微信小程序 loading 详解及实例代码

<view class="body-view">
 <loading hidden="{{hidden}}">
  加载中...
 </loading>
 <button type="default" bindtap="loadingTap">点击弹出loading</button>
</view>

Page({
 data: {
  hidden: true
 },
 loadingTap: function(){
  this.setData({
   hidden: false
  });
  var that = this;
  setTimeout(function(){
   that.setData({
    hidden: true
   });
   that.update();
  }, 3000);
 }
})