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本质就是设置一个变量isshare来判断是否是分享页面中进入的

页面js-data中设置

isshare: 0,//不是分享页面进入

onShareAppMessage: function () {return {title: 'xxx',path: 'pages/MyPages/detail?isshare=1&&id=' + this.data.id}},backHome: function () {wx.reLaunch({url: '/pages/home/index'})}

onload

    if (options.isshare == 1) {console.log('是分享进入');this.setData({'isshare': options.isshare})}

wxml

<image wx:if="{{isshare}}" bindtap='backHome' class='d-back-home' src='http://cdn.xcx.pemarket.com.cn/icon-Return%20to%20the%20home%20page.png' lazy-load></image>

/* 回到首页icon,固定定位*/
.d-back-home {position: fixed;width: 96rpx;height: 96rpx;right: 30rpx;bottom: 166rpx;z-index: 10000;
}