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Uniapp is a cross-platform application development framework that can quickly build applications for different platforms. In Uniapp, it is also very simple to implement the positioning function, which can be easily implemented with only simple configuration.
1. Preparations for implementing positioning in Uniapp
Before implementing positioning, you need to introduce the positioning plug-in that comes with uni-app into the project. You can pass the "AppManifest" in manifest.json Add the "permissions" and "plugins" attributes under the "node, and add the "location" plug-in to implement:
{
"AppManifest": {
"permissions": ["android.permission.ACCESS_FINE_LOCATION"], "plugins": { "location": { "version": "1.1.0", "provider": "uni.plugin.location" } }
}
}
At the same time, you also need to understand several important configuration files in uni-app:
2. Obtaining location information
The method of obtaining location information has been encapsulated in the built-in location plug-in of uni-app, and can be obtained directly by calling the getLocation() function. This function accepts two parameters:
success: The callback function after the positioning information is successfully obtained. The parameters inside the function are:
At the same time, Before obtaining positioning information, it is necessary to determine whether the user authorizes the application to use the positioning function. User authorization can be requested by calling the uni.authorize() function. The sample code is as follows:
uni.authorize({
scope: 'scope.userLocation',
success() {
// 用户授权成功
},
fail() {
// 用户拒绝授权
}
})
3. Display the positioning information on the page
Obtain the positioning information After that, it can be displayed on the page. You can use Vue's data binding syntax to render the obtained information such as longitude, latitude, and detailed address on the page.
On the page, you can use the components provided in uni-app, such as view, text, image, etc., to display positioning information.
If you want to display geographical location information on the map, you can use the built-in map component of uni-app and set the center and markers attributes to determine the center and marker location of the map.
In general, it is very simple to use uni-app to implement positioning functions. Just introduce the location plug-in and call the getLocation() function to obtain the location information.
At the same time, although the positioning function is simple to implement, it should not be used casually when considering user privacy. In addition, user authorization, mobile phone model and other factors must also be considered to make the function more complete.
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