Disable selection after an array has reached a limit

Question

I'm using a HTagView library to display a list of tags. I have populated the tags and now I want to limit the selection of up to 3. Here is where I'm attempting this:

var selectedInterests = [Int]()



func tagView(_ tagView: HTagView, tagSelectionDidChange selectedIndices: [Int]) {



    selectedInterests.removeAll()



    for i in selectedIndices {

        selectedInterests.append(i)



        if selectedInterests.count > 3 {

            print("limit reached")

            selectedInterests.removeLast()

            tagView.reloadData()

        }

    }

}

I've attempted to remove the last item of the array but this also doesn't work. Most examples are showing this example based on the indexPath of a table or collectionView. How do I achieve it with out either of the two?

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Answer 1

All you need to do is to immediately deselect the tag if the amount of already selected tags is greater than 3. I would also make the amount as a variable that you can easily change the value of:

var maxTagsSelected = 3

func tagView(_ tagView: HTagView, tagSelectionDidChange selectedIndices: [Int]) {
    if selectedIndices.count > maxTagsSelected {
        tagView.deselectTagAtIndex(selectedIndices[maxTagsSelected])
    }
}

The variable maxTagsSelected will always be the index of the last element in selectedIndices.

Disable selection after an array has reached a limit

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