Gesture Handlers

    With the library react-native-gesture-hander, we can use the native gesture recognition APIs.

    We can use these React components to detect gestures:

    • PanGestureHandler
    • TapGestureHandler
    • LongPressGestureHandler
    • RotationGestureHandler
    • FlingGestureHandler
    • PinchGestureHandler
    • ForceTouchGestureHandler

    States

    A gesture is always in one of the following states:

    • UNDETERMINED
    • BEGAN
    • ACTIVE
    • END
    • CANCELLED
    • FAILED

    The onHandlerStateChange prop is called when the state changes.

    Events

    Any change in the gesture (e.g. the user moving their finger) will trigger an event - we can listen for events with the onGestureEvent prop.

    PanGestureHandler event metadata includes:

    • x
    • y
    • translationX
    • translationY
    • velocityX
    • velocityY

    These can become Animated.Values.

    Example

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