ClosureSleeve.swift

import Foundation

internal class ClosureSleeve {

    let closure: () -> Void

    init(for object: AnyObject, _ closure: @escaping () -> Void) {
        self.closure = closure
        objc_setAssociatedObject(
            object,
            String(format: "[%d]", arc4random()),
            self,
            objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN)
    }

    @objc
    func invoke () {
        closure()
    }
}

UIBarButtonItem+Closure.swift

import UIKit

extension UIBarButtonItem {

    public convenience init(title: String?, style: UIBarButtonItem.Style, target: AnyObject, _ closure: @escaping () -> Void) {
        let sleeve = ClosureSleeve(for: target, closure)
        self.init(title: title, style: style, target: sleeve, action: #selector(ClosureSleeve.invoke))
    }
}

UIControl+Closure.swift

import UIKit

extension UIControl {

    func add(for controlEvents: UIControl.Event, _ closure: @escaping () -> Void) {
        let sleeve = ClosureSleeve(for: self, closure)
        addTarget(sleeve, action: #selector(ClosureSleeve.invoke), for: controlEvents)
    }
}