在UICollectionView中,UIButtons可以用于创建跳板。以下是如何在UICollectionView中重新创建跳板的步骤:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CustomCell
cell.button.tag = indexPath.row
cell.button.addTarget(self, action: #selector(buttonTapped(sender:)), for: .touchUpInside)
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = collectionView.bounds.width / 3
let height = width
return CGSize(width: width, height: height)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 10
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return 10
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
return UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 10
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CustomCell
cell.button.tag = indexPath.row
cell.button.addTarget(self, action: #selector(buttonTapped(sender:)), for: .touchUpInside)
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let cell = collectionView.cellForItem(at: indexPath) as! CustomCell
cell.button.isSelected = true
}
func collectionView(_ collectionView: UICollectionView, didDeselectItemAt indexPath: IndexPath) {
let cell = collectionView.cellForItem(at: indexPath) as! CustomCell
cell.button.isSelected = false
}
func scrollViewDidScroll(_ scrollView: UIScrollView) {
let visibleCells = collectionView.visibleCells
for cell in visibleCells {
let indexPath = collectionView.indexPath(for: cell)
let cellRect = collectionView.layoutAttributesForItem(at: indexPath)?.frame
let cellCenterX = cellRect?.midX ?? 0
let collectionViewCenterX = collectionView.bounds.midX
if cellCenterX< collectionViewCenterX {
cell.transform = CGAffineTransform(scaleX: 1.2, y: 1.2)
} else {
cell.transform = CGAffineTransform(scaleX: 1, y: 1)
}
}
}
func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
let animation = CABasicAnimation(keyPath: "transform.scale")
animation.duration = 0.3
animation.fromValue = 0.8
animation.toValue = 1
cell.layer.add(animation, forKey: "scale")
}
@objc func buttonTapped(sender: UIButton) {
let indexPath = IndexPath(item: sender.tag, section: 0)
collectionView.selectItem(at: indexPath, animated: true, scrollPosition: .centeredHorizontally)
}
通过以上步骤,可以在UICollectionView中创建一个跳板,并且可以通过点击UIButtons来选择跳板。
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