gestureRecognizer:gestureRecognizer shouldReceiveTouch: is not called - Stack Overflow

Question

• (BOOL)gestureRecognizer:(UIGestureRecognizer )gestureRecognizer shouldReceiveTouch:(UITouch )touch

Add a view to the scrollview and add a drag gesture to it. This causes scrollview dragging and view pan dragging gestures to conflict.
To resolve conflicts, use this function. But why wasn't it called?

Answer 1

This method is the delegate method of UIGestureRecognizer. Have you set the delegate for your customized gesture?

Answer 2

Just use the addTarget method, there is no need to use Delegate
If you use Delegate, you need to set
GestureRecognizer.delegate = xxx