How to use map positioning function to select location in uniapp

How to use the map positioning function in uniapp to achieve location selection

With the development of the mobile Internet, the map positioning function has been widely used in various applications. In uniapp, we can use the map positioning function it provides to implement the location selection function to help users accurately select the target location.

uniapp is a cross-platform framework developed based on Vue.js, which can be written once and run on multiple terminals. It supports a variety of project types, including App, H5, and small programs. Using the map positioning function in uniapp can be achieved by calling uniapp's positioning API. Below we will introduce in detail how to use the map positioning function in uniapp to achieve location selection.

First of all, we need to introduce the uni-app plug-in officially provided by uni-app into the uniapp project. In HBuilderX, we can add the "uni-location" plug-in in the "plugins" array of the "uni" node in the manifest.json file, as shown below:

"uni": {
  "title": "uni",
  "plugins": {
    "uni-location": {
      "version": "1.3.5",
      "provider": "aliyun"
    }
  }
},

After introducing the plug-in, we need to Introduce map components into pages that use the map positioning function. In the vue file of the page, you can introduce the uni-location component provided by uni-app, as shown below:

import uniLocation from '@/uni_modules/uni-location/components/uni-location.vue'

Then, in the vue file of the page, we can use uni-location component to display the map, and obtain the location selected by the user by listening to the event of the component. The sample code is as follows:

<template>
  <view>
    <uni-location @select="handleSelect"></uni-location>
  </view>
</template>

<script>
export default {
  methods: {
    handleSelect(location) {
      console.log(location)
      // 在这里处理用户选择的位置信息
    }
  }
}
</script>

In the above code, we obtain the location information selected by the user by listening to the select event of the uni-location component, and then we can These location information are processed in the handleSelect method. For example, we can save location information locally or upload it to a server.

Let’s introduce the structure and usage of the parameter location of the handleSelect method in detail. The location parameter is an object containing user-selected location information, which includes the following fields:

• longitude: Longitude
• latitude：Latitude
• address：Detailed address
• name：Place name
• city: City name
• province: Province name

We can process these location information as needed, such as displaying the selected location on the map, Or call other interfaces to obtain detailed information about the location.

To sum up, using the map positioning function in uniapp to implement the location selection function requires the introduction of the map plug-in provided by uniapp, and the introduction of the map component into the pages that need to use the map positioning function. By listening to the events of the map component, you can obtain the location information selected by the user and process the location information in the callback function. The specific usage method can be freely expanded according to actual needs.

The above is the sample code and steps for using the map positioning function to achieve location selection in uniapp. Hope this helps!

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