How to use the geographical location acquisition function in uniapp

Uniapp is a cross-platform development framework based on Vue.js. It can develop WeChat mini programs, Apps and H5 pages at the same time. In uniapp, we can access various functions of the device by using uni-api, including the geographical location acquisition function. This article will introduce how to use the geographical location acquisition function in uniapp, and attach a code example.

First of all, to use the geographical location acquisition function in uniapp, we need to apply for permission in the manifest.json file. Add the following code to the manifest.json file:

"permission": {
  "scope.userLocation": {
    "desc": "获取地理位置"
  }
}

Then, in the page where we need to obtain the geographical location, we can use the getLocation method in uni-api to obtain the geography of the current device location information. Add the following code in methods:

methods: {
  getLocation() {
    uni.getLocation({
      type: 'gcj02',  //返回可用于uni.openLocation的经纬度
      success: function(res) {
        console.log(res)
      },
      fail: function(err) {
        console.log(err)
      }
    })
  }
}

In the code, the uni.getLocation method is used to obtain geographical location information. We can specify the returned latitude and longitude type through the type parameter. Here it is set to 'gcj02', which means that the longitude and latitude that can be used in the uni.openLocation method is returned.

In the success callback function, we can obtain geographical location information through the res parameter, including longitude res.longitude and latitude res.latitudewait.

In the fail callback function, we can get the error information through the err parameter.

Next, we can add a button to the page, and when the button is clicked, the getLocation method is triggered to obtain the geographical location information. Add the following code to the page:

<button @click="getLocation">获取地理位置</button>

After clicking the button, we can see the output geographical location information in the console.

In addition, we can also use the uni.openLocation method to open the map and display the specified geographical location information. In the page where the map needs to be opened, we can add the following code in methods:

methods: {
  openLocation() {
    uni.openLocation({
      latitude: 39.9,
      longitude: 116.4,
      name: '北京市',
      address: '中国北京市海淀区'
    })
  }
}

In the code, the uni.openLocation method is used to open the map and display the specified geographical location. We can specify the longitude and latitude of the geographical location through the latitude and longitude parameters, the name of the location through the name parameter, and the addressParameter to specify the detailed address of the location.

Add a button to the page. When the button is clicked, the openLocation method is triggered to open the map and display the specified geographical location information. Add the following code to the page:

<button @click="openLocation">打开地图</button>

After clicking the button, we can see that the map opens and displays the specified geographical location.

Through the above example, we can easily use the geolocation acquisition function in uniapp. We can obtain the geographical location information of the device through the uni.getLocation method, and open the map and display the specified geographical location through the uni.openLocation method. These features can help us develop more intelligent and personalized applications.

I hope the introduction in this article can help everyone use the geographical location acquisition function in uniapp. If you have any questions, please feel free to leave a message and I will try my best to answer them. Thanks!

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