What should I do if uniapp cannot return data when obtaining geographical location?

With the rapid development of mobile Internet, more and more applications need to obtain users' geographical location information. When using Uniapp to develop mobile applications, you need to use the uni-app plug-in to obtain geographical location information. However, sometimes we find that uni-app cannot return data when obtaining geographical location information. How to solve this problem?

1. Check Permissions

First, we need to check whether the application has obtained positioning permissions. If the application does not have access permission, data will not be returned when we try to obtain geographical location information. We can use the uni.authorize() function provided by uniapp to obtain permissions. The following is a sample code:

uni.authorize({
    scope: 'scope.userLocation',
    success() {
        console.log("获取地理位置成功");
    },
    fail() {
        console.log("获取地理位置失败");
    }
});

2. Check network connection status

If the application has obtained positioning permissions, but obtains geographical location information and still cannot return data, then we need Check network connection status. One possible situation is that the user's mobile phone cannot connect to GPS or other positioning services. We can use the uni.getNetworkType() function provided by uniapp to obtain the current network connection status. The following is a sample code:

uni.getNetworkType({
    success(res) {
        const networkType = res.networkType;
        console.log("当前网络状态：" + networkType);
    }
});

3. Check location service

If the application has obtained location permissions and the network connection is normal, but still cannot obtain location information, then We need to check location services. We can check if location services are working properly by opening the Maps app within the app. If location services are not working correctly, we need to enable location services in the device settings. Additionally, we need to check if location services are working properly. The following is a sample code:

uni.openLocation({
    latitude: 0,
    longitude: 0,
    success() {
        console.log("地图应用程序启动成功");
    },
    fail() {
        console.log("地图应用程序启动失败");
    }
});

Summary

When developing mobile applications using uni-app, it is very important to obtain the user's geographical location information. When we find that obtaining geographical location information cannot return data, we need to check the code from three aspects: permissions, network connection status and location services. Using the above method, we can solve most of the problems of not being able to obtain the geolocation.

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