List properties of a swift class.

list_properties.swift

import Foundation

struct Point {
    var x = 0.0
    var y = 0.0
}

class PropertyHub {
    var simpleProp = "Foo"
    var structProp = Point()
    
    // computed property is not visible in reflect().
    var computedProp : Point {
        get {
            return Point(x: structProp.x + 100.0, y: structProp.y - 100.0)
        }
    }
}

// we have to create an instance before calling reflect().
var hub = PropertyHub()

let mirror = reflect(hub)
let count = mirror.count

// this for loop will print:
//
//     key: simpleProp
//     key: structProp
for var index = 0; index < count; ++index {
    let key = mirror[index].0
    
    // "super" refers to super class if any.
    if key == "super" && index == 0 {
        continue
    }
    
    print("key: ")
    println(key)
}