didSelectItemAt not working from SCLAlertView - ios

Question

I am using SCLAlertView to create custom alert view. My alert view contains one text field and collection view of coloured cells
Problem is that UICollectionView's didSelectItemAt method is not working. I think problem is because it is like subview. But I can't fix it.
I have one collection view at UIViewController and that method is working. Here's my code
var collectionViewAlert: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 1, left: 1, bottom: 1, right: 1)
layout.itemSize = CGSize(width: 25, height: 25)
collectionViewAlert = UICollectionView(frame: CGRect(x: 18, y: 10, width: 250, height: 25), collectionViewLayout: layout)
collectionViewAlert.dataSource = self
collectionViewAlert.delegate = self
collectionViewAlert.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "CollCell")
collectionViewAlert.backgroundColor = UIColor.white
}
#IBAction func addCategory(_ sender: Any) {
let alertView = SCLAlertView()
alertView.addTextField("Enter category name")
let subview = UIView(frame: CGRect(x:0,y:0,width:216,height:70))
subview.addSubview(self.collectionViewAlert)
alertView.customSubview = subview
alertView.showEdit("Choose color", subTitle: "This alert view has buttons")
}
let reuseIdentifier = "cell" // also enter this string as the cell identifier in the storyboard
var colors = [UIColor.red, UIColor.yellow, UIColor.green, UIColor.blue, UIColor.cyan]
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.colors.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
// get a reference to our storyboard cell
if (collectionView == self.collectionViewAlert) {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CollCell", for: indexPath as IndexPath)
cell.backgroundColor = self.colors[indexPath.item]
return cell
}
else {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath as IndexPath)
cell.backgroundColor = self.colors[indexPath.item]// make cell more visible in our example project
return cell
}
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print("You selected cell #\(indexPath.item)!")
}
}
More screens here: screens
EDIT:
I still not found answer how to solve this problem. I think problem is subview interaction, because delegate method cellForItemAt is invoked on alert show. Someone know how to figure this out? screen from view hierarchy
Thanks for any help.

Answer 1

I have looked into SCLAlertView code. It seems it uses a tap recognizer for dismissing the keyboard.
Tap recognizer can conflict with the tap recognizer used by collection view.
To disable the recognizer in SCLAlertView you can use an appearance object:
let appearance = SCLAlertView.SCLAppearance(
disableTapGesture: true
)
let alertView = SCLAlertView(appearance: appearance)

Answer 2

You can also add extension for CollectionView delegate:
extension ViewController: UICollectionViewDelegate
{
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print("You selected cell #\(indexPath.item)!")
}
}
If you have added any UIImageView or UILabel inside UICollectionViewCell make sure you have enabled UserIntraction, because for both UIImageView or UILabel default as false.
setUserIntraction for both UIImageView or UILabel as TRUE.

Answer 3

You need to add collectionview delegate in protocol section. And be sure that you have make outlets of your object.

Answer 4

First of all you need to update like:
class YourViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {
}
And then in viewDidLoad:
collectionView.delegate = self
collectionView.dataSource = self
collectionView.reloadData()
And make sure that your objects are properly connected.