问如何在Swift上打印类名？

EN

import UIKit

class PrintClassName: NSObject {
    override init() {
        super.init()
        println("\(self.dynamicType)")
        // Prints "(Metatype)"

        println("\(object_getClassName(self))");
        // Prints "0x7b680910 (Pointer)"

        println("\(self.className)")
        // Compile error!

        println(PrintClassName.self)
        // Prints "(Metatype)"
    }
}