detect which uiview is touched - ios

Question

I have custom view that should be clicked and do some action.
I have two CustomView in same screen. I want to detect which one is clicked to do different action.
Is it possible to set some ids there to detect which one is clicked exactly?
Here is my CustomView
protocol CostomViewDelegate: class {
func viewClicked()
}
class CostomView: UIView, UIGestureRecognizer {
#IBOutlet weak var placeholderlbl: UILabel!
#IBOutlet weak var textLbl: UILabel!
weak var delegate: CostomViewDelegate?
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.layer.backgroundColor = UIColor.red.cgColor
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
self.layer.backgroundColor = UIColor.white.cgColor
delegate?.viewClicked()
}
}

Answer 1

If you want to use delegation, then you should change your delegate function so that the view provides a reference to itself to the delegate.
protocol CostomViewDelegate: class {
func costomView(clicked: CostomView)
}
class CostomView: UIView, UIGestureRecognizer {
#IBOutlet weak var placeholderlbl: UILabel!
#IBOutlet weak var textLbl: UILabel!
weak var delegate: CostomViewDelegate?
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.layer.backgroundColor = UIColor.red.cgColor
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
self.layer.backgroundColor = UIColor.white.cgColor
delegate?.costomView(clicked: self)
}
}
Then in your delegate function you can compare the value of the passed reference or other properties in order to take the appropriate action:
func costomView(clicked: CostomView) {
if clicked == self.costomView1 {
// Do something
} else if clicked == self.costomView2 {
// Do something else
}
}
You could also add a property to your CostomView class that holds a closure and invoke that closure when the view is tapped. This is, perhaps, a more "modern" approach, but delegation is still valid and how you do it is a matter of opinion. Personally, one advantage I see for delegation is when viewingthe code you can quickly locate the delegate function in a class, while a closure may be less obvious.

Answer 2

The best way to do it - define touch behaviour for your CostomView, from parent class or view controller for example with closures. The fastest (but pretty ugly) way - set different tags for these views and code different behaviour for different tags.