React Native实现图片轮播组件示例及技术解答

该示例演示了如何使用React Native创建一个简单的图片轮播组件，允许用户浏览多张图片。通过ScrollView组件和定时器实现自动播放和手动切换图片功能。这个组件易于定制和集成到React Native应用中。

import React, { useState, useEffect } from 'react';
import { ScrollView, Image, View } from 'react-native';

const ImageCarousel = ({ images }) => {
  const [currentImage, setCurrentImage] = useState(0);

  useEffect(() => {
    const timer = setInterval(() => {
      setCurrentImage((prevImage) =>
        prevImage === images.length - 1 ? 0 : prevImage + 1
      );
    }, 3000); // 每3秒切换一次图片

    return () => clearInterval(timer);
  }, [images]);

  const changeImage = (index) => {
    setCurrentImage(index);
  };

  return (
    <View>
      <ScrollView horizontal pagingEnabled>
        {images.map((image, index) => (
          <Image
            key={index}
            source={image}
            style={{ width: 300, height: 200 }}
          />
        ))}
      </ScrollView>
    </View>
  );
};

// 使用方式
const images = [
  require('./assets/image1.jpg'),
  require('./assets/image2.jpg'),
  require('./assets/image3.jpg'),
];

<ImageCarousel images={images} />

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