Multiple Collection Views with same XIB Cell and button - ios

Question

I have a View Controller with multiple Collection Views.
Each collection view is using the same custom cell with xib. In this xib i have a button.
The collectionViews names are
1) manPerfumeCV
2) womanPerfumeCV
3) kidsPerfumeCV
Inside cellForItemAt i have cell.productCart.tag = indexPath.row
let cell:iPhoneCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "iPhoneCell", for: indexPath) as! iPhoneCollectionViewCell
if collectionView == self.womanPerfumeCV {
let prods = womanPerfumeData[indexPath.row]
cell.configureCell(products: prods)
cell.productCart.tag = indexPath.row
} else if collectionView == self.manPerfumeCV {
let prods = manPerfumeData[indexPath.row]
cell.configureCell(products: prods)
cell.productCart.tag = indexPath.row
} else if collectionView == self.kidsPerfumeCV {
let prods = kidsPerfumeData[indexPath.row]
cell.configureCell(products: prods)
cell.productCart.tag = indexPath.row
}
and in the same view controller i have this action for the button from the xib file
#IBAction func iPhoneAddToCart(_ sender: AnyObject) {
let butt = sender as! UIButton
let indexP = IndexPath(row: butt.tag, section: 0)
let cell = manPerfumeCV.cellForItem(at: indexP) as! iPhoneCollectionViewCell
print(manPerfumeData[indexP.row].price)
}
Each collection view has its own [Products] array.
1) manPerfumeData
2) womanPerfumeData
3) kidPerfumeData.
In my code if i tap at the button which is at the 1st collection view with manPerfumeData it prints the price very well.
Although if i push the button on the 2nd or 3rd collection view the app crashes.
Is there any way to know from wich collection view he pushed the button so i can load the spesific [Products] array ??
Thanks!

Answer 1

You can use tag property of UIButton.
Let consider your code
let cell:iPhoneCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "iPhoneCell", for: indexPath) as! iPhoneCollectionViewCell
if collectionView == self.womanPerfumeCV {
//Your Code
cell.productCart.tag = indexPath.row + 1000
} else if collectionView == self.manPerfumeCV {
//Your Code
cell.productCart.tag = indexPath.row + 2000
} else if collectionView == self.kidsPerfumeCV {
//Your Code
cell.productCart.tag = indexPath.row + 3000
}
You noticed that I changed the tag property of UIButton. Now when tap on button, check tag property of UIButton. Like this
if (sender.tag >= 1000 && sender.tag<2000)
{
//manPerfumeCV
}
else if (sender.tag >= 2000 && sender.tag<3000)
{
//womanPerfumeCV
}
else
{
//kidsPerfumeCV
}
For fetching value from array, subtract the beginning value from tag property and you will get value, like this
For manPerfumeCV
indexValue = sender.tag - 1000
For womanPerfumeCV
indexValue = sender.tag - 2000
For kidsPerfumeCV
indexValue = sender.tag - 3000
This value can directly use for getting data from array.

Answer 2

inorder to achieve it you can add tag property to the collectionViews in viewDidLoad
override func viewDidLoad() {
// your code
self.womanPerfumeCV.tag = 0;
self.manPerfumeCV.tag = 1;
self.kidsPerfumeCV = 2;
}
using this you can identify the source
// Now its time to listen to the buttonEvent
I would suggest to keep the event listener in the same controller or make a protocol callback only with index and tag. To keep it simple lets make the changes in same viewController File
if collectionView == self.womanPerfumeCV {
let prods = womanPerfumeData[indexPath.row]
cell.configureCell(products: prods)
cell.productCart.tag = indexPath.row
} else if collectionView == self.manPerfumeCV {
let prods = manPerfumeData[indexPath.row]
cell.configureCell(products: prods)
cell.productCart.tag = indexPath.row
} else if collectionView == self.kidsPerfumeCV {
let prods = kidsPerfumeData[indexPath.row]
cell.configureCell(products: prods)
cell.productCart.tag = indexPath.row
}
cell.yourButton.tag = (collectionView.tag * 1000 )+(indexPath.row);
cell.yourButton.addTarget(self, action: #selector(ButtonClicked(_:)), forControlEvents: .TouchUpInside)
now add selector to event
func ButtonClicked(sender: UIButton) {
let index : Int = sender.tag % 1000;
switch sender.tag {
case let x where x < 1000:
loadDataFromFirstArrayWithIndex(index);break;
case let x where x <2000:
loadDataFromSecondArrayWithIndex(index);break;
default:
loadDataFromThirdArrayWithIndex(index);
}
}