我已在主视图中成功创建了多个集合视图，在我的单元格内以编程方式创建标签，但每次集合视图刷新时，它都会创建与预览标签重叠的新标签。如何删除以前的数据并创建新资源而不覆盖？
Image 1 -> error displaying collectionview
这是我的代码。
CollectionViews的插座
@IBOutlet var collection1: UICollectionView!
@IBOutlet var collection2: UICollectionView!
@IBOutlet var collection3: UICollectionView!
@IBOutlet var collection4: UICollectionView!
代表收集
collection1.dataSource = self
collection1.delegate = self
collection1.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "Cell1")
collection1.backgroundColor = collectionBG
self.view.addSubview(collection1)
集合视图函数
// MARK: - COLLECTIONVIEW FUNC
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
var count: Int?
if collectionView == diasSemana{
count = dias.count
}
if collectionView == collection1{
count = instructores.count
}
if collectionView == collection2{
count = instructores.count
}
if collectionView == collection3{
count = instructores.count
}
if collectionView == collection4{
count = instructores.count
}
return count!
}
// MARK: - COLLECTIONVIEW FUNC
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
var cell: UICollectionViewCell?
if collectionView == diasSemana{
cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as UICollectionViewCell
let title = UILabel(frame: CGRect(x: CGFloat(15), y: CGFloat(0), width: CGFloat((cell?.bounds.size.width)!), height: CGFloat(30)))
//title.addTextSpacing(1.5)
title.font = UIFont(name:"GothamRounded-Book", size: 11)
title.tag = 16
title.text = dias[indexPath.row]
cell?.contentView.addSubview(title)
}
if collectionView == collection1{
cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell1", for: indexPath) as UICollectionViewCell
cell?.backgroundColor = .white
let title = UILabel(frame: CGRect(x: CGFloat(20), y: CGFloat(20), width: CGFloat((cell?.bounds.size.width)!), height: CGFloat(15)))
//title.addTextSpacing(1.5)
title.font = UIFont(name:"GothamRounded-Book", size: 11)
title.tag = 17
title.text = instructores[indexPath.row]
//print("have created an new item \(title.text)")
cell?.contentView.addSubview(title)
let txt = UILabel(frame: CGRect(x: CGFloat(15), y: CGFloat(35), width: CGFloat((cell?.bounds.size.width)!), height: CGFloat(10)))
//title.addTextSpacing(1.5)
txt.font = UIFont(name:"GothamRounded-Book", size: 11)
txt.tag = 18
txt.text = horas[indexPath.row]
cell?.contentView.addSubview(txt)
}
if collectionView == collection2{
cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell2", for: indexPath) as UICollectionViewCell
cell?.backgroundColor = .white
let title = UILabel(frame: CGRect(x: CGFloat(20), y: CGFloat(20), width: CGFloat((cell?.bounds.size.width)!), height: CGFloat(15)))
//title.addTextSpacing(1.5)
title.font = UIFont(name:"GothamRounded-Book", size: 11)
title.tag = 19
title.text = instructores[indexPath.row]
cell?.contentView.addSubview(title)
let txt = UILabel(frame: CGRect(x: CGFloat(15), y: CGFloat(35), width: CGFloat((cell?.bounds.size.width)!), height: CGFloat(10)))
//title.addTextSpacing(1.5)
txt.font = UIFont(name:"GothamRounded-Book", size: 11)
txt.tag = 20
txt.text = horas[indexPath.row]
cell?.contentView.addSubview(txt)
}
if collectionView == collection3{
cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell3", for: indexPath) as UICollectionViewCell
cell?.backgroundColor = .white
let title = UILabel(frame: CGRect(x: CGFloat(20), y: CGFloat(20), width: CGFloat((cell?.bounds.size.width)!), height: CGFloat(15)))
//title.addTextSpacing(1.5)
title.font = UIFont(name:"GothamRounded-Book", size: 11)
title.tag = 21
title.text = instructores[indexPath.row]
cell?.contentView.addSubview(title)
let txt = UILabel(frame: CGRect(x: CGFloat(15), y: CGFloat(35), width: CGFloat((cell?.bounds.size.width)!), height: CGFloat(10)))
//title.addTextSpacing(1.5)
txt.font = UIFont(name:"GothamRounded-Book", size: 11)
txt.tag = 22
txt.text = horas[indexPath.row]
cell?.contentView.addSubview(txt)
}
if collectionView == collection4{
cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell4", for: indexPath) as UICollectionViewCell
cell?.backgroundColor = .white
let title = UILabel(frame: CGRect(x: CGFloat(20), y: CGFloat(20), width: CGFloat((cell?.bounds.size.width)!), height: CGFloat(15)))
//title.addTextSpacing(1.5)
title.font = UIFont(name:"GothamRounded-Book", size: 11)
title.tag = 23
title.text = instructores[indexPath.row]
cell?.contentView.addSubview(title)
let txt = UILabel(frame: CGRect(x: CGFloat(15), y: CGFloat(35), width: CGFloat((cell?.bounds.size.width)!), height: CGFloat(10)))
//title.addTextSpacing(1.5)
txt.font = UIFont(name:"GothamRounded-Book", size: 11)
txt.tag = 24
print("----------------------------------------------------\n\n\(horas)")
print(horas[indexPath.row])
txt.text = horas[indexPath.row]
cell?.contentView.addSubview(txt)
}
return cell!
}
// MARK: - COLLECTION VIEW FUNC
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if collectionView == diasSemana{
print(dias[indexPath.row])
}else if collectionView == collection1 {
print(instructores[indexPath.row])
self.nombreInstructor = instructores[indexPath.row]
print(horas[indexPath.row])
hora = "\(horas[indexPath.row])"
usrDefaults.set(nombreInstructor, forKey: "INSTRUCTOR")
performSegue(withIdentifier: "clase_Seleccionada", sender: nil)
dia = "LUN 30"
}
if collectionView == collection2{
print(instructores2[indexPath.row])
self.nombreInstructor = instructores2[indexPath.row]
print(horas2[indexPath.row])
hora = "\(horas2[indexPath.row])"
performSegue(withIdentifier: "clase_Seleccionada", sender: nil)
dia = "MAR 31"
}
if collectionView == collection3{
print(instructores3[indexPath.row])
self.nombreInstructor = instructores3[indexPath.row]
print(horas3[indexPath.row])
hora = "\(horas3[indexPath.row])"
performSegue(withIdentifier: "clase_Seleccionada", sender: nil)
dia = "MIE 01"
}
if collectionView == collection4{
print(instructores4[indexPath.row])
self.nombreInstructor = instructores4[indexPath.row]
print(horas4[indexPath.row])
hora = "\(horas4[indexPath.row])"
performSegue(withIdentifier: "clase_Seleccionada", sender: nil)
dia = "JUE 02"
}
}
每次点击上面的按钮（PARK，147，Masaryk）时，它都会刷新。