uniapp扩展组件卡片实现点赞评论转发的代码

以下是一个简单的代码示例，实现了卡片的点赞、评论和转发功能，使用了uni-ui扩展组件中的grid、icon、popover和popup组件：

<template>
  <view class="card">
    <view class="header">
      <image :src="cardData.avatarUrl" class="avatar"></image>
      <text class="username">{{cardData.username}}</text>
      <text class="time">{{cardData.time}}</text>
    </view>
    <image :src="cardData.imageUrl" class="image"></image>
    <view class="footer">
      <grid :column-num="3" class="actions">
        <block>
          <icon :type="isLiked ? 'like-fill' : 'like'" @click="handleLike"></icon>
          <text>{{likes}}</text>
        </block>
        <block>
          <icon type="chat" @click="handleComment"></icon>
          <text>{{comments}}</text>
        </block>
        <block>
          <icon type="share" @click="handleShare"></icon>
        </block>
      </grid>
    </view>
    <popover v-model="showComment" placement="bottom" trigger="manual">
      <view class="comment-popup">
        <view class="comment-list">
          <scroll-view scroll-y>
            <view v-for="(comment, index) in commentList" :key="index" class="comment-item">
              <text class="username">{{comment.username}}</text>
              <text class="text">{{comment.text}}</text>
            </view>
          </scroll-view>
        </view>
        <form class="comment-form" @submit.prevent="handleSubmit">
          <textarea placeholder="写评论" v-model="commentText"></textarea>
          <button type="submit">发送</button>
        </form>
      </view>
    </popover>
  </view>
</template>

<script>
import { Grid, Icon, Popover, Popup } from 'uni-ui'

export default {
  components: {
    Grid,
    Icon,
    Popover,
    Popup
  },
  props: {
    cardData: {
      type: Object,
      required: true
    }
  },
  data() {
    return {
      isLiked: false,
      likes: this.cardData.likes,
      comments: this.cardData.comments,
      showComment: false,
      commentList: this.cardData.commentList,
      commentText: ''
    }
  },
  methods: {
    handleLike() {
      this.isLiked = !this.isLiked
      this.likes += this.isLiked ? 1 : -1
    },
    handleComment() {
      this.showComment = true
    },
    handleShare() {
      // TODO: 实现转发功能
    },
    handleSubmit() {
      if (this.commentText.trim() === '') {
        return
      }
      const newComment = {
        username: '我',
        text: this.commentText
      }
      this.commentList.push(newComment)
      this.comments += 1
      this.commentText = ''
    }
  }
}
</script>

<style>
.card {
  background-color: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
  border-radius: 8px;
  margin-bottom: 16px;
}

.header {
  display: flex;
  align-items: center;
  padding: 16px;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  margin-right: 8px;
}

.username {
  font-size: 14px;
  color: #333;
}

.time {
  font-size: 12px;
  color: #999;
  margin-left: 8px;
}

.image {
  width: 100%;
  height: auto;
}

.footer {
  padding: 16px;
  display: flex;
  justify-content: space-between;
}

.actions {
  display: flex;
  align-items: center;
}

.actions block {
  display: flex;
  align-items: center;
  margin-right: 16px;
}

.actions block:last-child {
  margin-right: 0;
}

.comment-popup {
  padding: 16px;
}

.comment-list {
  height: 200px;
  margin-bottom: 16px;
}

.comment-item {
  margin-bottom: 8px;
}

.comment-item .username {
  font-size: 14px;
  color: #333;
  margin-right: 8px;
}

.comment-item .text {
  font-size: 12px;
  color: #999;
}
</style>

使用时，可以将cardData传入该组件，其中cardData应包含以下属性：

- avatarUrl：头像图片地址
- username：用户名
- time：发表时间
- imageUrl：卡片图片地址
- likes：点赞数
- comments：评论数
- commentList：评论列表，每个评论应包含username和text属性

例如：

<template>
  <view>
    <card :cardData="cardData"></card>
  </view>
</template>

<script>
import Card from '@/components/Card'

export default {
  components: {
    Card
  },
  data() {
    return {
      cardData: {
        avatarUrl: 'https://xxx.com/avatar.jpg',
        username: '小明',
        time: '2021-01-01 12:00',
        imageUrl: 'https://xxx.com/image.jpg',
        likes: 10,
        comments: 3,
        commentList: [
          { username: '小红', text: '这张照片很漂亮' },
          { username: '小刚', text: '我也想去那里玩' },
          { username: '小华', text: '好想吃这个美食啊' }
        ]
      }
    }
  }
}
</script>