CODEWITHSUNDEEP
iosswiftuicollectionview
OriginalAlchemist
OriginalAlchemist

Reputation: 411

Swift: Update CollectionView Cell Image

Im making a game that has a collectionView character select at the bottom of the GameScene. Many of the characters are locked, so i display a "Locked" image as the collection view cell image. However, when the user unlocks the character and they load the GameScene again(move to gameOver scene, restart the game back to present GameScene), i need to update the collectionView cells images and swap out the "Locked" image with the regular image. Ive tried so many different things but it isn't working. It won't swap out/reload the new images. I know its just something small I'm missing but heres all my code associated with the collection view.

class CharactersCollectionViewCell: UICollectionViewCell {

//MARK : Public API
var characters : NACharacters!{
    didSet{
        updateUI()
    }
}

//MARK : Private
@IBOutlet weak var featuredImageView: UIImageView!


private func updateUI(){
    self.layer.borderColor = UIColor.whiteColor().CGColor
    self.layer.borderWidth = 2.5
    self.layer.masksToBounds = true
    self.layer.cornerRadius  = CGFloat(roundf(Float(self.frame.size.width/2.0)))
    featuredImageView.image = characters.featuredImage
}

}

class NACharacters {

var featuredImage : UIImage!

static var characterLineUp = [NACharacters]()

init(featuredImage: UIImage){

    self.featuredImage = featuredImage
}

static func createCharacters() -> [NACharacters]{

    print("Inside create character")

    characterLineUp.insert(NACharacters(featuredImage: UIImage(named: "DiploSquadCollectionView")!), atIndex: 0)


    characterLineUp.insert(NACharacters(featuredImage: UIImage(named: "LockedNBAPlayersCollectionView")!), atIndex: 1)
    if(NSUserDefaults().unlockNBAPlayers == true){
        characterLineUp[1].featuredImage = UIImage(named: "NBAPlayersCollectionView")!
    }


    characterLineUp.insert(NACharacters(featuredImage: UIImage(named: "LockedLeanSquadCollectionView")!), atIndex: 2)
    if(NSUserDefaults().totalDabs >= 10000){
        print("setting up lean to be unlocked")
        characterLineUp[2].featuredImage = UIImage(named: "LeanSquadCollectionView")!
    }

    return characterLineUp
  }
}

//Inside Game View Controller
@IBOutlet var collectionView: UICollectionView!

//MARK : Data Source
internal var characters = NACharacters.createCharacters()

extension GameViewController : UICollectionViewDataSource, UICollectionViewDelegate{

func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
    return 1
}

func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return characters.count
}

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier(Storyboard.CellIdentifier, forIndexPath: indexPath) as! CharactersCollectionViewCell

    cell.characters = self.characters[indexPath.item]

    return cell
}

//Inside Game Scene
    var collectionView: UICollectionView? {
    return self.view?.subviews.filter{ $0 is UICollectionView }.first as? UICollectionView
}

override func didMoveToView(view: SKView) {
//INSIDE HERE I NEED TO UPDATE THE COLLECTION VIEW CELL IMAGES
}

I know this looks like a lot of code but most of it is pretty standard. I show you all of this so that we can pin point exactly whats wrong or what needs to be done to get this to work. This is all of my code associated with the collectionView.

Upvotes: 1

Views: 2458

Answers (2)

David Williames
David Williames

Reputation: 1109

When you need to 'refresh' a Collection View, tell it to reload its data, then all the images should update as needed.

collectionView.reloadData()

Upvotes: 0

JAck
JAck

Reputation: 864

Have you try this in same place :: 

imageView.image = nil

then set the image you want to update as ..

imageView.image = UIImage(named : "YourImage")

Upvotes: 3

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