Why is my UICollectionView cell not clickable in my swift ios app?

Question

I'm using UICollectionView in my swift class, it's placed on my UIViewController . I connected the collectionView to the outlet in my code, I set up delegate and datasource and I see the outcome in my app. Everything works besides the fact that when I click each cell - nothing happens.

My code is as follows:

class UsersList: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {


@IBOutlet weak var tview: UICollectionView!

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)

    tview.backgroundColor = UIColor.whiteColor() //this works
    tview.delegate = self
    tview.dataSource = self
}

func collectionView(tview: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
    print("You selected cell #\(indexPath.item)!")
    //this does not appear in the console :(
}

Is there anything else I could do to see the print msg in the console?

Answer 1

In swift, the parameter name and function name identify a function together. UICollectionViewDelegate have function

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)

but not

func collectionView(tview: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)

Answer 2

Try removing all of your UIGestures from the view then test to see if the UICollectionView Cells are able to be interacted with normally.

In my case, I had to remove the lines:

let tap = UITapGestureRecognizer(target: self, action: #selector(dismissKeyboard))
    self.view.addGestureRecognizer(tap)

For some reason this was getting in the way of being able to click on my cells.

Answer 3

For me, I had to set the UICollectionView 's delegate. For example, in viewDidLoad() :

collectionView.delegate = self

This is necessary or the delegate methods will not be called!

Answer 4

请确保在故事板中启用了用户交互

Answer 5

我不得不在情节提要中将滚动方向从垂直更改为水平，这对我有用。

Answer 6

My problem was that isUserInteractionEnabled was false for the parent view of the collectionView. I had taken the code for the parent view from somewhere else where evidently that had been the right thing to do. But not here... Sigh...