CODEWITHSUNDEEP
arraysswiftstruct
Robert
Robert

Reputation: 545

Append array value to struct

I have following struct:

    struct PalletScan: Codable {
            var deliveryId: String?
            var userId: String?
            var timestamp: String?
            var tempPalletNr: String?
            var tempLocation: String?
            var tempPalletType: String?
            var pallets: [MovementScan]?

            //coding keys requried for translation API -> struct -> CoreData and CoreData -> struct -> API
            enum CodingKeys: String, CodingKey {
                case deliveryId = "TOID"
                case userId = "UserId"
                case timestamp = "TimeStamp"
            }

    mutating func appendMovementScan() {
                var movementScan = MovementScan()
                movementScan.locationId = self.tempLocation
                movementScan.palletId = self.tempPalletNr
                movementScan.palletType = self.tempPalletType
                movementScan.timestamp = String(Date().timeIntervalSince1970)
                print(movementScan)
                self.pallets?.append(movementScan)

            }

}

however self.pallets?.append(movementScan) does not adding anything to the pallets array. What am I missing? It must be trivial but can not find mistake.

Upvotes: 1

Views: 49

Answers (2)

Subash thapa
Subash thapa

Reputation: 57

var pallet is not initialized and it is an optional so when you append movementscan using ? , it wont be executed.

To fix this you have to some how initialize pallets array before appending to it . One way can be simply initialize with empty array :

var pallets = [MovementScan]()

Upvotes: 0

Abdelahad Darwish
Abdelahad Darwish

Reputation: 6067

Just change var pallets: [MovementScan]?
to var pallets: [MovementScan] = [MovementScan]()

as @Carcigenicate you call append on nil value

Upvotes: 1

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