Disable the flickering/blinking of UIMenuItems in UIMenuController in Swift

Question

How can I get rid of the flickering/blinking of UIMenuItems in a UIMenuController? I currently have copy and paste items, but when my app displays the menu inside the action of a UILongPressGestureRecognizer, they start blinking.

@objc func viewLongPressed(_ recognizer: UILongPressGestureRecognizer) {
    [...]

    UIMenuController.shared.setMenuVisible(true, animated: true)
}

Are there any implementations for this in iOS?

Answer 1

This is because UILongPressGestureRecognizer events get recognized constantly if you keep pressing the recognizer view. Calling the setMenuVisible(animated:) method of UIMenuController repeatedly causes the blinking effect you've described.

To solve this, show the menu only if the state of the recognizer is .began.

@objc func viewLongPressed(_ recognizer: UILongPressGestureRecognizer) {
    [...]

    if recognizer.state == .began {
        UIMenuController.shared.setMenuVisible(true, animated: true)
    }
}