每秒响应本机更改颜色

Question

我正在尝试学习React Native，并希望使文本每秒变一次颜色。我有此代码，但是我的ios模拟器仅显示空白屏幕，根本没有文本。有人可以看看下面的代码，然后告诉我我做错了吗？

谢谢！

import React from 'react';
import { StyleSheet, Text, View } from 'react-native';

export default class App extends React.Component {
  render() {
    return (
      <View style={styles.container}>
        <ChangeColor text= 'This text should be changing color.'/>
        <ChangeColor text= 'Hopefully it works.'/>
      </View>
    );
  }
}


class ChangeColor extends React.Component {
  constructor(props) {
    super(props);
    this.state = {color: StyleSheet.skyBlue};

    // Toggle the state every second
    setInterval(() => {
      this.setState(
         { color: StyleSheet.steelBlue}
      );
    }, 1000);
  }

  render() {
    let display = this.state.color ? this.props.text : ' ';
    return (
      <Text>{display}</Text>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#fff',
    alignItems: 'center',
    justifyContent: 'center',
  },
  skyBlue: {
    color: 'skyblue',
  },
  steelBlue: {
    color: 'steelblue',
  },
});

Answer 1

看看这个小吃：https://snack.expo.io/rkFe9tpfQ

StyleSheet.steelBlue

成为

styles.steelBlue