How to create extension UITapGestureRecognizerDelegate or fix overlapping view SWIFT

Question

I create this basic tap gesture function for dismissing view and I added a delegate to override tap when the user taps on another custom sheet (container).

@objc func handleTapGesture() {
    dismiss(animated: true, completion: nil)
}

private func tapGestureToDissmis() {
    let tap = UITapGestureRecognizer()
    tap.addTarget(self, action: #selector(handleTapGesture))
    tap.delegate = self
    view.addGestureRecognizer(tap)
} 

extension TextConfigurationVC : UIGestureRecognizerDelegate {
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
    
    if touch.view?.isDescendant(of: container) == true {
        return false
    }
    return true
}

My problem is that I want to implement this for 8 screens and I don't want to repeat my self. i create in my UIViewcontroler extension file this tap function and I don't now how to pass this view :

extension UIViewController : UIGestureRecognizerDelegate {
public func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
    if touch.view?.isDescendant(of: **<UIView>)** == true {
        return false
    }
    return true
}

when I created the global container, each time it was called, it was overlapping each other (tap x 6)

Is it self.view or simply view (= view controller view you want to dismiss ? In other case you could create a custom II view controller with a default viewDidLoad to initialise the dismiss tap gesture — Ptit Xav
– Ptit Xav, Commented Feb 5, 2022 at 7:33
Another way is to add a (computed) var in your extension to store the view. — Ptit Xav
– Ptit Xav, Commented Feb 5, 2022 at 7:35

Dinesh · Accepted Answer · 2022-02-15 12:45:27Z

0

Simple way to handle individual tap action for views

   extension UIView {
private struct OnClickHolder {
    static var _closure:()->() = {}
}

private var onClickClosure: () -> () {
    get { return OnClickHolder._closure }
    set { OnClickHolder._closure = newValue }
}

func onTap(closure: @escaping ()->()) {
    self.onClickClosure = closure
    
    isUserInteractionEnabled = true
    let tap = UITapGestureRecognizer(target: self, action: #selector(onClickAction))
    addGestureRecognizer(tap)
}

@objc private func onClickAction() {
    onClickClosure()
}
}

Usage:

override func viewDidLoad() {
super.viewDidLoad()
let view = UIView(frame: .init(x: 0, y: 0, width: 80, height: 50))
view.backgroundColor  = .red
view.onTap {
    print("View Tapped")
}

}

answered Feb 15, 2022 at 12:45

Dinesh

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