我正在使用CollectionView进行单元格重新排序，但是我在重新排序单元格时遇到了问题，而不是在单元格之间创建间隙，而在重新排序单元格后如何解决单元格之间的间隙。 我正在使用三个CollectionView和两个CollectionView单元格宽度是动态的。
extension SentenceBuilderTableViewController {
func collectionView(_ collectionView: UICollectionView, canMoveItemAt indexPath: IndexPath) -> Bool {
if collectionView == tagCollectioinView {
return true
}else {
return false
}
}
func collectionView(_ collectionView: UICollectionView, moveItemAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
if collectionView == tagCollectioinView {
let item = str_arr.remove(at: sourceIndexPath.item)
str_arr.insert(item, at: destinationIndexPath.item)
textStr = str_arr.joined(separator: " ")
tagCollectioinView.reloadData()
print(str_arr)
}
else {
}
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
if collectionView == tagCollectioinView{
return 1
}
if collectionView == suggectionCollectionView {
return 1
}
else {
return categoryArr.count
}
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if collectionView == tagCollectioinView {
return str_arr.count
}
if collectionView == suggectionCollectionView {
return suggestionArr.count
}
else {
let catIdict = categoryArr[collectionView.tag] as? NSDictionary
if catIdict != nil {
let id = catIdict?["categoryID"] as! Int
if section == id {
print(textByCategoryDict["\(id)"] ?? "")
let countArr = textByCategoryDict["\(id)"] as? NSArray
print(countArr?.count ?? 0)
return countArr?.count ?? 0
}
else {
return 0
}
}
else {
return 0
}
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if collectionView == tagCollectioinView {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "TagCollectionCell", for: indexPath as IndexPath) as! TagCollectionCell
cell.tagNameLbl.text = str_arr[indexPath.row]
cell.backgroundColor = UIColor.cyan // make cell
cell.tagRemoveBtn.tag = indexPath.row
cell.tagRemoveBtn.addTarget(self, action: #selector(deleteUser), for: UIControl.Event.touchUpInside) //Add target for delete tag
cell.layer.cornerRadius = 10
cell.clipsToBounds = true
return cell
}
else if collectionView == suggectionCollectionView {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "SuggestionCell", for: indexPath as IndexPath) as! SuggestionCell
cell.lblName.layer.cornerRadius = 10
cell.lblName.text = suggestionArr[indexPath.row] as? String
cell.clipsToBounds = true
return cell
}
else {
guard let cell: IndexedCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: IndexedCollectionViewCell.identifier, for: indexPath) as? IndexedCollectionViewCell else {
fatalError("UICollectionViewCell must be of IndexedCollectionViewCell type")
}
guard let indexedCollectionView: IndexedCollectionView = collectionView as? IndexedCollectionView else {
fatalError("UICollectionView must be of IndexedCollectionView type")
}
cell.layer.cornerRadius = 10
cell.clipsToBounds = true
let catIdict = categoryArr[indexedCollectionView.indexPath.section] as? NSDictionary
let id = catIdict?["categoryID"] as! Int
let countArr = textByCategoryDict["\(id)"] as? NSArray
cell.setLabelText(countArr![indexPath.row ] as! String)
print(countArr?.count)
cell.backgroundColor = colorsDict[indexedCollectionView.indexPath.section]?[indexPath.row]
return cell
}
}
// MARK: <UICollectionViewDelegate Flow Layout>
func collectionView(_ collectionView: UICollectionView, layout _: UICollectionViewLayout, insetForSectionAt _: Int) -> UIEdgeInsets {
if collectionView == tagCollectioinView {
return UIEdgeInsets(top:5, left: 5 , bottom:5, right: 5)
}
else if collectionView == suggectionCollectionView {
return UIEdgeInsets(top:5, left: 5 , bottom:5, right: 5)
}
else {
return UIEdgeInsets(top: 5, left: 0, bottom: 5, right: 0)
}
}
func collectionView(_ collectionView: UICollectionView, layout _: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
if collectionView == tagCollectioinView {
let label = UILabel(frame: CGRect.zero)
label.sizeToFit()
let size = ( str_arr[indexPath.row] as NSString).size(withAttributes: nil)
// return CGSize(width: 120, height: 35)
let tableViewCellHeight: CGFloat = tableViewRowHeight//tableView.rowHeight
let collectionItemWidth: CGFloat = tableViewCellHeight - (collectionLeftInset + collectionRightInset)
let collectionViewHeight: CGFloat = collectionItemWidth
print(self.tagCollectioinView.frame.width)
let tagLabelSize = collectionItemWidth + size.width + 20
if tagLabelSize > self.tagCollectioinView.frame.width {
return CGSize(width: 370 , height: collectionViewHeight - 40 )
}
else {
return CGSize(width: tagLabelSize , height: collectionViewHeight - 40 )
}
}
else if collectionView == suggectionCollectionView {
let label = UILabel(frame: CGRect.zero)
label.sizeToFit()
let size = ( suggestionArr[indexPath.row] as! NSString).size(withAttributes: nil)
let tableViewCellHeight: CGFloat = tableViewRowHeight//tableView.rowHeight
let collectionItemWidth: CGFloat = tableViewCellHeight - (collectionLeftInset + collectionRightInset)
let collectionViewHeight: CGFloat = collectionItemWidth
return CGSize(width: collectionItemWidth + 20 , height: 50 ) }
else {
let label = UILabel(frame: CGRect.zero)
guard let indexedCollectionView: IndexedCollectionView = collectionView as? IndexedCollectionView else {
fatalError("UICollectionView must be of IndexedCollectionView type")
}
let catIdict = categoryArr[indexedCollectionView.indexPath.section] as? NSDictionary
let id = catIdict?["categoryID"] as! Int
let countArr = textByCategoryDict["\(id)"] as? NSArray
label.text = countArr![indexPath.row ] as? String
label.sizeToFit()
let size = ( label.text)?.size(withAttributes: nil)
let tableViewCellHeight: CGFloat = tableViewRowHeight//tableView.rowHeight
let collectionItemWidth: CGFloat = tableViewCellHeight - (collectionLeftInset + collectionRightInset)
let collectionViewHeight: CGFloat = collectionItemWidth
return CGSize(width: collectionItemWidth + size!.width + 40 , height: collectionViewHeight - 30 )
}
}
func collectionView(_ collection: UICollectionView, layout _: UICollectionViewLayout, minimumLineSpacingForSectionAt _: Int) -> CGFloat {
if collection == tagCollectioinView {
return 5
}
else {
return 5
}
}
func collectionView(_ collection: UICollectionView, layout _: UICollectionViewLayout, minimumInteritemSpacingForSectionAt _: Int) -> CGFloat {
if collection == tagCollectioinView {
return 5
}
return 5
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if collectionView == tagCollectioinView {
}
else if collectionView == suggectionCollectionView {
let str = suggestionArr[indexPath.row]
str_arr.append(str as! String)
suggestNextSentance(word: str as! String ) //Calling Suggesstion function
textStr = str_arr.joined(separator: " ")
tagCollectioinView.reloadData()
}
else {
guard let indexedCollectionView: IndexedCollectionView = collectionView as? IndexedCollectionView else {
fatalError("UICollectionView must be of IndexedCollectionView type")
}
let catIdict = categoryArr[collectionView.tag] as AnyObject
print(catIdict)
let id = catIdict["categoryID"] as! Int
let countArr = textByCategoryDict["\(id)"] as! NSArray
print(indexPath.row)
let word = countArr[indexPath.row]
print(word)
//Calling Suggesstion function
suggestNextSentance(word: word as? String ?? "")
str_arr.append(word as! String)
textStr = str_arr.joined(separator: " ")
tagCollectioinView.reloadData()
}
}