fl034

@objc func handleDoubleTap(_ recognizer: UITapGestureRecognizer) {
    let scale = min(scrollView.zoomScale * 2, scrollView.maximumZoomScale)

    if scrollView.zoomScale == scrollView.minimumZoomScale { // zoom in
                let point = recognizer.location(in: imageView)
                
                let scrollSize = scrollView.frame.size
                let zoomScale = scrollView.maximumZoomScale * 0.7
                let size = CGSize(width: scrollSize.width / zoomScale,
                                  height: scrollSize.height / zoomScale)

gunantosteven

@objc func handleDoubleTap(_ recognizer: UITapGestureRecognizer) {
    let scale = min(scrollView.zoomScale * 2, scrollView.maximumZoomScale)

    if scale != scrollView.zoomScale { // zoom in
        let point = recognizer.location(in: imageView)

        let scrollSize = scrollView.frame.size
        let size = CGSize(width: scrollSize.width / scrollView.maximumZoomScale,
                          height: scrollSize.height / scrollView.maximumZoomScale)
        let origin = CGPoint(x: point.x - size.width / 2,