Feedback/highlighting And Cancel-ability Should Be There In Gesture Responder System
To make your users feel great using your app, every action should have the following attributes:
Feedback/highlighting – let the user know what is handling their touch, and what will happen when they release the gesture. Cancel-ability- when performing an action, let the user to abort it mid-touch by dragging their finger away. These features make users feel more comfortable using an app, because it lets people experiment and interact without the fear of making mistakes.