What is Causing these Memory Leaks in my Swift code? - ios

Question

Is there anyone who can tell my why my code is getting the following four memory leaks (as indicated below) and the code changes that need to be made to rectifiy it? It is a collectionNode I have created which has a dataSource and delegate and performing leak profiling indicates the four leaks.
weak var dataSource: CollectionNodeDataSource? { didSet{ setupData() } }
public func setupData() {
let numberOfItems = dataSource!.numberOfItems() //LEAK 4bytes
var j: Int = 0
for i in numberOfCells/2..<numberOfCells {
let item = dataSource!.collectionNode(self, itemFor: i) //LEAK 4bytes
item.index = i
item.id = j
array_cells.append(item)
j = j == numberOfItems-1 ? 0 : j+1
}
j = numberOfItems-1
if array_cells[0].nameLabel != nil { cellHeight = array_cells[0].nameLabel!.frame.size.height } //LEAK 25bytes
for i in (0...(numberOfCells/2)-1).reversed() {
let item = dataSource!.collectionNode(self, itemFor: i)
item.index = i
item.id = j
array_cells.insert(item, at: 0)
j = j == 0 ? numberOfItems-1 : j-1
cumultive_posY = cumultive_posY + cellHeight + spaceBetweenItems
}
for item in array_cells { itemNode?.addChild(item) } //LEAK 4bytes
if currentIndex == -1 {
currentIndex = numberOfCells/2
} else {
if let id = array_cells[currentIndex].id { currentIndex = (numberOfCells/2)+id }
}
biggestItem = array_cells.sorted{ $0.calculateAccumulatedFrame().size.height > $1.calculateAccumulatedFrame().size.height }.first! //LEAK 23b
setSpacing()
DispatchQueue.main.async { [weak self] in //LEAK 1 byte
self?.snap(to: self!.currentIndex, withDuration: 0)
self?.updateItemAppearance(aboutIndex: self!.currentIndex)
self?.itemNode?.isHidden = false
}
}
protocol CollectionNodeDataSource: class {
func numberOfItems() -> Int
func collectionNode(_ collection: CollectionNode, itemFor index: Index) -> CollectionNodeItem
}
The data model is as follows:
public class CapOptionsModel {
static var `default`: CapOptionsModel = CapOptionsModel()
let array_options = [ApetureCapSpinnerOption(mode: .liveStream, name: "Stream", image: #imageLiteral(resourceName: "ButtonTip_LiveStream")),
ApetureCapSpinnerOption(mode: .sessionCapture, name: "Capture", image:#imageLiteral(resourceName: "ButtonTip_SessionCapture"))]
private init() {
}
}
And the CollectionNodeItem is as like so:
class CollectionNodeItem: SKNode {
fileprivate weak var collection: CollectionNode? { return self.parent as? CollectionNode }
weak var nameLabel: SKLabelNode?
weak var imageNode: SKSpriteNode?
var id : Int!
var index : Index!
public override init() {
super.init()
isUserInteractionEnabled = true
let nameLabel = SKLabelNode(fontNamed: FONT_EUROEXT)
addChild(nameLabel)
self.nameLabel = nameLabel
let imageNode = SKSpriteNode()
addChild(imageNode)
self.imageNode = imageNode
}
required public init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented") }
}