QT入门（一）

安装 http://www.qt.io/download/

然后设置编译器 调试器 QT库版本

QT-tool:

1. QT Assistant
2. QT Designer
3. QT Examples and Demos
4. QT Linguist

//hello.cpp

#include "hello.h"

#include <QApplication>

#include <QLabel>

int main(int argc, char *argv[])

{

    QApplication a(argc, argv);

    QLabel* label = new QLabel("<h2>hello</h2>");//simple html layout

    label->show();

    return a.exec();

}

//buildconn

#include "buildconn.h"

#include <QApplication>

#include <QPushButton>

int main(int argc, char *argv[])

{

    QApplication a(argc, argv);

    QPushButton* button = new QPushButton("quit");

    QObject::connect(button, SIGNAL(clicked(bool)), &a, SLOT(quit()));

    button->show();

    return a.exec();

}

ctrl+space 强制补全

qmake -project （convert .pro to Makefile)

qmake

make (complier)

uic -o ui.h ui.ui //编译UI

ctrl + num 快捷键

#-------------------------------------------------

#

# Project created by QtCreator 2018-06-13T03:19:52

#

#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = TopC

TEMPLATE = app

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

# any feature of Qt which has been marked as 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

# You can also make your code fail to compile if you use 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 += \

        main.cpp \

        topc.cpp

HEADERS += \

        topc.h

FORMS += \

        topc.ui