CODEWITHSUNDEEP
iosswiftswift3uicollectionview
tekun
tekun

Reputation: 71

How can I select specific indexpath of a UICollectionView by default?

I want to highlight the specific cell of the UICollectionView by default.
However I can not do that.The code is below.

UIView(in the init method):

    let selectedIndexPath = IndexPath(item: 0, section: 0)
    collectionView.selectItem(at: selectedIndexPath, animated: false, scrollPosition: [])

UICollectionViewCell:

override var isSelected: Bool {
    didSet {
        imageView.tintColor = isSelected ? UIColor.white : UIColor.red
    }
}

How can I select specific indexpath of a UICollectionView by default ? If you need any other information to solve it, let me know. Thank you.

Upvotes: 1

Views: 3607

Answers (2)

tekun
tekun

Reputation: 71

This only selects the first cell

func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
    //add here
    let selectedIndexPath = IndexPath(item: 0, section: 0)
    collectionView.selectItem(at: selectedIndexPath, animated: false, scrollPosition: [])
}

Upvotes: 2

Marina
Marina

Reputation: 1196

You should override this method

override func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
//you should set needed cells as selected here, or set it to deselected, because it is your responsibility now 
    var shouldSelect = false //or true
    cell.isSelected = shouldSelect
}

But in this case you should keep track of collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) method and reload collection while selection.

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    collectionView.reloadData()
//or reload sections 
}

Upvotes: 0

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