[英]Way to dequeue multiple cells in UIcollectionview
根据屏幕截图,我将有一个很大的collectionview,其中包含几个单元格(带有颜色)。 除绿色单元格外,所有单元格仅在视图中显示一次,绿色单元格将显示一组用户。
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.item == 0{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: topfeatureCellIndent, for: indexPath) as! topFeatureCell
//configure if needed
return cell
}else if indexPath.item == 1{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: userCellIdent, for: indexPath) as! featureUserContainerViewCell
cell.featureUsers = featureUser
cell.selectUserdelegate = self
return cell
}else if indexPath.item == 2{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: ticketLabelIdent, for: indexPath) as! ticketLabelCell
return cell
} else if indexPath.item == 3{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: whosgoingIdent, for: indexPath) as! whoGoingCell
cell.config(withTimer: timeleft)
return cell
}
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: allUserCellIdent, for: indexPath) as! allUserCell
let index = indexPath.item - 4
let user = allPartyUserArr![index]
cell.config(withUser: user)
return cell
我需要显示最后一个单元格的方式是通过实现上面的代码,但是我认为它是不正确的,因为如果我想在显示所有单元格后添加其他单元格,还有什么更好的方法来使该单元格正确出队?
我建议您在UICollectionView中使用2节。 将所有一次性可见单元格保留在第0节中,并将代表用户数组的单元格保留在第1部分中
这是设置节数的方法
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 2
}
要设置每个部分的标题,您可以实现以下功能并为标题设置任何大小。 CGSizeMake(0,0)将隐藏标题
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
return CGSize(width : 0, height : 0) // Header size
}
然后每个部分中的项目数
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if section == 0 {
return 4
}
else {
users.count
}
//return (section == 0) ? 4 : users.count
}
显示单元格
public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.section == 0 {
// Based on Your implementation
if indexPath.item == 0{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: topfeatureCellIndent, for: indexPath) as! topFeatureCell
//configure if needed
return cell
}else if indexPath.item == 1{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: userCellIdent, for: indexPath) as! featureUserContainerViewCell
cell.featureUsers = featureUser
cell.selectUserdelegate = self
return cell
}else if indexPath.item == 2{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: ticketLabelIdent, for: indexPath) as! ticketLabelCell
return cell
} else if indexPath.item == 3{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: whosgoingIdent, for: indexPath) as! whoGoingCell
cell.config(withTimer: timeleft)
return cell
} else {
return UICollectionViewCell()
}
}else{
//make sure the identifier of your cell for second section
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: allUserCellIdent, for: indexPath) as! allUserCell
// populate your user cell here
return cell
}
}
您可以像这样在CollectionView
设置节数:
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 5
}
设置每个section
的项目数:
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
switch section {
case 0:
return 1
default:
return 3
}
}
您可以根据本section
设置的项目数。
对于每个section
cells
:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
switch indexPath.section {
case 0:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: topfeatureCellIndent, for: indexPath) as! topFeatureCell
//configure if needed
return cell
case 1:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: userCellIdent, for: indexPath) as! featureUserContainerViewCell
cell.featureUsers = featureUser
cell.selectUserdelegate = self
return cell
case 2:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: ticketLabelIdent, for: indexPath) as! ticketLabelCell
return cell
case 3:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: topfeatureCellIndent, for: indexPath) as! topFeatureCell
//configure if needed
return cell
case 4:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: whosgoingIdent, for: indexPath) as! whoGoingCell
cell.config(withTimer: timeleft)
return cell
default:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: allUserCellIdent, for: indexPath) as! allUserCell
let index = indexPath.item - 4
let user = allPartyUserArr![index]
cell.config(withUser: user)
return cell
}
}
希望对您有所帮助,否则您可以在Google上搜索更多更好的教程和解决方案。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.