父页面wxml：

<dropdownmenu wx:if="{{currentTabIndex === 0}}" dropDownMenuTitle='{{dropDownMenuTitle}}' dropDownMenuDistrictData='{{data1}}' dropDownMenuFilterData='{{data2}}' bind:selectedItem='selectedItem'/>

父页面js：

data1一级菜单是写死的就2个。

data: {   data1: [{                 id: 0,                 title: '不限',             },             {                 id: 1,                 title: '汽修',                 enTitle: 'qixiu',                 childModel: []             },             {                 id: 2,                 title: '汽配',                 enTitle: 'qipei',                 childModel: []             }         ], }

data1二级菜单是动态获取的。

getCategoryList() {         let that = this;         topicApi.getCategoryList(that);     },

topicApi中的getCategoryList方法

function getCategoryList(pageObj) {   let that = pageObj;   that.data.data1.forEach((item, index) => {     if (item.enTitle) {         let trade = item.enTitle;         util.request(`${api.getCategoryList}?trade=${trade}`).then(res => {         let childModel = [];         res.data.forEach((item2, index2) => {           let childModelElement = {             id: `${index}-${index2 + 1}`, // '1-1',             title: item2           };           childModel.push(childModelElement);         }); // res.data.forEach         console.log('——————————childModel: ', childModel); // 调试用         that.data.data1[index].childModel = that.data.data1[index].childModel.concat(childModel);         console.log('——————————that.data.data1[index]: ', that.data.data1[index]); // 调试用       }); // util.request       } // if (item.enTitle)   }); // forEach   that.setData({     data1: that.data.data1   })   console.log('——————————that.data.data1: ', that.data.data1); // 调试用 }

子组件相关代码：

Component({   properties: {     dropDownMenuDistrictData: {       type: Array,       value: [],       observer: function (newVal, oldVal) {         console.log('——————————属性改变了, new, old: ', newVal, oldVal); // 调试用         console.log('——————————this.properties.dropDownMenuDistrictData: ', this.properties.dropDownMenuDistrictData);       }     },   } }

问题，当data1固定值时，显示是正常的。

而当data1是我如上面代码是动态的时候，显示就为空。主要是属性变更无法监控到，网络请求还在属性变更之后。打印的日志如下。

求懂的人指点一二，跪谢