In what situations will a click event on an element not be handled through the View event handling mechanism?

A click event on an element in iOS may not be handled through the standard UIView event handling mechanism in the following situations:

• userInteractionEnabled = false — if the UIView has user interaction disabled, events will not be passed to this view.
• UIView is covered by another view with userInteractionEnabled = true — if another view is on top that intercepts events.
• Gestures (Gesture Recognizers) intercept the event — if a gesture recognizer is set on the UIView or its superview, which handles the event and does not pass it further.
• UIView is hidden (hidden = true) or alpha = 0 — such views do not receive events.
• frame or bounds of the element are zero or the element is outside the visible area — then the event will not reach this element.

For example, if a button is disabled (isUserInteractionEnabled = false), clicks on it will not be processed.