ios – Operate Calling itself A number of Occasions with none Obvious Purpose

I’m engaged on an iOS app the place I’ve an AnyArtboardEvent technique that pushes snapshots into my undo/redo stack.

Right here’s a simplified model of it:

func AnyArtboardEvent(mergedImaged: UIImage = UIImage()) {
    self.undoRedo?.Add(worth: self.SlotViewsToCollection(mergedImage: mergedImaged))
    self.UpdateControllerForActiveSlot()
}

The Add technique in my UndoRedo class simply appends values to a group (no recursion there).

func Add(worth: SlotViewCollection) {
    var pointerTemp: Int = self.pointer
    pointerTemp = pointerTemp + 1
    self.pointer = pointerTemp
    self.CheckValueAtIndex(worth)
    self.EnsureCollectionSize()
}

Problem is that when person finishes interacting with a slider, I name AnyArtboardEvent contained in the .ended part of my contact occasion handler:

if let touchEvent = occasion.allTouches?.first {
    swap touchEvent.part {
    case .ended:
        self.isAnyThingChange = true
        self.AnyArtboardEvent()   // <-- known as right here
        self.CurrentActiveSlot?.TextLabel?.InitCaLayer(parentView: self)
    default:
        break
    }
}

However after debugging:

When the slider interplay ends, AnyArtboardEvent known as thrice.

The primary name is predicted, however the second and third calls occur instantly afterward (with out me explicitly calling them).

I added a symbolic breakpoint and confirmed that every one three calls originate from this .ended block.

I additionally checked the InitCaLayer technique (which provides a border CAShapeLayer), however it doesn’t name AnyArtboardEvent.

To this point, I couldn’t discover something in my code that may trigger AnyArtboardEvent to run a number of instances.

Is it attainable that touchesEnded / .ended part is firing a number of instances for the slider gesture?

Or may including layers (CAShapeLayer) not directly set off structure passes that fireplace the contact occasion handler once more?

How can I guarantee AnyArtboardEvent known as solely as soon as per slider interplay?