当按下按钮时,我试图让屏幕像硬币一样翻转。到目前为止,我所做的是我已经成功地翻转了两个小屏幕,但是屏幕有点大,代码不起作用。就像在我的代码中,两个简单的按钮工作正常,但是当我从其他大屏幕调用视图时,视图不会显示。我认为这是因为将被翻转的视图变得不可见但仍保留在其位置上,并且其他视图无法放置在该空间上,因此当涉及到更大的屏幕时,整个事情都不会显示出来。我是 RN 的新手。帮助。
import React, { Component } from 'react';
import {
AppRegistry,
StyleSheet,
Text,
View,
TouchableOpacity,
Animated
} from 'react-native';
var screenWidth = require('Dimensions').get('window').width;
export default class animatedbasic extends Component {
componentWillMount() {
this.animatedValue = new Animated.Value(0);
this.value = 0;
this.animatedValue.addListener(({ value }) => {
this.value = value;
})
this.frontInterpolate = this.animatedValue.interpolate({
inputRange: [0, 180],
outputRange: ['0deg', '180deg'],
})
this.backInterpolate = this.animatedValue.interpolate({
inputRange: [0, 180],
outputRange: ['180deg', '360deg']
})
this.frontOpacity = this.animatedValue.interpolate({
inputRange: [89, 90],
outputRange: [1, 0]
})
this.backOpacity = this.animatedValue.interpolate({
inputRange: [89, 90],
outputRange: [0, 1]
})
}
flipCard() {
if (this.value >= 90) {
Animated.spring(this.animatedValue,{
toValue: 0,
friction: 8,
tension: 10
}).start();
} else {
Animated.spring(this.animatedValue,{
toValue: 180,
friction: 8,
tension: 10
}).start();
}
}
render() {
const frontAnimatedStyle = {
transform: [
{ rotateY: this.frontInterpolate }
]
}
const backAnimatedStyle = {
transform: [
{ rotateY: this.backInterpolate }
]
}
return (
<View style={{ flex:1, justifyContent:'center', alignItems:'center'}} >
<View >
<Animated.View style={[styles.flipCard, frontAnimatedStyle, {opacity: this.frontOpacity}]}>
</Animated.View>
<Animated.View style={[styles.flipCard, styles.flipCardBack, backAnimatedStyle, {opacity: this.backOpacity}]}>
<View>
<TouchableOpacity onPress={() => this.flipCard()} style={{ width:(screenWidth/2), height:70, backgroundColor:'black'}}>
<Text style={{color:'white', fontSize:22, fontWeight:'bold'}}> I am on Back</Text>
</TouchableOpacity>
</View>
</Animated.View>
</View>
</View>
);
}
}
const styles = StyleSheet.create({
flipCard: {
backfaceVisibility: 'hidden',
},
flipCardBack: {
top: 0,
},
});
我也试过react-native-card-flip
翻转.js
render() {
return (
<CardFlip style={styles.cardContainer} ref={(card) => this.card
=card}>
<FronEnd />
<Backend />
</CardFlip> }
FronEnd.js
render()
{
return (
<View>
<CardFlip style={styles.cardContainer} ref={(card) => this.card = card} >
....................................................
<TouchableOpacity onPress={() => this.card.flip()}
</TouchableOpacity >
</CardFlip>
</View>
);
}
}
后端.js
render()
{
return (
<View>
<CardFlip style={styles.cardContainer} ref={(card) => this.card = card} >
.......................
<TouchableOpacity onPress={() => this.card.flip()}
</TouchableOpacity >
</CardFlip>
</View>
);
}