uni-data-picker 调用接口
时间: 2024-06-08 10:06:21 浏览: 14
uni-data-picker 是 uni-app 中用于展示日期、时间、选择器的组件,它并没有直接调用接口的功能。通常情况下,你需要在组件的事件回调函数中调用接口获取数据,然后将数据传递给 uni-data-picker 进行展示。
例如,如果你需要在 uni-data-picker 中展示省市区三级联动的数据,可以按照以下步骤进行:
1. 编写一个获取省市区数据的接口,返回数据格式如下:
```json
{
"code": 0,
"msg": "",
"data": {
"provinces": [
{
"id": 1,
"name": "浙江省",
"cities": [
{
"id": 11,
"name": "杭州市",
"areas": [
{
"id": 111,
"name": "西湖区"
},
{
"id": 112,
"name": "余杭区"
}
]
},
{
"id": 12,
"name": "宁波市",
"areas": [
{
"id": 121,
"name": "海曙区"
},
{
"id": 122,
"name": "江东区"
}
]
}
]
},
{
"id": 2,
"name": "江苏省",
"cities": [
{
"id": 21,
"name": "南京市",
"areas": [
{
"id": 211,
"name": "玄武区"
},
{
"id": 212,
"name": "白下区"
}
]
},
{
"id": 22,
"name": "苏州市",
"areas": [
{
"id": 221,
"name": "姑苏区"
},
{
"id": 222,
"name": "相城区"
}
]
}
]
}
]
}
}
```
2. 在页面中使用 uni-data-picker 组件,并绑定选择器的事件回调函数,例如:
```html
<template>
<view>
<uni-data-picker
:columns="columns"
@change="onChange"
></uni-data-picker>
</view>
</template>
```
```javascript
export default {
data() {
return {
columns: [
{
values: [],
defaultIndex: 0
},
{
values: [],
defaultIndex: 0
},
{
values: [],
defaultIndex: 0
}
]
};
},
mounted() {
// 页面加载完成时,调用接口获取省市区数据,并设置到选择器中
this.getAreaData().then((data) => {
const provinces = data.provinces;
const cities = provinces[0].cities;
const areas = cities[0].areas;
this.columns[0].values = provinces.map((p) => p.name);
this.columns[1].values = cities.map((c) => c.name);
this.columns[2].values = areas.map((a) => a.name);
});
},
methods: {
getAreaData() {
// 调用获取省市区数据的接口
return new Promise((resolve, reject) => {
uni.request({
url: 'https://your-api-server.com/area',
success(res) {
if (res.statusCode === 200 && res.data.code === 0) {
resolve(res.data.data);
} else {
reject(new Error(res.data.msg || '获取数据失败'));
}
},
fail(err) {
reject(err);
}
});
});
},
onChange(e) {
const { columnIndex, value } = e.detail;
const provinces = this.columns[0].values;
const cities = this.columns[1].values;
const areas = this.columns[2].values;
switch (columnIndex) {
case 0:
// 当选择省份时,更新城市和区域的数据
const province = provinces[value];
const provinceData = this.getProvinceData(province);
const cityData = provinceData.cities;
const areaData = cityData[0].areas;
this.columns[1].values = cityData.map((c) => c.name);
this.columns[2].values = areaData.map((a) => a.name);
this.columns[0].defaultIndex = value;
this.columns[1].defaultIndex = 0;
this.columns[2].defaultIndex = 0;
break;
case 1:
// 当选择城市时,更新区域的数据
const city = cities[value];
const cityData2 = this.getCityData(city);
const areaData2 = cityData2.areas;
this.columns[2].values = areaData2.map((a) => a.name);
this.columns[1].defaultIndex = value;
this.columns[2].defaultIndex = 0;
break;
case 2:
// 当选择区域时,更新选中的值
this.columns[2].defaultIndex = value;
break;
default:
break;
}
},
getProvinceData(name) {
const data = this.areaData.provinces;
return data.find((p) => p.name === name);
},
getCityData(name) {
const provinceName = this.columns[0].values[this.columns[0].defaultIndex];
const provinceData = this.getProvinceData(provinceName);
const cities = provinceData.cities;
return cities.find((c) => c.name === name);
},
getAreaData() {
// 调用获取省市区数据的接口
return new Promise((resolve, reject) => {
uni.request({
url: 'https://your-api-server.com/area',
success(res) {
if (res.statusCode === 200 && res.data.code === 0) {
this.areaData = res.data.data;
resolve(this.areaData);
} else {
reject(new Error(res.data.msg || '获取数据失败'));
}
},
fail(err) {
reject(err);
}
});
});
}
}
};
```
在上述代码中,我们在页面加载完成时调用了接口获取省市区数据,并将数据设置到选择器中。当用户选择省份、城市、区域时,我们根据用户的选择更新其他列的数据,并最终将用户选择的值保存下来。需要注意的是,我们使用 Promise 对象来异步获取接口数据,确保数据加载完成后再进行后续操作。