wxml部分

转发事件一定是绑在 button 组件上面.给button组件设置属性:open-type="share"
点击按钮直接就会触发转发的方法,可以转发给指定的微信好友.
但是这个需求还不够,用户那边收到的是 转发的那个页面,点进去以后也是那个页面

 <button class='weixin' open-type="share">
     <view class='wechatImg'>
         <image class='wechatIcon' src='../../images/wechat.png'></image>
     </view>
     <view class='sentFriend'>发送给好友</view>
</button>
js部分
/**
   * 用户点击右上角分享
   */
  onShareAppMessage: function(res) {
    let that = this;
    // console.log('主图------------->',that.data.goodsObj.MainImages)
    return {
      title: "发送给好友",
      imageUrl: that.data.goodsObj.MainImages,
      success: function(res) {
        console.log(res, "转发成功")
      },
      fail: function(res) {
        console.log(res, "转发失败")
      }
    }

  },

如果只保留页面按钮的转发,关闭微信右上角的转发 则可:
1.在onload关闭

 onLoad: function(options) {

    // 隐藏右上角分享
    wx.hideShareMenu()
}
/**
   * 用户点击右上角分享
   */
  onShareAppMessage: function(res) {
    if (res.from === "button") {
      console.log(res)
      let that = this;
      let v = that.data.OrderNumber;
      that.setData({
        flag: false,
        v: v
      })
      console.log(v, 'v===========')
      return {
        title: that.data.BrandName,
        path: 'pages/index/index?t=' + 50 + '&v=' + v,
        success: function(res) {
          console.log(res, "转发成功")

        },
        fail: function(res) {
          console.log(res, "转发失败")
        }
      }
    } else {
      console.log(res)
    }
  },
01-20 04:50