ReviewsFooter", for: indexPath) as! ReviewFooterCell

            footerView.reviewFooterDelegate = self

            return footerView
        }
        else if(kind == UICollectionView.elementKindSectionHeader)
        {
            let headerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "ReviewHeader", for: indexPath) as! ReviewHeaderCell

            headerView.totalReviews.text = "Total Reviews: " + String(self.reviews.count)

            return headerView
        }

        fatalError()

    }

Answer 1

首先，让我们明确一下节插入到底是什么。

Section insets are margins applied only to the items in the section. They represent the distance between the header view and the first line of items and between the last line of items and the footer view. They also indicate the spacing on either side of a single line of items. They do not affect the size of the headers or footers themselves.

以下是如何在 collectionView 中添加 section 的 insets，

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
    return UIEdgeInsets(top: 20, left: 20, bottom: 20, right: 20)
}