答案 0 :(得分:0)
我认为使用水平UICollectionView是经济实惠的想法。 您可以制作添加图片按钮'如果您将其添加为页脚,则始终位于最后。
为此,请将UICollectionViewFlowLayout子类化并覆盖layoutAttributesForElementsInRect()。
override func layoutAttributesForElementsInRect(rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
if let layoutAttributesForElementsInRect = super.layoutAttributesForElementsInRect(rect), let collectionView = self.collectionView {
for layoutAttributes in layoutAttributesForElementsInRect {
if layoutAttributes.representedElementKind == UICollectionElementKindSectionFooter {
let section = layoutAttributes.indexPath.section
let numberOfItemsInSection = collectionView.numberOfItemsInSection(section)
if numberOfItemsInSection > 0 {
let lastCellIndexPath = NSIndexPath(forItem: max(0, numberOfItemsInSection - 1), inSection: section)
if let lastCellAttrs = self.layoutAttributesForItemAtIndexPath(lastCellIndexPath) {
var origin = layoutAttributes.frame.origin
origin.x = CGRectGetMaxX(lastCellAttrs.frame)
layoutAttributes.zIndex = 1024
layoutAttributes.frame.origin = origin
layoutAttributes.frame.size = layoutAttributes.frame.size
}
}
}
}
return layoutAttributesForElementsInRect
}
return nil
}