Я пытаюсь реализовать анимацию, которая должна выполняться на устройствах iOS и Android.
В iOS производительность кажется удовлетворительной (протестировано с iPhone 6 Plus и выше).
С другой стороны, для некоторых устройств Android анимация отстает.
Вопрос в том, какие действия можно предпринять, чтобы избежать проблемы с производительностью (кроме использования директивы useNativeDriver={true}
, которая уже используетсякод)?
Код такой:
import * as React from 'react';
import {
Animated,
ImageBackground,
StyleSheet,
Image,
Easing,
TextInput,
View,
Text,
} from 'react-native';
import { PanGestureHandler, State } from 'react-native-gesture-handler';
import backImg from './background.png';
const c_initial_coordinate_left = 100;
const c_initial_coordinate_top = 100;
export default class App extends React.Component {
constructor(props) {
super(props);
this.state = {};
this.spaceAnimatedTranslations = new Animated.ValueXY();
this.spaceAnimatedTranslations2 = new Animated.ValueXY();
this.spaceAnimatedTranslations3 = new Animated.ValueXY();
this.spaceAnimatedTranslations4 = new Animated.ValueXY();
this.spaceAnimatedTranslations5 = new Animated.ValueXY();
this.spaceAnimatedTranslations.addListener(value => (this.spaceAnimatedTranslations_value = value));
this.spaceAnimatedTranslations2.addListener(value => (this.spaceAnimatedTranslations_value2 = value));
this.spaceAnimatedTranslations3.addListener(value => (this.spaceAnimatedTranslations_value3 = value));
this.spaceAnimatedTranslations4.addListener(value => (this.spaceAnimatedTranslations_value4 = value));
this.spaceAnimatedTranslations5.addListener(value => (this.spaceAnimatedTranslations_value5 = value));
this._animatedStyle = {transform: [{ translateX: this.spaceAnimatedTranslations.x }, { translateY: this.spaceAnimatedTranslations.y },],};
this._animatedStyle2 = {transform: [{ translateX: this.spaceAnimatedTranslations2.x }, { translateY: this.spaceAnimatedTranslations2.y },],};
this._animatedStyle3 = {transform: [{ translateX: this.spaceAnimatedTranslations3.x }, { translateY: this.spaceAnimatedTranslations3.y },],};
this._animatedStyle4 = {transform: [{ translateX: this.spaceAnimatedTranslations4.x }, { translateY: this.spaceAnimatedTranslations4.y },],};
this._animatedStyle5 = {transform: [{ translateX: this.spaceAnimatedTranslations5.x }, { translateY: this.spaceAnimatedTranslations5.y },],};
}
onSpaceMove(event) {
let l_panTranslateX = event.nativeEvent.translationX;
let l_panTranslateY = event.nativeEvent.translationY;
let l_panStartX = event.nativeEvent.x - event.nativeEvent.translationX;
let l_panStartY = event.nativeEvent.y - event.nativeEvent.translationY;
let l_animationsArray = new Array();
l_animationsArray.push(Animated.timing(this.spaceAnimatedTranslations.y, {toValue: event.nativeEvent.translationY,duration: 0,easing: Easing.linear,}));
l_animationsArray.push(Animated.timing(this.spaceAnimatedTranslations2.y, {toValue: event.nativeEvent.translationY,duration: 0,easing: Easing.linear,}));
l_animationsArray.push(Animated.timing(this.spaceAnimatedTranslations3.y, {toValue: event.nativeEvent.translationY,duration: 0,easing: Easing.linear,}));
l_animationsArray.push(Animated.timing(this.spaceAnimatedTranslations4.y, {toValue: event.nativeEvent.translationY,duration: 0,easing: Easing.linear,}));
l_animationsArray.push(Animated.timing(this.spaceAnimatedTranslations5.y, {toValue: event.nativeEvent.translationY,duration: 0,easing: Easing.linear,}));
l_animationsArray.push(Animated.timing(this.spaceAnimatedTranslations.x, {toValue: event.nativeEvent.translationX,duration: 0,easing: Easing.linear,}));
l_animationsArray.push(Animated.timing(this.spaceAnimatedTranslations2.x, {toValue: event.nativeEvent.translationX,duration: 0,easing: Easing.linear,}));
l_animationsArray.push(Animated.timing(this.spaceAnimatedTranslations3.x, {toValue: event.nativeEvent.translationX,duration: 0,easing: Easing.linear,}));
l_animationsArray.push(Animated.timing(this.spaceAnimatedTranslations4.x, {toValue: event.nativeEvent.translationX,duration: 0,easing: Easing.linear,}));
l_animationsArray.push(Animated.timing(this.spaceAnimatedTranslations5.x, {toValue: event.nativeEvent.translationX,duration: 0,easing: Easing.linear,}));
Animated.parallel(l_animationsArray).start();
this.debug_message = `\n
event.nativeEvent.translationX: ${Math.floor(
event.nativeEvent.translationX
)}
event.nativeEvent.translationY: ${Math.floor(
event.nativeEvent.translationY
)}
event.nativeEvent.absoluteX: ${Math.floor(event.nativeEvent.absoluteX)}
event.nativeEvent.absoluteY: ${Math.floor(event.nativeEvent.absoluteY)}
event.nativeEvent.x: ${Math.floor(event.nativeEvent.x)}
event.nativeEvent.y: ${Math.floor(event.nativeEvent.y)}
this.spaceAnimatedTranslations_value.x: ${Math.floor(
this.spaceAnimatedTranslations_value.x
)}
this.spaceAnimatedTranslations_value.y: ${Math.floor(
this.spaceAnimatedTranslations_value.y
)}
this.gestureStartedX: ${Math.floor(this.gestureStartedX)}
this.gestureStartedY: ${Math.floor(this.gestureStartedY)}
`;
this.forceUpdate();
}
onSpaceMoveCompleted(event) {
if (event.nativeEvent.state === State.BEGAN) {
this.spaceAnimatedTranslations.flattenOffset();
this.spaceAnimatedTranslations2.flattenOffset();
this.spaceAnimatedTranslations3.flattenOffset();
this.spaceAnimatedTranslations4.flattenOffset();
this.spaceAnimatedTranslations5.flattenOffset();
this.spaceAnimatedTranslations.setOffset({x: Math.floor(event.nativeEvent.absoluteX - c_initial_coordinate_left),y: Math.floor(event.nativeEvent.absoluteY - c_initial_coordinate_top),});
this.spaceAnimatedTranslations2.setOffset({x: Math.floor(event.nativeEvent.absoluteX - c_initial_coordinate_left),y: Math.floor(event.nativeEvent.absoluteY - c_initial_coordinate_top),});
this.spaceAnimatedTranslations3.setOffset({x: Math.floor(event.nativeEvent.absoluteX - c_initial_coordinate_left),y: Math.floor(event.nativeEvent.absoluteY - c_initial_coordinate_top),});
this.spaceAnimatedTranslations4.setOffset({x: Math.floor(event.nativeEvent.absoluteX - c_initial_coordinate_left),y: Math.floor(event.nativeEvent.absoluteY - c_initial_coordinate_top),});
this.spaceAnimatedTranslations5.setOffset({x: Math.floor(event.nativeEvent.absoluteX - c_initial_coordinate_left),y: Math.floor(event.nativeEvent.absoluteY - c_initial_coordinate_top ),});
this.gestureStartedX = event.nativeEvent.absoluteX;
this.gestureStartedY = event.nativeEvent.absoluteY;
}
if (event.nativeEvent.state === State.END) {
this.onSpaceMove(event);
}
}
render() {
return (
<ImageBackground source={backImg} style={{ flex: 1 }}>
{this.debug_message ? (
<Text style={{ color: 'white' }}>{this.debug_message}</Text>
) : (
undefined
)}
<PanGestureHandler
key={`test`}
onGestureEvent={e => this.onSpaceMove(e)}
onHandlerStateChange={e => this.onSpaceMoveCompleted(e)}>
<Animated.View
ref={ref => {
this.testAnimatedView = ref;
}}
style={[styles._animatable_view, this._animatedStyle]}
useNativeDriver={true}>
<View style={styles._box_content}>
<Text
style={{
width: '100%',
height: '100%',
fontSize: 15,
textAlign: 'center',
textAlignVertical: 'center',
borderRadius: 20,
}}
editable={false}
ref={ref => {
this.textInputRef = ref;
}}
>
{'Master (1) (DRAG THIS ONE)'}
</Text>
</View>
</Animated.View>
</PanGestureHandler>
<Animated.View
ref={ref => {
this.testAnimatedView2 = ref;
}}
style={[styles._animatable_view2, this._animatedStyle2]}
useNativeDriver={true}>
<View style={styles._box_content}>
<Text
style={{
width: '100%',
height: '100%',
fontSize: 15,
textAlign: 'center',
textAlignVertical: 'center',
borderRadius: 20,
}}
editable={false}
ref={ref => {
this.textInputRef = ref;
}}
>
{'Slave (2) '}
</Text>
</View>
</Animated.View>
<Animated.View
ref={ref => {
this.testAnimatedView3 = ref;
}}
style={[styles._animatable_view3, this._animatedStyle3]}
useNativeDriver={true}>
<View style={styles._box_content}>
<Text
style={{
width: '100%',
height: '100%',
fontSize: 15,
textAlign: 'center',
textAlignVertical: 'center',
borderRadius: 20,
}}
editable={false}
ref={ref => {
this.textInputRef = ref;
}}
>
{'Slave (3) '}
</Text>
</View>
</Animated.View>
<Animated.View
ref={ref => {
this.testAnimatedView4 = ref;
}}
style={[styles._animatable_view4, this._animatedStyle4]}
useNativeDriver={true}>
<View style={styles._box_content}>
<Text
style={{
width: '100%',
height: '100%',
fontSize: 15,
textAlign: 'center',
textAlignVertical: 'center',
borderRadius: 20,
}}
editable={false}
ref={ref => {
this.textInputRef = ref;
}}
>
{'Slave (4) '}
</Text>
</View>
</Animated.View>
<Animated.View
ref={ref => {
this.testAnimatedView5 = ref;
}}
style={[styles._animatable_view5, this._animatedStyle5]}
useNativeDriver={true}>
<View style={styles._box_content}>
<Text
style={{
width: '100%',
height: '100%',
fontSize: 15,
textAlign: 'center',
textAlignVertical: 'center',
borderRadius: 20,
}}
editable={false}
ref={ref => {
this.textInputRef = ref;
}}
>
{'Slave (5) '}
</Text>
</View>
</Animated.View>
</ImageBackground>
);
}
}
const styles = StyleSheet.create({
_animatable_view: {
flex: 1,
width: 250,
height: 50,
top: c_initial_coordinate_top,
left: c_initial_coordinate_left,
position: 'absolute',
backgroundColor: '#ABC',
alignItems: 'center',
justifyContent: 'center',
borderColor: 'gainsboro',
borderWidth: 2,
},
_animatable_view2: {
flex: 1,
width: 250,
height: 50,
top: c_initial_coordinate_top + 100,
left: c_initial_coordinate_left,
position: 'absolute',
backgroundColor: '#ABC',
alignItems: 'center',
justifyContent: 'center',
borderColor: 'gainsboro',
borderWidth: 2,
},
_animatable_view3: {
flex: 1,
width: 250,
height: 50,
top: c_initial_coordinate_top + 200,
left: c_initial_coordinate_left,
position: 'absolute',
backgroundColor: '#ABC',
alignItems: 'center',
justifyContent: 'center',
borderColor: 'gainsboro',
borderWidth: 2,
},
_animatable_view4: {
flex: 1,
width: 250,
height: 50,
top: c_initial_coordinate_top + 300,
left: c_initial_coordinate_left,
position: 'absolute',
backgroundColor: '#ABC',
alignItems: 'center',
justifyContent: 'center',
borderColor: 'gainsboro',
borderWidth: 2,
},
_animatable_view5: {
flex: 1,
width: 250,
height: 50,
top: c_initial_coordinate_top + 400,
left: c_initial_coordinate_left,
position: 'absolute',
backgroundColor: '#ABC',
alignItems: 'center',
justifyContent: 'center',
borderColor: 'gainsboro',
borderWidth: 2,
},
_box_content: {
flex: 1,
height: '100%',
width: '100%',
borderRadius: Math.min(this.rectangleHeight, this.rectangleWidth) / 2,
alignItems: 'center',
justifyContent: 'center',
borderColor: 'gainsboro',
borderWidth: 2,
opacity: 0.9,
},
});
Это можно увидеть в действии в этой закуске: https://snack.expo.io/@mehmetkaplan/movetextwithgesturesingle
Дополнительно, чтобы чувствоватьИз-за проблемы с производительностью я создал еще одну закуску, которая просто оживляет 5 объектов одновременно. Если вы запускаете это на устройствах с низким уровнем Android, вы можете почувствовать проблему с производительностью: https://snack.expo.io/@mehmetkaplan/movetextwithgesturemulti