小程序 多级联动picker + 按钮增加选项行
问题描述：
如图，要做一个多级联动+增加行的功能
就是每一行都是一个多级联动，让客户选择，然后再一个按钮可以多一行，让客户再添加
现在多级联动已经做好了，就是小程序官网的模板改了改，增加一个行现在只是用了一个wx:for 循环，显然是不行的。。它只是重复显示了，但在任何一行修改之后，所有的数据都会变，我想要每一行都是独立的选项，应该再怎么改造一下？非常感谢！！求专家给点思路，谢谢
addOneMoreRow(){
let range=this.data.range
range+=1
this.setData({
range:range
})
},
```html
<view class="section__title">多列选择器</view>
<picker mode="multiSelector" bindchange="bindMultiPickerChange" wx:for="{{range}}" bindcolumnchange="bindMultiPickerColumnChange" value="{{multiIndex}}" range-key="product_name" range="{{multiArray}}">
<view class="picker">
当前选择：{{multiArray[0][multiIndex[0]].product_name}}，{{multiArray[1][multiIndex[1]].product_name}}
</view>
</picker>
```
答
当然要把multiIndex设置成二维数组,添加的时候multiIndex push一个默认一维数组(注意对象地址啥的不要一样了)，给picker添加
value="{{multiIndex[index]}}" data-index="{{index}}"
```,触发绑定的函数获取dataset的index,修改multiIndex对应index的子数组
答
如果我的回答对你有帮助，请点击采纳按钮，谢谢
<picker
mode="multiSelector"
bindchange="bindjobcatchange"
bindcolumnchange="bingjobcatcolumnchange"
value="{{multiIndex}}"
range="{{job_cat_list}}"
range-key="{{'cat_name'}}"
>
<view class="picker">
{{fenlei_title}}
</view>
</picker>
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)
}
})
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);
}