QT       += core gui#core 核心模块  gui 窗口界面模块

# 在Qt4中 core gui widgets 是一体的

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11 #使用C++11标准编译

# The following define makes your compiler emit warnings if you use

# any Qt feature that has been marked deprecated (the exact warnings

# depend on your compiler). Please consult the documentation of the

# deprecated API in order to know how to port your code away from it.

DEFINES += QT_DEPRECATED_WARNINGS #编译器使用过时的Qt特性时 编译器会发出警告

# You can also make your code fail to compile if it uses deprecated APIs.

# In order to do so, uncomment the following line.

# You can also select to disable deprecated APIs only up to a certain version of Qt.

#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \#可指定的源文件 一般情况下编译器默认添加

    main.cpp \

    widget.cpp

HEADERS += \#可指定的头文件 一般情况下编译器默认添加

    widget.h

FORMS += \

    widget.ui

# Default rules for deployment.

qnx: target.path = /tmp/$${TARGET}/bin

else: unix:!android: target.path = /opt/$${TARGET}/bin

!isEmpty(target.path): INSTALLS += target