How did you implement the functionality?

The order of event processing when using Gesture Recognizer on a UIView in iOS is determined by several factors:

1. Gesture recognition priority: If multiple Gesture Recognizers are added to a UIView, they are processed in the order of addition, but their interaction can be managed through delegate methods, such as gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:.

2. Interaction with the event system: Gesture Recognizer intercepts touch events before they reach the UIView's touch handling methods (touchesBegan, touchesMoved, etc.).

3. Dependencies between Gesture Recognizers: You can set one Gesture Recognizer to wait for another to fail using require(toFail:).

Thus, the order of event processing depends on the configuration of Gesture Recognizers, their delegates, and dependencies.

Example of setting a dependency:

let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap))
let swipeGesture = UISwipeGestureRecognizer(target: self, action: #selector(handleSwipe))
swipeGesture.require(toFail: tapGesture) // swipe will wait for tap to fail
view.addGestureRecognizer(tapGesture)
view.addGestureRecognizer(swipeGesture)

This approach allows effective management of parallel tasks and executing code after all requests are completed.