UIResponder that finds the current first responder of an iOS application.

UIResponder+FirstResponder.swift

//
//  UIResponder+FirstResponder.swift
//  Thor
//
//  Created by Max Campolo on 8/20/17.
//  Copyright © 2017 Max Campolo. All rights reserved.
//

import Foundation
import UIKit

extension UIResponder {
    private weak static var currentResponder: UIResponder?

    public class var currentFirstResponder: UIResponder? {
        UIResponder.currentResponder = nil
        UIApplication.shared.sendAction(#selector(findFirstResponder(sender:)), to: nil, from: nil, for: nil)
        return UIResponder.currentResponder
    }

    internal func findFirstResponder(sender: AnyObject) {
        UIResponder.currentResponder = self
    }
}