数据为空时，要显示UICollectionReusableView header。空视图会挡住header。使点击交互失效

[JadeXH]

 collectionView.register(HeaderView.self, forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: NSStringFromClass(HeaderView.self))

func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
switch kind {
case UICollectionView.elementKindSectionHeader:
let headerView = collectionView.dequeueReusableSupplementaryView(ofKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: NSStringFromClass(HeaderView.self), for: indexPath) as! HeaderView
headerView.refreshDiamond()
return headerView
default: fatalError("Unexpected element kind")
}
}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
    return .init(width: KScreenWidth, height: 105)
}