UniApp implementation guide for geographical location selection and address search

UniApp is a cross-platform development framework developed based on Vue.js. It is characterized by writing once and running on multiple terminals. It can develop applications for multiple platforms such as iOS, Android, and H5 at the same time. In many location-related applications, location selection and address search are very important functions. This article will guide you through the implementation guide of geographical location selection and address search through UniApp, and provide relevant code examples.

Geographical location selection

Geographical location selection means that the user determines location information by selecting a location on the map. In UniApp, you can use the uni.chooseLocation API to implement location selection.

First, we need to add positioning permissions in the manifest.json file of the uni-app project. Add the "location" permission in the "permissions" field of the file.

{
  "permissions": {
    "location": {
      "desc": "你的位置信息将用于地理位置选择功能"
    }
  }
}

Next, in the page that needs to use geographical location selection, we can use the following code to implement the geographical location selection function.

uni.chooseLocation({
    success: function(res) {
        console.log(res.address); // 详细地址
        console.log(res.latitude); // 纬度
        console.log(res.longitude); // 经度
    },
    fail: function(error) {
        console.log(error);
    }
});

uni.chooseLocation The method accepts a success and a fail parameter, which are used to handle the successful selection of the geographical location and the failure of the selection respectively. . After successfully selecting the geographical location, we can obtain the detailed address, latitude, longitude and other information through the res parameter.

Address search

Address search means that users search for relevant address information by entering keywords. In UniApp, you can use the uni.getLocation API to implement address search.

First of all, we also need to add positioning permissions in the manifest.json file.

{
  "permissions": {
    "location": {
      "desc": "你的位置信息将用于地址搜索功能"
    }
  }
}

Next, in the pages where address search is required, we can implement the address search function through the following code.

uni.getLocation({
    type: 'gcj02',
    success: function(res) {
        let latitude = res.latitude;
        let longitude = res.longitude;
        
        uni.chooseLocation({
            success: function(res) {
                console.log(res);
            }
        });
    },
    fail: function(error) {
        console.log(error);
    }
});

The above code first obtains the current user's latitude and longitude information through uni.getLocation, and then uses the uni.chooseLocation method to let the user choose an address.

Summary

Through the guide in this article, we learned how to implement the location selection and address search functions in UniApp. We first need to add positioning permissions, and then use the uni.chooseLocation method to implement geographical location selection, and the uni.getLocation method to implement address search. Through these two methods, we can easily implement the functions of geographical location selection and address search in UniApp.

I hope this article will be helpful for everyone to learn the geographical location selection and address search functions in UniApp. The above code examples are for reference only, and the specific implementation needs to be adjusted according to project requirements. I wish you all success in UniApp development!

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