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react-native-swipe-gestures

React Native component for handling swipe gestures in up, down, left and right direction.

Installation

npm i -S react-native-swipe-gestures

Usage

"use strict";

import React, { Component } from "react";
import { View, Text } from "react-native";
import GestureRecognizer, {
  swipeDirections,
} from "react-native-swipe-gestures";

class SomeComponent extends Component {
  constructor(props) {
    super(props);
    this.state = {
      myText: "I'm ready to get swiped!",
      gestureName: "none",
      backgroundColor: "#fff",
    };
  }

  onSwipeUp(gestureState) {
    this.setState({ myText: "You swiped up!" });
  }

  onSwipeDown(gestureState) {
    this.setState({ myText: "You swiped down!" });
  }

  onSwipeLeft(gestureState) {
    this.setState({ myText: "You swiped left!" });
  }

  onSwipeRight(gestureState) {
    this.setState({ myText: "You swiped right!" });
  }

  onSwipe(gestureName, gestureState) {
    const { SWIPE_UP, SWIPE_DOWN, SWIPE_LEFT, SWIPE_RIGHT } = swipeDirections;
    this.setState({ gestureName: gestureName });
    switch (gestureName) {
      case SWIPE_UP:
        this.setState({ backgroundColor: "red" });
        break;
      case SWIPE_DOWN:
        this.setState({ backgroundColor: "green" });
        break;
      case SWIPE_LEFT:
        this.setState({ backgroundColor: "blue" });
        break;
      case SWIPE_RIGHT:
        this.setState({ backgroundColor: "yellow" });
        break;
    }
  }

  render() {
    const config = {
      velocityThreshold: 0.3,
      directionalOffsetThreshold: 80,
    };

    return (
      <GestureRecognizer
        onSwipe={(direction, state) => this.onSwipe(direction, state)}
        onSwipeUp={(state) => this.onSwipeUp(state)}
        onSwipeDown={(state) => this.onSwipeDown(state)}
        onSwipeLeft={(state) => this.onSwipeLeft(state)}
        onSwipeRight={(state) => this.onSwipeRight(state)}
        config={config}
        style={{
          flex: 1,
          backgroundColor: this.state.backgroundColor,
        }}
      >
        <Text>{this.state.myText}</Text>
        <Text>onSwipe callback received gesture: {this.state.gestureName}</Text>
      </GestureRecognizer>
    );
  }
}

export default SomeComponent;

Config

Can be passed within optional config property.

Params Type Default Description
velocityThreshold Number 0.3 Velocity that has to be breached in order for swipe to be triggered (vx and vy properties of gestureState)
directionalOffsetThreshold Number 80 Absolute offset that shouldn't be breached for swipe to be triggered (dy for horizontal swipe, dx for vertical swipe)
gestureIsClickThreshold Number 5 Absolute distance that should be breached for the gesture to not be considered a click (dx or dy properties of gestureState)
detectSwipeUp Boolean true enable/disable swipe up gesture detection
detectSwipeDown Boolean true enable/disable swipe down gesture detection
detectSwipeLeft Boolean true enable/disable swipe left gesture detection
detectSwipeRight Boolean true enable/disable swipe right gesture detection

Methods

onSwipe(gestureName, gestureState)

Params Type Description
gestureName String Name of the gesture (look example above)
gestureState Object gestureState received from PanResponder

onSwipeUp(gestureState)

Params Type Description
gestureState Object gestureState received from PanResponder

onSwipeDown(gestureState)

Params Type Description
gestureState Object gestureState received from PanResponder

onSwipeLeft(gestureState)

Params Type Description
gestureState Object gestureState received from PanResponder

onSwipeRight(gestureState)

Params Type Description
gestureState Object gestureState received from PanResponder