使用React native以每分钟步数为单位获得跑步/步行速度

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

const SpeedTracker = () => {
  const [steps, setSteps] = useState(0);
  const [startTime, setStartTime] = useState(Date.now());
  const [speed, setSpeed] = useState(0);

  useEffect(() => {
    const interval = setInterval(() => {
      const currentTime = Date.now();
      const elapsedTime = (currentTime - startTime) / 1000 / 60; // 转换为分钟
      if (elapsedTime > 0) {
        const currentSpeed = steps / elapsedTime;
        setSpeed(currentSpeed);
      }
    }, 1000); // 每秒更新一次

    return () => clearInterval(interval);
  }, [steps, startTime]);

  const incrementSteps = () => {
    setSteps(steps + 1);
  };

  return (
    <View style={styles.container}>
      <Text>Steps: {steps}</Text>
      <Text>Speed (steps/min): {speed.toFixed(2)}</Text>
      <Button title="Increment Steps" onPress={incrementSteps} />
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
});

export default SpeedTracker;