タップジェスチャをコールバックで（swift3） ref: http://qiita.com/MTattin/items/36d66f1f08235c382cf3

file0.swift

import UIKit
///
/// ベースビュー
///
class V: UIView, UIGestureRecognizerDelegate {


    // MARK: ------------------------------ UIGestureRecognizer
    ///
    /// コールバック関数
    ///
    private var _singleTapAction: ((_ g: UITapGestureRecognizer) -> Void)?
    ///
    /// シングルタップ設定
    ///
    func singleTap(_ action: ((_ g: UITapGestureRecognizer) -> Void)?) {
        let singleTapGesture: UITapGestureRecognizer = UITapGestureRecognizer(
            target: self,
            action: #selector(V._singleTapSelector(_:))
        )
        singleTapGesture.delegate = self
        singleTapGesture.numberOfTapsRequired = 1
        singleTapGesture.numberOfTouchesRequired = 1
        self.addGestureRecognizer(singleTapGesture)
        self._singleTapAction = action
    }
    ///
    /// selector用
    ///
    @objc private func _singleTapSelector(_ g: UITapGestureRecognizer) {
        self._singleTapAction?(g)
    }

}

file1.swift

let view: V = V.init()
view.singleTap { (g) in
    if UIGestureRecognizerState.ended == g.state {
        ///
        /// 何か処理
        ///
    }
}