Unable to assign class objects to dictionary member of another class object in Swift 3 - ios

Question

I have a class ChessSquare with its own attributes and methods. I have another class ChessBoard, which has an attribute of dictionary type.
class ChessBoard {
var squares: [ Int : ChessSquare ] = [:]
.....
One of the methods of the ChessBoard class builds the chessSquare object and assigns it to chessBoard object as below.
self.squares[squareName] = chessSquare
Before Swift3 this code was working fine. After upgrading to Swift3 the assignment stopped working.
Using breakpoints I see that chessSquare objects are built as expected. squareName variable has the expected value. The "self", which is the chessBoard object has proper initial values. But the dictionary assignment gets skipped without any error in the above mentioned code.
Is this anything related to Swift3. I browsed and could not get specific solution to my case.
Adding more code for clarity.
class ChessSquare {
let squareColor: UIColor
let squareShade: Int
let squareName: Int
let squareSize: CGSize
let minXY: CGPoint
let maxXY: CGPoint
let squareOrigin: CGPoint
var hasPiece = false
weak var chessPiece: ChessPiece?
let squareSprite: SKSpriteNode
let squareType: SquareType
//more data members
init(squareColor: UIColor, squareShade: Int, squareName: Int, squareSize: CGSize, minXY: CGPoint, maxXY: CGPoint, squareOrigin: CGPoint, squareSprite: SKSpriteNode, squareType: SquareType) {
self.squareColor = squareColor
self.squareShade = squareShade
self.squareName = squareName
self.squareSize = squareSize
self.minXY = minXY
self.maxXY = maxXY
self.squareOrigin = squareOrigin
self.squareSprite = squareSprite
self.squareType = squareType
}
//more methods
}
class ChessBoard {
var squares: [ Int : ChessSquare ] = [:]
var byteBoard: [UInt8] = [UInt8](repeating: UInt8(0), count: 66)
var byteBoardHashVal: Int = 0
// [ byteBoardHashVal : ((byteBoard, evalnVal), repCnt) ]
var byteBoards: [Int : (([UInt8],Double?), Int)] = [:]
var TT: [Int : Double] = [:]
var TTReuseCount = 0
var whitePawnlessFileByte: UInt8 = 255
var blackPawnlessFileByte: UInt8 = 255
var maxXY: CGPoint = CGPoint()
var minXY: CGPoint = CGPoint()
var oldTouchedSquare: ChessSquare?
init() {
squares = [:]
byteBoard = [UInt8](repeating: UInt8(0), count: 66)
byteBoardHashVal = 0
byteBoards = [:]
TT = [:]
TTReuseCount = 0
whitePawnlessFileByte = 255
blackPawnlessFileByte = 255
}
func drawFlippedChessBoard(_ view: SKView, scene: GameScene) {
....
....
for row in 0..<8 {
for col in 0..<8 {
let squareName = row * 8 + col
....
let chessSquare = ChessSquare(squareColor: currentColor, squareShade: squareShade, squareName: squareName, squareSize: squareSize, minXY: minXY, maxXY: maxXY, squareOrigin: squareOrigin, squareSprite: squareSprite, squareType: squareType)
....
self.squares[squareName] = chessSquare
....
}
....
}
....
}
//more methods
}

Answer 1

I have a difficulty in understanding if squareName is a string or a integer. It sounds like a string, I would suggest to name it chessSquareIndex or squareIndex if in case it is Int and you want to index chess square.
Based on your comment above I did a small test to verify that it works correctly if squareName is Int and here is the result,
class ChessSquare { }
class ChessBoard {
var squares: [ Int : ChessSquare ] = [:]
func getChessSquare(at squareIndex: Int) {
let chessSquare = ChessSquare()
return squares[squareIndex] = chessSquare
}
}
And this seems to work fine with Swift 3. Also notice that it is not required to call self, unless you are inside escaping closures.