Swift CollectionView插件

Question

我知道这已经被问了很多次，但是我现在无法找到适当的解决方案，尽管我已经挖了很长时间。

我有一个带有标题的集合视图。

我想在标题和主集合视图之间留一个空格。

我尝试实现如下的插图：

@objc(collectionView:layout:insetForSectionAtIndex:)  override func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets{

    print("called insetForSectionAt with a section value of:  \(section)")

    if ( section == 1 ) {return UIEdgeInsetsMake(100, 0, 0, 0)}

    else {return UIEdgeInsetsMake(0, 0, 0, 0) }

}

得到以下内容：

called insetForSectionAt with a section value of:  0 
called insetForSectionAt with a section value of:  0
called insetForSectionAt with a section value of:  0
called insetForSectionAt with a section value of:  0
called insetForSectionAt with a section value of:  0
called insetForSectionAt with a section value of:  0

很明显这样做什么都没有，ow可以为主集合视图设置插图而不是整个屏幕本身？如果我使用100作为index0的顶部插入，这会影响标题，这不是我需要的。

感谢。