我正在尝试在 React Native 的一个组件中使用 useRef(),但我不断收到
<块引用>组件异常:无效的挂钩调用。钩子只能被调用 函数组件主体内部
我的组件:
import React, { createRef, useRef } from 'react';
import { Animated, View } from 'react-native';
const BottomTabMenu: React.FC = ({ navigation, state: { routeNames } }) => {
const xPosition = useRef(new Animated.Value(0)).current;
return (
<Container>
<Animated.View style={{
position: 'absolute', left: 37, top: 32,
transform: [
{
translateX: xPosition
}
]
}}>
<LinearGradient
start={{ x: 0, y: 0 }} end={{ x: 1, y: 0 }}
colors={['#FF151B', '#AA0089']}
style={{
height: 40, width: 50, borderRadius: 20 }}>
</LinearGradient>
</Animated.View>
<BottomTabMenuItem icon={require('../assets/performance.png')} title="Performance" onPress={() => navigation.navigate('Performance')} />
<BottomTabMenuItem icon={require('../assets/wallet.png')} title="Carteira" onPress={() => navigation.navigate('Wallet')} />
<BottomTabMenuItem icon={require('../assets/transactions.png')} title="Extrato" onPress={() => navigation.navigate('Transactions')} />
<BottomTabMenuItem icon={require('../assets/settings.png')} title="Ajustes" onPress={() => navigation.navigate('Settings')} />
</Container>
)
}
我在其他组件中使用过 useRef 没有任何问题.. 特别是这个是底部选项卡选项卡..
非常感谢任何帮助!
答案 0 :(得分:1)
原来我在BottomTabNavigator组件中以错误的方式调用了这个组件..
之前:
<TabMenu.Navigator initialRouteName="Performance" tabBar={BottomTabMenu}>
<TabMenu.Screen name="Performance" component={Performance} />
<TabMenu.Screen name="Wallet" component={Wallet} />
<TabMenu.Screen name="Transactions" component={Transactions} />
<TabMenu.Screen name="Settings" component={Settings} />
</TabMenu.Navigator>
之后:
<TabMenu.Navigator initialRouteName="Performance" tabBar={props => <BottomTabMenu {...props} />}>
<TabMenu.Screen name="Performance" component={Performance} />
<TabMenu.Screen name="Wallet" component={Wallet} />
<TabMenu.Screen name="Transactions" component={Transactions} />
<TabMenu.Screen name="Settings" component={Settings} />
</TabMenu.Navigator>
这段代码 tabBar={props => <BottomTabMenu {...props} />}
起到了作用..
感谢@CharlesKornoelje 和@RowanX 的帮助
答案 1 :(得分:0)
尝试执行以下操作:
const xPosition = React.useRef<HTMLElement | null>( new Animated.Value(0)).current
useRef
接收类型与 useState 钩子相同。你只需要将它传递到 <>.