How to get all static properties in Swift?

Question

class AllDevice: Reflectable{

    static let LIGHT_ONOFF_NH_3A_R11_01_L12 = "LIGHT_ONOFF_NH_3A_R11_01_L12"

    static let PLUG_ONOFF_NH_3A_R11_01_B2AC = "PLUG_ONOFF_NH_3A_R11_01_B2AC"
    static let PLUG_POWER_NH_3A_R11_01_B2AC="PLUG_POWER_NH_3A_R11_01_B2AC"
    static let PLUG_ENERGY_NH_3A_R11_01_B2AC="PLUG_ENERGY_NH_3A_R11_01_B2AC"

    static let PLUG_ONOFF_NH_3A_R11_02_B2B8="PLUG_ONOFF_NH_3A_R11_02_B2B8"
    static let PLUG_POWER_NH_3A_R11_02_B2B8="PLUG_POWER_NH_3A_R11_02_B2B8"
    static let PLUG_ENERGY_NH_3A_R11_02_B2B8="PLUG_ENERGY_NH_3A_R11_02_B2B8"

    static let  PLUG_ONOFF_NH_3A_R11_03_B2D2="PLUG_ONOFF_NH_3A_R11_03_B2D2"
    static let PLUG_POWER_NH_3A_R11_03_B2D2="PLUG_POWER_NH_3A_R11_03_B2D2"
    static let PLUG_ENERGY_NH_3A_R11_03_B2D2="PLUG_ENERGY_NH_3A_R11_03_B2D2"

}

I have tried below article ,but doesn't work How to list all Variables of a class in swift

your question is unclear, what are you trying to achieve? You want to output every variable is that right? Edit your answer and show how a sample output should look like. — Tom el Safadi, May 15 '16 at 11:36

score 1 · Accepted Answer · answered May 15 '16 at 15:00

One way is to implement CustomReflectable:

class AllDevice: CustomReflectable {

    static let LIGHT_ONOFF_NH_3A_R11_01_L12 = "LIGHT_ONOFF_NH_3A_R11_01_L12"

    static let PLUG_ONOFF_NH_3A_R11_01_B2AC = "PLUG_ONOFF_NH_3A_R11_01_B2AC"
    static let PLUG_POWER_NH_3A_R11_01_B2AC="PLUG_POWER_NH_3A_R11_01_B2AC"
    static let PLUG_ENERGY_NH_3A_R11_01_B2AC="PLUG_ENERGY_NH_3A_R11_01_B2AC"

    static let PLUG_ONOFF_NH_3A_R11_02_B2B8="PLUG_ONOFF_NH_3A_R11_02_B2B8"
    static let PLUG_POWER_NH_3A_R11_02_B2B8="PLUG_POWER_NH_3A_R11_02_B2B8"
    static let PLUG_ENERGY_NH_3A_R11_02_B2B8="PLUG_ENERGY_NH_3A_R11_02_B2B8"

    static let PLUG_ONOFF_NH_3A_R11_03_B2D2="PLUG_ONOFF_NH_3A_R11_03_B2D2"
    static let PLUG_POWER_NH_3A_R11_03_B2D2="PLUG_POWER_NH_3A_R11_03_B2D2"
    static let PLUG_ENERGY_NH_3A_R11_03_B2D2="PLUG_ENERGY_NH_3A_R11_03_B2D2"

    func customMirror() -> Mirror {
        return Mirror(self, children: [
            "LIGHT_ONOFF_NH_3A_R11_01_L12": self.dynamicType.LIGHT_ONOFF_NH_3A_R11_01_L12,
            "PLUG_ONOFF_NH_3A_R11_01_B2AC": self.dynamicType.PLUG_ONOFF_NH_3A_R11_01_B2AC,
            "PLUG_POWER_NH_3A_R11_01_B2AC": self.dynamicType.PLUG_POWER_NH_3A_R11_01_B2AC
            // etc...
        ])
    }
}

let device = AllDevice()
let m = Mirror(reflecting: device)
// you can access m.children now

As you can see, it's not fun and involve a lot of string literal. If you change value assigned to each device type, you have to update the mirror accordingly.

It is to implement your device type constants as an enum:

enum Device: String {
    case LIGHT_ONOFF_NH_3A_R11_01_L12 = "LIGHT_ONOFF_NH_3A_R11_01_L12"
    case PLUG_ONOFF_NH_3A_R11_01_B2AC = "PLUG_ONOFF_NH_3A_R11_01_B2AC"
    case PLUG_POWER_NH_3A_R11_01_B2AC = "PLUG_POWER_NH_3A_R11_01_B2AC"
    // etc..

    static let allDevices: [Device] = [
        .LIGHT_ONOFF_NH_3A_R11_01_L12,
        .PLUG_ONOFF_NH_3A_R11_01_B2AC,
        .PLUG_POWER_NH_3A_R11_01_B2AC
        // etc...
    ]
}

This way the complier can offer you some error checking.

How to get all static properties in Swift?

1 Answers1