如何在uniapp中实现图片上传和预览

<template>
  <view>
    <image v-for="(item, index) in images" :key="index" :src="item.url"></image>
    <button @tap="chooseImage">选择图片</button>
    <button @tap="uploadImage">上传图片</button>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        images: [], // 用于存储选择的图片
      }
    },
    methods: {
      chooseImage() {
        uni.chooseImage({
          count: 9, // 最多选择9张图片
          success: (res) => {
            this.images = this.images.concat(res.tempFilePaths)
          }
        })
      },
      uploadImage() {
        this.images.forEach((item, index) => {
          uni.uploadFile({
            url: 'http://example.com/upload', // 上传图片的接口地址
            filePath: item,
            name: 'file',
            success: (res) => {
              console.log(res.data) // 上传成功后的返回数据
            }
          })
        })
      }
    }
  }
</script>

<template>
  <view>
    <image v-for="(item, index) in images" :key="index" :src="item.url" @tap="previewImage(index)"></image>
    <button @tap="chooseImage">选择图片</button>
    <button @tap="uploadImage">上传图片</button>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        images: [], // 用于存储选择的图片
      }
    },
    methods: {
      chooseImage() {
        uni.chooseImage({
          count: 9, // 最多选择9张图片
          success: (res) => {
            const tempImages = res.tempFilePaths.map((item) => {
              return {
                url: item
              }
            })
            this.images = this.images.concat(tempImages)
          }
        })
      },
      uploadImage() {
        // 省略上传图片的代码
      },
      previewImage(index) {
        const urls = this.images.map((item) => {
          return item.url
        })
        uni.previewImage({
          urls: urls,
          current: index // 当前预览的图片索引
        })
      }
    }
  }
</script>