I want when there are two touches on the screen panResponder to keep going and don't stop but after about half a second panResponder stops and begin to scroll this is my code
import {View} from 'native-base';
import React, {Children, useMemo, useState} from 'react';
import {Animated, NativeTouchEvent, PanResponder} from 'react-native';
import {getDistance} from '../utils/functions';
interface Props {
opacity: Animated.Value;
}
const PinchZoom: React.FC<Props> = (props) => {
let initialXs: Array<number> = [];
let initialYs: Array<number> = [];
let currentXs: Array<number> = [];
let currentYs: Array<number> = [];
const resetAnimation = () => {
Animated.spring(props.opacity, {
toValue: props.opacity,
useNativeDriver: false,
}).start();
};
const panResponder = useMemo(
() =>
PanResponder.create({
onStartShouldSetPanResponder: (event) => {
let touches = event.nativeEvent.touches;
if (touches.length == 2) {
return true;
} else {
return false;
}
},
onPanResponderStart: (initial_event, initial_gesture) => {
let touches = initial_event.nativeEvent.touches;
if (touches.length == 2) {
initialXs = [];
initialYs = [];
initialXs.push(touches[0].locationX);
initialXs.push(touches[1].locationX);
initialYs.push(touches[0].locationY);
initialYs.push(touches[1].locationY);
}
},
onMoveShouldSetPanResponder: () => true,
onPanResponderMove: (event, gesture) => {
let touches = event.nativeEvent.touches;
if (touches.length == 2) {
currentXs = [];
currentYs = [];
currentXs.push(touches[0].locationX);
currentXs.push(touches[1].locationX);
currentYs.push(touches[0].locationY);
currentYs.push(touches[1].locationY);
}
console.log('Xs', initialXs, currentXs);
console.log('Ys', initialYs, currentYs);
},
onPanResponderRelease: (event, gesture) => {
let touches = event.nativeEvent.touches;
console.log('Xs', initialXs, currentXs);
console.log('Ys', initialYs, currentYs);
if (touches.length == 2) {
console.log('Xs', initialXs, currentXs);
console.log('Ys', initialYs, currentYs);
}
},
}),
[],
);
return (
<Animated.View {...panResponder.panHandlers}>
{props.children}
</Animated.View>
);
};
export default PinchZoom;
I want when the screen has two touches on it the panResponder starts and until there are two touches it continues and when there is one touch it stops
I temporarily fixed this issue with the below code
import {Text} from 'native-base';
import React, {useState} from 'react';
import {Animated, Dimensions, PanResponder} from 'react-native';
import {getDistance} from '../utils/functions';
const WINDOW_WIDTH = Dimensions.get('screen').width;
const WINDOW_HEIGHT = Dimensions.get('screen').height;
interface Props {
distance: Animated.Value;
}
const PinchZoom: React.FC<Props> = (props) => {
let initialXs: Array<number> = [];
let initialYs: Array<number> = [];
let currentXs: Array<number> = [];
let currentYs: Array<number> = [];
let distance = props.distance;
let zIndex: number = 0;
let initial_distance: number = 0;
let current_distance: number = 0;
const panResponder = useState(() =>
PanResponder.create({
onStartShouldSetPanResponder: (event, gesture) => {
let touches = event.nativeEvent.touches;
if (gesture.numberActiveTouches == 2) {
zIndex = 2;
return true;
} else {
zIndex = 0;
return false;
}
},
onPanResponderStart: (initial_event, initial_gesture) => {
let touches = initial_event.nativeEvent.touches;
initialXs = [];
initialYs = [];
initialXs.push(touches[0].locationX);
initialXs.push(touches[1].locationX);
initialYs.push(touches[0].locationY);
initialYs.push(touches[1].locationY);
},
onPanResponderGrant: () => {
initialXs = initialXs;
initialYs = initialYs;
currentXs = currentXs;
currentYs = currentYs;
},
onPanResponderMove: (event, gesture) => {
let touches = event.nativeEvent.touches;
if (touches.length == 2) {
currentXs = [];
currentYs = [];
currentXs.push(touches[0].locationX);
currentXs.push(touches[1].locationX);
currentYs.push(touches[0].locationY);
currentYs.push(touches[1].locationY);
initial_distance = getDistance(
initialXs[0],
initialYs[0],
initialXs[1],
initialYs[1],
);
current_distance = getDistance(
currentXs[0],
currentYs[0],
currentXs[1],
currentYs[1],
);
}
props.distance.setValue(initial_distance - current_distance);
},
onPanResponderRelease: () => {
zIndex = 0;
},
}),
)[0];
return (
<Animated.View
style={{
width: WINDOW_WIDTH,
height: WINDOW_HEIGHT,
zIndex: zIndex,
}}
{...panResponder.panHandlers}>
{props.children}
</Animated.View>
);
};
export default PinchZoom;
but if anybody has a better answer I appreciate for sharing it with me