小程序如何写收藏、分享、客服功能

2022-10-14 20:41:54

前言：

商品收藏

发送请求获取数据
页面onShow的时候加载缓存中的商品收藏的数据
判断当前商品是不是被收藏
是改变页面的图标
不是则不改变

点击商品收藏按钮

判断该商品是否存在于缓存数组中
已经存在把该商品删除
没有存在把商品添加到收藏数组中存入到本地存储中即可

代码如下：

结构以及样式布局

<view class="detail_swiper">
  <swiper autoplay circular indicator-dots>
    <swiper-item wx:for="{{goodsObj.pics}}" wx:key="pics_id" bindtap="handlePrevewImage" data-url="{{item.pics_mid}}">
      <image mode="widthFix" src="{{item.pics_mid}}"></image>
    </swiper-item>
  </swiper>
</view>

<view class="goods_price">￥{{goodsObj.goods_price}}</view>
<view class="goods_name_row">
  <view class="goods_name">{{goodsObj.goods_name}}{{goodsObj.goods_name}}</view>
  <view class="goods_collect" bindtap="handleCollect">
    <text class="iconfont   {{isCollect?'icon-shoucang':'icon-shou_cang'}} "></text>
    <navigator url="/pages/collect/collect">
      <view class="collect_text">收藏</view>
    </navigator>
   
  </view>
</view>

<view class="goods_info">
  <view class="goods_info_title">图文详情</view>
  <view class="goods_info_content">
    <!-- 富文本 -->
    <!-- {{goodsObj.goods_introduce}} -->
    <rich-text nodes="{{goodsObj.goods_introduce}}"></rich-text>
  </view>
</view>

<view class="btm_tool">
  <view class="tool_item">
    <view class="iconfont icon-kefu"></view>
    <view>客服</view>
    <button open-type="contact"></button>
  </view>
  <view class="tool_item">
    <view class="iconfont icon-Share"></view>
    <view>分享</view>
    <button open-type="share"></button>
  </view>
  <navigator open-type="switchTab" url="/pages/cart/cart" class="tool_item">
    <view class="iconfont icon-shop"></view>
    <view>购物车</view>
  </navigator>
  <view class="tool_item btn_cart " bindtap="handleCartAdd">
    加入购物车
  </view>
  <view class="tool_item btn_buy">
    立即购买
  </view>
</view>

/* pages/goods_detail/detail.wxss */
page {
  padding-bottom: 90rpx;
}
.detail_swiper swiper {
  height: 65vw;
  text-align: center;
}
.detail_swiper swiper image {
  width: 60%;
}
.goods_price {
  padding: 15rpx;
  font-size: 32rpx;
  font-weight: 600;
  color: var(--themeColor);
}
.goods_name_row {
  border-top: 5rpx solid #dedede;
  border-bottom: 5rpx solid #dedede;
  padding: 10rpx 0;
  display: flex;
}
.goods_name_row .goods_name {
  flex: 5;
  color: #000;
  font-size: 30rpx;
  padding: 0 10rpx;
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}
.goods_name_row .goods_collect {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-left: 1rpx solid #000;
}
.goods_name_row .goods_collect .icon-shou_cang {
  color: orangered;
}
.icon-shoucang{
  color: red;
}
.goods_info .goods_info_title {
  font-size: 32rpx;
  color: var(--themeColor);
  font-weight: 600;
  padding: 20rpx;
}
.btm_tool {
  border-top: 1rpx solid #ccc;
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 90rpx;
  background-color: #fff;
  display: flex;
}
.btm_tool .tool_item {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-size: 24rpx;
  position: relative;
}
.btm_tool .tool_item button {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
}
.btm_tool .btn_cart {
  flex: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: #ffa500;
  color: #fff;
  font-size: 30rpx;
  font-weight: 600;
}
.btm_tool .btn_buy {
  flex: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: #eb4450;
  color: #fff;
  font-size: 30rpx;
  font-weight: 600;
}

在data中定义商品数据商品是否被收藏过利用页面监听加载onShow()函数

data: {
    goodsObj: {},
    // 商品是否被收藏
    isCollect:false
  },
  // 商品对象
  GoodsInfo: {},
  /**
   * 生命周期函数--监听页面加载
   */
  onShow: function () {
    let pages = getCurrentPages();
    let currentPage = pages[pages.length - 1];
    let options = currentPage.options;
    const { goods_id } = options;
    this.getGoodsDetail(goods_id);


  },

获取商品详情数据

// 获取商品详情数据
  async getGoodsDetail(goods_id) {
    const goodsObj = await request({ url: "/goods/detail", data: { goods_id } });
    this.GoodsInfo = goodsObj;
    // 1 获取缓存中的商品收藏的数组
    let collect = wx.getStorageSync("collect") || [];
    // 2 判断当前商品是否被收藏
    let isCollect = collect.some(v => v.goods_id === this.GoodsInfo.goods_id);
    this.setData({
      goodsObj: {
        goods_name: goodsObj.goods_name,
        goods_price: goodsObj.goods_price,
        // iphone部分手机 不识别 webp图片格式 
        // 最好找到后台 让他进行修改 
        // 临时自己改 确保后台存在 1.webp => 1.jpg 
        goods_introduce: goodsObj.goods_introduce.replace(/\.webp/g, '.jpg'),
        pics: goodsObj.pics
      },
      isCollect
    })
  },

给收藏绑定一个点击事件获取本地存储中商品收藏数组判断商品是否收藏过进行判断当index=-1时表示该商品已收藏否则没有收藏

// 点击 商品收藏图标
  handleCollect(){
    let isCollect=false;
    // 1 获取缓存中的商品收藏数组
    let collect=wx.getStorageSync("collect")||[];
    // 2 判断该商品是否被收藏过
    let index=collect.findIndex(v=>v.goods_id===this.GoodsInfo.goods_id);
    // 3 -1表示 已经收藏过 
    if(index!==-1){
      // 能找到 已经收藏过了  在数组中删除该商品
      collect.splice(index,1);
      isCollect=false;
      wx.showToast({
        title: '取消成功',
        icon: 'success',
        mask: true
      });
        
    }else{
      // 没有收藏过
      collect.push(this.GoodsInfo);
      isCollect=true;
      wx.showToast({
        title: '收藏成功',
        icon: 'success',
        mask: true
      });
    }
    // 4 把数组存入到缓存中
    wx.setStorageSync("collect", collect);
    // 5 修改data中的属性  isCollect
    this.setData({
      isCollect
    })
  }// 点击 商品收藏图标
  handleCollect(){
    let isCollect=false;
    // 1 获取缓存中的商品收藏数组
    let collect=wx.getStorageSync("collect")||[];
    // 2 判断该商品是否被收藏过
    let index=collect.findIndex(v=>v.goods_id===this.GoodsInfo.goods_id);
    // 3 -1表示 已经收藏过 
    if(index!==-1){
      // 能找到 已经收藏过了  在数组中删除该商品
      collect.splice(index,1);
      isCollect=false;
      wx.showToast({
        title: '取消成功',
        icon: 'success',
        mask: true
      });
        
    }else{
      // 没有收藏过
      collect.push(this.GoodsInfo);
      isCollect=true;
      wx.showToast({
        title: '收藏成功',
        icon: 'success',
        mask: true
      });
    }
    // 4 把数组存入到缓存中
    wx.setStorageSync("collect", collect);
    // 5 修改data中的属性  isCollect
    this.setData({
      isCollect
    })
  }

总结：详细解释见代码注释

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