微信小程序实现的picker多级联动功能示例

这篇文章主要介绍了微信小程序实现的picker多级联动功能,结合实例形式分析了微信小程序picker组件使用及wx.request后台交互相关操作技巧,需要的朋友可以参考下

本文实例讲述了微信小程序实现的picker多级联动功能。分享给大家供大家参考，具体如下：

wxml部分：

   {{fenlei_title}}

js部分：

 Page({ data: { server_url: app.globalData.URL, fenlei_title:'分类', job_cat_list:[], multiIndex: [0,0,0], filter:{ keywords:'', job_cat_id:'' } }, onLoad: function () { this.jobcat(); }, jobcat: function() { var that = this; wx.request({ url: app.globalData.URL + "/xxx/eeee", data: { x: '', y: '' }, header: { 'content-type': 'application/json' // 默认值 }, success: function (res) { var data = res.data.data; that.setData({ job_cat_list: [data, data[0]['children'], data[0]['children'][0]['children']] }); } }); }, bindjobcatchange: function(e){ this.setData({multiIndex:e.detail.value}) }, bingjobcatcolumnchange: function(e){ var index = this.data.multiIndex; const data = { job_cat_list: this.data.job_cat_list, multiIndex: this.data.multiIndex } this.data.multiIndex[e.detail.column] = e.detail.value; if (e.detail.column==0){ data.job_cat_list[1] = this.data.job_cat_list[0][index[0]]['children']; data.job_cat_list[2] = data.job_cat_list[1][index[1]]['children']; }else if(e.detail.column===1){ data.job_cat_list[2] = data.job_cat_list[1][index[1]]['children']; this.data.filter.job_cat_id = data.job_cat_list[2][index[2]]['cat_name']; }else if(e.detail.column===2){ this.data.filter.job_cat_id=data.job_cat_list[2][e.detail.value]['cat_name']; } this.setData(data) } })

php后台部分：

 public function jobcate(){ $zp_job_catModel = new ZpJobCat(); $job_cat = $zp_job_catModel->getcateAll(); $i=0; $return_data = []; foreach ($job_cat as $key=>$val){ $return_data[$i] = $val; $return_data[$i]['children'] = []; if (!empty($val['children'])){ $c=0; foreach ($val['children'] as $k=>$v){ $return_data[$i]['children'][$c] = $v; if (!empty($v['children'])){ $return_data[$i]['children'][$c]['children'] = []; $m=0; foreach ($v['children'] as $val2){ $return_data[$i]['children'][$c]['children'][$m] = $val2; $m++; } } $c++; } } $i++; } $this->_success($return_data); }

另外，本站在线工具小程序上的天气查询、车牌号归属地查询以及阴历阳历转换等工具就采用了联动查询功能，感兴趣的朋友可以扫描如下小程序码查看：