UIScrollView pan with 1 finger when zoomed in - swift

Question

I got a scrollView with some sub views added to it. Scrolling and zooming works fine.
What I would like to is when the scrollView is zoomed in, alter the behavior of the 1 finger touch to pan instead of scroll.
Right now if you are zoomed in and move around with 1 finger you can only scroll the zoomed in content. With two fingers you can pan around. This is the behaviour I would like to change.
I haven't found any solution to this issue and I don't really have any ideas except trying to alter the minimum and maximum touches required but it doesn't seem to work.
func scrollViewDidZoom(_ scrollView: UIScrollView) {
scrollView.panGestureRecognizer.maximumNumberOfTouches = 1
}
func scrollViewDidEndZooming(_ scrollView: UIScrollView, with view: UIView?, atScale scale: CGFloat) {
if scale == 1 {
scrollView.panGestureRecognizer.maximumNumberOfTouches = 2
}
}

Answer 1

I realized the issue I had was that each subview had their own scrollView (in my case my subviews wkWebViews). They were handling their own zoom even though I was trying to zoom from the UIScrollView.
I took these steps to solve this issue.
MyClass: UIViewController, UIScrollViewDelegate {
// This view should handle the zooming
#IBOutlet var scrollView: UIScrollView!
// .. and this view will contain all subviews to be zoomed
#IBOutlet var wrapper: UIView!
override func viewDidLoad() {
super.viewDidLoad()
self.scrollView.delegate = self
self.addSViewsToScrollView()
}
func addViewsToScrollView () {
// MARK: - Step 1
// .. set wkWebView scrollview maximum and minimum zoom scale to 1.
let myArray: [WkWebView]? = [WkWebView(),WkWebView(),WkWebView()]
for view in myArray {
wkWebView.scrollView.maximumZoomScale = 1
wkWebView.scrollView.minimumZoomScale = 1
wkWebView.isUserInteractionEnabled = false // This is key otherwise it wont work
wkWebView.scrollView.isUserInteractionEnabled = false // .. this aswell
}
// MARK: - Step 2
// .. add all views to a wrapper view
for view in myArray {
self.wrapperView.addSubview(view)
}
}
func viewForZooming(in scrollView: UIScrollView) -> UIView? {
return self.wrapper
}
}
By returning a single view the panning in the zoomed in state works fine. Also the wkWebView scrollViews do not interfere with the zooming anymore.