How to create a constants file?

  • Create a new Constants.swift file.

  • Create a Struct inside the Constants.swift file. You name the file Constants, K, or what you want. :)

  • Add static let properties to the Struct. Like below.

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struct K {
    static let cellIdentifier = "ReusableCell"
    static let cellNibName = "MessageCell"
    static let registerSegue = "RegisterToChat"
    static let loginSegue = "LoginToChat"
    // If you wish, you can add a group for similar content.
    struct BrandColors {
        static let purple = "BrandPurple"
        static let lightPurple = "BrandLightPurple"
        static let blue = "BrandBlue"
        static let lighBlue = "BrandLightBlue"
    }

    struct FStore {
        static let collectionName = "messages"
        static let senderField = "sender"
        static let bodyField = "body"
        static let dateField = "date"
    }
}

Usage

  • print(K.cellIdentifier)
  • print(K.BrandColors.purple)