js页面的代码: //创建节点选择器 var query = wx.createSelectorQuery(); //选择id var that = this; query.select('.every').boundingClientRect(function (rect) { // console.log(rect.width) that.setData({ height: rect.width + 'px' }) }).exec(); wxml页面代码如下: <view class='every' style='height:{{height}}'></view>