I’ve a struct that contains some CGPoint & array of tuple:

typealias MapNode = (color: UIColor, location: CGPoint)

struct MapCollectionNode  {
    var position: CGPoint
    var containedLocations: [MapNode]
}

Then I’ve an Array consists of MapCollectionNode:

    var nodeCollection = [MapCollectionNode]()

Since NSCoding doesn’t support struct and tuple, I had to first break down the nodeCollection as following:

var position = [CGPoint]()
var nodes = [[MapNode]]()
for n in nodeCollection {
    position.append(n.position)
    nodes.append(n.containedLocations)
}

then I had to further break down the tuples within nodes as following:

var color = [SKColor]()
var location = [CGPoint]()

for i in 0..<nodes.count {
    for j in nodes[i] {
        color.append(j.color)
        location.append(j.location)
    }
}

At this point I’m able to encode all the information I needed:

aCoder.encode(position, forKey: "MapClass.position")
aCoder.encode(color, forKey: "MapClass.color")
aCoder.encode(location, forKey: "MapClass.location")

At the time of decoding, I’ve them all decoded as following:

let position = aDecoder.decodeObject(forKey:  "MapClass.position") as? [CGPoint]
let color = aDecoder.decodeObject(forKey:  "MapClass.color") as? [SKColor]
let location = aDecoder.decodeObject(forKey:  "MapClass.location") as? [CGPoint]

However, I’m stuck on how to put them back into variable nodeCollection which is an Array of MapCollectionNode.

Any help would be appreciated.