[ダブルタップをUITapGestureRecognizerで設定する] #iOS

ViewController.swift

class ViewController: UIViewController {
  
  override func viewDidLoad() {
    super.viewDidLoad()
    
    let gesture = UITapGestureRecognizer()
    gesture.numberOfTapsRequired = 2 // ここで回数を設定する
    gesture.rx.event.asSignal()
    	.emit(onNext: { [weak self] _ in
           // do somthing...
        }).disposed(by: disposeBag)
  }
}