create array from class in swift

Question

I can't seem to create an array that contains an user. I have to create and array of 10 users.. How do I properly create it?

import UIKit

enum DeviceType {
    case Phone, Tablet, Watch
}

enum OperatingSystemType {
    case iOS, Android, Windows
}

struct OperatingSystemVersion {
    var Major: Int
    var Minor: Int
    var Patch: Int
}

struct OperatingSystem{
    var type: OperatingSystemType
    var version: OperatingSystemVersion

}

class Device {
    var DeviceID: Int
    var Type: DeviceType
    var Operating_System: OperatingSystem
    var UserID: Int
    var Description: String
    var InventoryNR: String
    init () {
        DeviceID = 1233
        Type = .Phone
        Operating_System = OperatingSystem(type: .iOS, version: OperatingSystemVersion(Major: 9, Minor: 0, Patch: 2))
        UserID = 2
        Description = "took"
        InventoryNR = "no17"
    }
}

class User {
    var UserID: Int
    var Username: String
    var Location: String
    var Devices: [Device]
    init() {
        UserID = 566
        Username = "david"
        Location = "Fortech"
        Devices = [Device.init()]
    }
}

var Users = [User] ()
Users.append(UserID: 23, Username: "David", Location: "HQ", Devices : User)

You need to first create Users and then you can append that User. — zaph
– zaph, Commented Oct 7, 2015 at 19:33

Eric Aya · Accepted Answer · 2015-10-07 19:39:28Z

1

You need to create a valid initializer for your User class (and for the other classes too but we're focusing on User here as an example).

class User {
    var UserID: Int
    var Username: String
    var Location: String
    var Devices: [Device]
    init(userID: Int, username: String, location: String, devices: [Device]) {
        self.UserID = userID
        self.Username = username
        self.Location = location
        self.Devices = devices
    }
}

Now you can create a user:

let david = User(userID: 23, username: "David", location: "HQ", devices : [Device()])

And add it to your Users array:

Users.append(david)

Note: class names begin with uppercase letter but variables should begin with a lowercase letter. So your var UserID: Int should be var userID: Int for example, the Users array should be users, etc.

edited Oct 7, 2015 at 19:39

answered Oct 7, 2015 at 19:36

Eric Aya

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5 Comments

Eric Aya Over a year ago

It was working but it was always initializing an User object with the same hardcoded values. With my example you can make custom User objects.

zaph Over a year ago

Also method and function names should begin with a lower-case letter. The exception for variable names is that is a variable begins with a well know acronym it can be upper-case.

Roibu Adrian Over a year ago

Thank you! I'll also change the way I declare variables and classes.

Eric Aya Over a year ago

You're welcome. Just for info, there's a great resource here about good style practices for Swift: github.com/raywenderlich/swift-style-guide

Roibu Adrian Over a year ago

Great resource indeed! :) Thanks, again.

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