I have two collectionViews CollectionViewCell and CollectionViewCellButton that i want to place in first and second section of tableView respectively. I am debugging it by setting break point .
Here is my tableView.swift file cellForRowAt indexPath
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath.section == 0{
if let cell = tableView.dequeueReusableCell(withIdentifier: "tableviewcellid", for: indexPath) as? TableViewCell {
// Show SubCategory Title
(colorsArray.objectsArray[indexPath.section] as! TableViewCellModel).headerButton.setTitle("View All",for: .normal)
cell.category.text = (colorsArray.objectsArray[indexPath.section] as! TableViewCellModel).category
cell.headerButton.setTitle("View All", for: .normal)
// Pass the data to colletionview inside the tableviewcell
// debugging...
let v1 = colorsArray.objectsArray[indexPath.section]
// what is v1?
print(type(of: v1))
guard let thisTableCellModel = v1 as? TableViewCellModel else {
fatalError("Expected a TableViewCellModel !!!")
}
let v3 = thisTableCellModel.colors[indexPath.row]
// what is v3?
print("123Array=",type(of: v3)) // this is an Array, not a CollectionViewCellModel
guard let rowArray = v3 as? [CollectionViewCellModel] else {
fatalError("Expected a [CollectionViewCellModel] !!!")
}
// if we get here, we have properly unwrapped
// an array of CollectionViewCellModel
// so, don't make it an Array of Array
//cell.updateCellWith(row: [rowArray])
print("rowArray1=",type(of: rowArray))
cell.updateCellWith(row: rowArray)
cell.selectionStyle = .none
return cell
}
}
else if indexPath.section == 1{
if let cell = tableView.dequeueReusableCell(withIdentifier: "tableviewcellid", for: indexPath) as? TableViewCell {
(colorsArray.objectsArray[indexPath.section] as! TableViewCellModel).headerButton.setTitle("View All",for: .normal)
cell.category.text = (colorsArray.objectsArray[indexPath.section] as! TableViewCellModel).category
cell.headerButton.setTitle("View All", for: .normal)
// if let cell = ((colorsArray.objectsArray[indexPath.section] as! TableViewCellModel).colors as! CollectionViewCellModelButton)
// debugging...
let v1 = colorsArray.objectsArray[indexPath.section]
// what is v1?
print(type(of: v1))
guard let thisTableCellModel = v1 as? TableViewCellModel else {
fatalError("Expected a TableViewCellModel !!!")
}
let v3 = thisTableCellModel.colors[indexPath.row]
// what is v3?
print("123ArraynotNotmodel=",type(of: v3)) // this is an Array, not a CollectionViewCellModel
guard let rowArray = v3 as? [CollectionViewCellModelButton] else {
fatalError("Expected a [CollectionViewCellModelButton] !!!")
}
print("rowArray2=",type(of: rowArray))
cell.updateCellWith(row: rowArray) //break point
}
}
return UITableViewCell()
}
Here is updateCellWith method that is called in each section of tableView
func updateCellWith(row: [CollectionViewModel]) {
self.rowWithColors = row
self.collectionView.reloadData()
}
Here is TableViewCell.Swift file that has cellForItemAt indexPath for collectionView
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.section == 0
{
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionviewcellid", for: indexPath) as? CollectionViewCell {
// cell.imageView = UIImage(named: (rowWithColors?[indexPath.item].image)! )
// CollectionViewCellModel
/// [CollectionViewCellModelButton
print("index1=",indexPath.section)
cell.imageView.image = (self.rowWithColors?[indexPath.item] as! CollectionViewCellModel).imageView
cell.dicountAmountLabel.text = (self.rowWithColors?[indexPath.item] as! CollectionViewCellModel).dicountAmountLabel
cell.dicountLabel.text = (self.rowWithColors?[indexPath.item] as! CollectionViewCellModel).dicountLabel
cell.customerTypeLabel.text = (self.rowWithColors?[indexPath.item] as! CollectionViewCellModel).customerTypeLabel
cell.dicountAmountLabel.textColor = .white
cell.dicountLabel.textColor = .white
cell.customerTypeLabel.textColor = .white
return cell
}
}
else if indexPath.section == 1
{
print("index2=",indexPath.section)
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionviewcellButtonid", for: indexPath) as? CollectionViewCellButton {
// cell.imageView = UIImage(named: (rowWithColors2?[indexPath.item].image)! )
//if let model = self.rowWithColors?[indexPath.item] as? CollectionViewCellModelButton {
//model.collectionButton.setTitle(model.collectionButton, for: .normal)
//cell.collectionButton.titleLabel?.text = (self.rowWithColors?[indexPath.item] as! CollectionViewCellModelButton).collectionButton.setTitle("Hi", for: .normal)
cell.collectionButton.setTitle("Hi", for: .normal)
//
return cell
}
}
return UICollectionViewCell()
}
On setting breakPoint in cell.updateCellWith(row: rowArray) in indexPath.section == 1 of cellForRowAt indexPath of tableView.The debugger does not enter into indexPath.section == 1 of collectionView function cellForItemAt indexPath it revisit indexPath.section == 0 of collectionView Just for both section 0 and 1 of tableView cellForRowAt indexPath
It enter into indexPath.section == 0 of collectionView function cellForItemAt indexPath and give run time error.How i can make it run section 1 of collectionView function on section 1 of tableView.How display both CollectionView on View ?Just like in this figure
You can download the code from this 
Clearly you are holding array of CollectionViewModel (which is a protocol) and there are two different classes that confirms to this protocol CollectionViewCellModel and CollectionViewCellModelButton
and you blindly force cast both type to CollectionViewCellModel using
(self.rowWithColors?[indexPath.item] as! CollectionViewCellModel).imageView
Hence the crash.
Whats the issue?
There are way too many, I'll point out few relevant in this context. Your collectionView inside TableViewCell always receives an array of either CollectionViewCellModel or CollectionViewCellModelButton (One dimensional array)
In your code you hard code number of sections as 1
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
But strangely in your cellForItemAt indexPath you start checking indexPath.section == 0 or indexPath.section == 1, how can indexPath.section ever be 1 if your number of sections is hardcoded as 1?
Much more strangely you try to type cast the element in array rowWithColors based on indexPath.section
In your code you typecast (self.rowWithColors?[indexPath.item] as! CollectionViewCellModel) if indexPath.section == 0 and self.rowWithColors?[indexPath.item] as! CollectionViewCellModelButton if indexPath.section == 1
What you need?
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if let collectionViewCellModel = self.rowWithColors?[indexPath.row] as? CollectionViewCellModel,
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionviewcellid", for: indexPath) as? CollectionViewCell {
cell.imageView.image = collectionViewCellModel.imageView
cell.dicountAmountLabel.text = collectionViewCellModel.dicountAmountLabel
cell.dicountLabel.text = collectionViewCellModel.dicountLabel
cell.customerTypeLabel.text = collectionViewCellModel.customerTypeLabel
cell.dicountAmountLabel.textColor = .white
cell.dicountLabel.textColor = .white
cell.customerTypeLabel.textColor = .white
return cell
}
if let collectionViewCellModelButton = self.rowWithColors?[indexPath.row] as? CollectionViewCellModelButton,
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionviewcellButtonid", for: indexPath) as? CollectionViewCellButton
{
//customise `CollectionViewCellButton` here with `collectionViewCellModelButton` data
return cell
}
return UICollectionViewCell()
}
O/P:
TIP:
Not sure why you have cellForItemAtIndexPath with incorrect signature again in the same file, its good that its not getting called, but it let me wondering why? My advice, delete it :)