代码如下：
<button data-name="shareBtn" open-type="share">分享</button>
onShareAppMessage() {
console.log('分享')
return {
title: (this.activityType === 1 ? '立即拼团-' : '好货分享-') + this.product.title,
imageUrl: this.product.img,
path: '/pages/product/detail?id=' + this.product.id + (this.product.groupShop ? '&gid=' + this.product.groupShop.id :
'')
}
} 
