dump object properties in swift

NSObject+DumpClass

import Foundation

extension NSObject {

    //
    // Retrieves an array of property names found on the current object
    // using Objective-C runtime functions for introspection:
    // https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtPropertyIntrospection.html
    //
    func propertyNames() -> Array<String> {
        var results: Array<String> = [];

        // retrieve the properties via the class_copyPropertyList function
        var count: UInt32 = 0;
        var myClass: AnyClass = self.classForCoder;
        var properties = class_copyPropertyList(myClass, &count);

        // iterate each objc_property_t struct
        for var i: UInt32 = 0; i < count; i++ {
            var property = properties[Int(i)];

            // retrieve the property name by calling property_getName function
            var cname = property_getName(property);

            // covert the c string into a Swift string
            var name = String.fromCString(cname);
            results.append(name!);
        }

        // release objc_property_t structs
        free(properties);

        return results;
    }

}