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?

score 4 · Accepted Answer · answered Apr 08 '16 at 03:06

4

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)

answered Apr 08 '16 at 03:06

Jeff

166
5

I tried that but it didn't help, I'm still not able to display any message while clicking cells... I thought it might be caused by the fact that I didn't put the `override` word before the `func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)` but then when I did that I got a message that `Method does not override any method from its superclass`... Is there anything else I might miss? – user3766930 Apr 08 '16 at 11:30
UICollectionViewDelegate is a protocol, there is no need to add `override` keywords. You can check the uicollectionView's `allowsSelection` , it should be true. – Jeff Apr 08 '16 at 11:54

score 3 · Answer 2 · answered Jan 06 '19 at 19:38

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.

score 1 · Answer 3 · edited May 13 '20 at 08:22

1

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!

edited May 13 '20 at 08:22

huwr

1,720
3
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answered Apr 10 '20 at 04:47

Chloe Yan

11
3

Hi Chloe! Can you please add an explanation as to why that was the solution? Welcome to SO! – regina_fallangi Apr 10 '20 at 05:28

score 0 · Answer 4 · answered Apr 08 '16 at 02:34

0

Do make sure the user interaction is enabled in storyboard

answered Apr 08 '16 at 02:34

zhenkai

1
2

It is enabled, so it must be something else :( – user3766930 Apr 08 '16 at 11:27
another possible issue is you set the tview.delegate = self, tview.dataSource = self in viewWillAppear, please do this in viewdidload! Hope it help – zhenkai Apr 11 '16 at 03:23

score 0 · Answer 5 · answered Jan 03 '20 at 11:29

0

I had to change scroll direction from vertical to horizontal in storyboard and it worked for me.

answered Jan 03 '20 at 11:29

Ruchi

411
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score 0 · Answer 6 · answered May 23 '21 at 17:28

0

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...

answered May 23 '21 at 17:28

Andy Weinstein

2,639
3
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Why is my UICollectionView cell not clickable in my swift ios app?

6 Answers6