Qt Location

The Qt Location module helps you create mapping solutions using data available from popular location service providers, such as Open Street Map .

Qt Location API 能够：

Access and present map data.
Support touch gesture on a specific area of the map.
Query for a specific geographical location and route.
Add additional layers on top, such as polylines and circles.
Search for places and related images.

使用模块

QML API

To use the types, add the following import statements to your .qml 文件：

import QtPositioning
import QtLocation

注意： Many Qt Location QML module APIs are using types from the Qt Positioning module. For example, defining a coordinate to be the center of the map requires types from the Qt Positioning module.

C++ API

For C++ projects, include the header appropriate for the current use case; for example, applications using routes may use:

#include <QGeoRoute>

使用 Qt 模块的 C++ API 要求直接 (或透过其它依赖) 链接到模块库。几个构建工具对此有专用支持，包括 CMake and qmake .

构建采用 CMake

使用 find_package() 命令定位所需模块组件在 Qt6 包：

find_package(Qt6 REQUIRED COMPONENTS Location)
target_link_libraries(mytarget PRIVATE Qt6::Location)

更多细节，见构建采用 CMake 概述。

采用 qmake 构建

要配置采用 qmake 构建模块，添加模块作为值为 QT 变量在工程的 .pro 文件：

QT += location

子模块

The API is split into sub-modules, which provide QML and C++ interfaces for specific purposes. They focus mainly on Map and Place information. The required position data can be retrieved using the QtPositioning 模块。

Places

The Places submodule is the natural complement to Positioning, providing a source of geographical data about Places of Interest (POI). Besides the source information, the API provides information about the location, size, and other related information about a POI. The Places API can also retrieve images, reviews, and other content related to a place.

Places introduction:

for QML

for C++

The module provides the QML and C++ alternatives for maps and navigation. The C++ alternative provides utility classes to get geocoding (finding a geographic coordinate from a street address) and navigation (including driving and walking directions) information, whereas its QML counterpart provides UI components to render the information.

Maps and Navigation introduction:

for QML

for C++

范例

Example Apps	Examples demonstrating use of the Qt Location APIs
Maps and Navigation Tutorial	Tutorial introducing the QML Maps Types

API 参考

The following are lists of the classes and UI components provided by the module, with example applications to demonstrate their usage:

QML API Reference	Full list of QML components in the Qt Location API
C++ API Reference by domain	Full list of C++ classes and methods of the Qt Location APIs sorted by domain
C++ API Reference	Full list of C++ classes and methods of the Qt Location APIs

插件参考和参数

Information about plugins, important notes on their usage, parameters that can be provided to influence their behavior.

Qt Location Items Overlay Plugin	Provides an empty map intended to be used as background for an overlay layers for map items.
Qt Location 开放式街道地图插件	Uses Open Street Map and related services.

实现新的后端和移植

For systems integrators and distributors, information related to making Qt Location available for a new platform.

GeoServices	Information about the Qt Location GeoServices plugins
Places	Information for places backend implementors
API 变化	Information about porting from Qt 5 to Qt 6

许可

Qt Location 在商业许可下是可用的来自 Qt 公司。此外，它是可用的根据 GNU LGPL (次一般公共许可) 第 3 版，或 GNU GPL (一般公共许可) 第 2 版。见 Qt 许可进一步了解细节。