QGIS二次开发（1）画布加载矢量数据

QGIS环境搭建好后，我跟着写了一个基础的项目：使用qgis画布加载矢量数据

首先准备好一个.shp文件，也就是我们的矢量图。

创建一个基类为QMainWindow的项目，在.pro文件里增添xml模块，并引入库文件的目录（自定义）

QT       += core gui xml

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

DEFINES += QT_DEPRECATED_WARNINGS
DEFINES += _USE_MATH_DEFINES
LIBS += -L"D:\OSGeo4w\apps\qgis-ltr\lib" -lqgis_core -lqgis_gui -lqgis_3d -lqgis_analysis -lqgis_app -lqgis_native -lqgis_server
LIBS += -L"D:\OSGeo4w\apps\Qt5\lib" -lQt53DCore -lQt53DRender -lQt5Core -lQt5Gui

INCLUDEPATH += "D:\OSGeo4w\apps\qgis-ltr\include"
INCLUDEPATH += "D:\OSGeo4w\include"
INCLUDEPATH += "D:\OSGeo4w\apps\Qt5\include\Qt3DCore"

SOURCES += \
    main.cpp \
    mainwindow.cpp

HEADERS += \
    mainwindow.h

# Default rules