Swift Mirror reflection not returning properties on UIVIew

Trying to get all properties of UIView or UIViewController with the follownig:

func propertysNames()->[String]{
    var s = [String]()
    for c in Mirror(reflecting: self).children
    {
        if let name = c.label{
            s.append(name)
        }
    }
    return s
}

This works on UIVIewController, but UIView does not seem to return properties, any advice?