[iOS - swift] RxGesture (+ tapGesture 바인딩 시 emit 현상 해결 방법)

RxGesture란

• 기존 Gesture 객체를 Rx로 감쌓아놓은 것
• 종속성

pod 'RxGesture'

RxGesture 사용 방법

• RxGesture가 없는 경우, 일반 UIView 바인딩

let sampleView = UIView()
let tapGesture = UITapGestureRecognizer()
sampleView.addGestureRecognizer(tapGesture)
tapGesture.addTarget(self, action: #selector(didTapView))

• RxGesture 사용

let sampleView = UIView()
sampleView.rx.tapGesture()
    .asDriver{ _ in .never() }
    .drive()
    .disposed(by: bag)

• 주의: tapGesture()를 그냥 사용 시, sampleView를 바인딩 할때도 event가 emit되므로 .when(.recognized) 연산자 추가

let sampleView = UIView()
sampleView.rx.tapGesture()
    .when(.reconized) // <- 추가
    .asDriver{ _ in .never() }
    .drive()
    .disposed(by: bag)

RxGesture 응용

• multiple

let sampleView = UIView()
sampleView.rx
    .anyGesture(.tap(), .swipe(direction: .up))
    .when(.recognized)
    .subscribe(onNext: { gesture in

    })
    .disposed(by: bag)

• 기타

 

* 참고 : github.com/RxSwiftCommunity/RxGesture