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vant自定义二级菜单操作

(1)组件解释:

本组件是为了解决二级联动的效果编写的,这里使用了省份和城市分开的效果,具体展示效果,可以参考下面。

(2)组件代码:

<template>
 <div>
 <button @click="showM">{{ value || "选择省份" }}</button>
 <button @click="showC">{{ value2 || "选择城市" }}</button>
 <!-- 省份 -->
 <van-popup v-model="showPicker" position="bottom">
  <van-picker
  show-toolbar
  :columns="columns"
  @confirm="onConfirm"
  @cancel="showPicker = false"
  />
 </van-popup>
 <!-- 城市 -->
 <van-popup v-model="showPicker2" position="bottom">
  <van-picker
  show-toolbar
  :columns="columns2"
  @confirm="onConfirm2"
  @cancel="showPicker2 = false"
  />
 </van-popup>
 </div>
</template>

<script>
export default {
 mounted() {},
 data() {
 return {
  value: "",
  value2: "",
  columns: ["杭州", "北京", "海南省"],
  city: [
  {
   name: "杭州",
   value: ["广州", "佛山"]
  },
  {
   name: "北京",
   value: ["海淀", "廊坊"]
  },
  {
   name: "海南省",
   value: ["三亚", "海口"]
  }
  ],
  showPicker: false,
  showPicker2: false,
  columns2: []
 };
 },
 methods: {
 onConfirm(value) {
  this.value = value;
  this.value2 = "";
  this.showPicker = false;
 },
 onConfirm2(value) {
  this.value2 = value;
  this.showPicker2 = false;
 },
 showM() {
  this.showPicker = true;
 },
 showC() {
  if (this.value) {
  let self = this;
  self.showPicker2 = true;
  self.city.forEach(v => {
   if (v.name == self.value) {
   self.value2 = self.name;
   self.columns2 = v.value;
   }
  });
  } else {
  }
 }
 },
 components: {}
};
</script>
<style lang="scss" scoped>

</style>

(3)展示效果:

vant自定义二级菜单操作

还可以结合筛选功能使用:

vant自定义二级菜单操作

补充知识:vant二级联动picker选择器

我就废话不多说了,大家还是直接看代码吧~

<van-picker :columns="columns" @change="onChange" />

const citys = {
   '浙江': ['杭州', '宁波', '温州', '嘉兴', '湖州'],
   '福建': ['福州', '厦门', '莆田', '三明', '泉州']
 };
data:{
columns: [
  {
 values: Object.keys(citys),
 className: 'column1'
  },
  {
 values: citys['浙江'],
 className: 'column2',
 defaultIndex: 2
  }
],
}
onChange(picker, values) {
  picker.setColumnValues(1, citys[values[0]]);
   console.log(values)
 },

以上这篇vant自定义二级菜单操作就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持。