将动画与样式组件一起使用(反应本机)

Using Animated with styled-components (react-native)

我遇到以下错误(通过 iOS 测试):

Cannot read property 'getScrollableNode' of null

尝试使用 react-native 的 Animated along side styled-components 样式工具进行 react 和 react-native。

这是我创建的 <Logo /> 组件的示例:

import React from 'react';
import { Image, Dimensions } from 'react-native';
import styled from 'styled-components/native';

const { width } = Dimensions.get('window');
const logoWidth = width - (width * 0.2);
const logoHeight = logoWidth * 0.4516;

const SLogoImage = styled(Image)`
  width: ${logoWidth};
  height: ${logoHeight};
`;

const Logo = ({ ...rest }) => (
  <SLogoImage
    source={require('../assets/logo.png')}
    {...rest}
  />
);

export default Logo;

然后我将此组件导入到我想要对其应用动画的场景之一:

import React from 'react';
import { View, Animated } from 'react-native';
import Logo from '../components/Logo';

const ALogo = Animated.createAnimatedComponent(Logo);

class HomeScene extends Component {
  state = {
    fadeAnim: new Animated.Value(0)
  }

  componentDidMount() {
    Animated.timing(
      this.state.fadeAnim,
      { toValue: 1 }
    ).start()
  }

  render() {
    <View>
      <ALogo style={{ opacity: this.state.fadeAnim }} />
    </View>

  }
}

export default HomeScene;

这会导致上述错误,尝试使用谷歌搜索但无法找到任何解释。如有必要,请随时索取更多详细信息。

相关 GitHub 问题: https://github.com/styled-components/styled-components/issues/341

这个问题实际上与样式组件无关。相反,它是 react-native one

解决方法是使用 class 而不是无状态组件。

class Logo extends React.Component {
  render () {
    return (
      <SLogoImage
        source={require('./geofence.gif')}
        {...this.props}
      />
    )
  }
}

这里是 github repo 它正在工作的地方。如果有人想重现它,只需取消注释 14-21 行即可看到错误。

我认为问题来自 Animated trying to attach ref to a stateless component. And stateless components cannot have refs