简介

1. Qt的移植性非常好，所有的平台都可以用
2. 性能不好的电脑选择qt4,否则选Qt5

自己做一个简单的界面

1. 创建工程： Application-Qt Widgets Application-基类选择Qwidget
2. pro文件解读

   #-------------------------------------------------
   #
   # Project created by QtCreator 2022-02-05T19:45:26
   #
   #-------------------------------------------------
   
   QT       += core gui  //在工程里面加入core gui模块
   
   greaterThan(QT_MAJOR_VERSION, 4): QT += widgets //如果Qt库的版本大于4，就加入Widget模块
   
   TARGET = MyfirtDesktopApp//生成App的名字
   TEMPLATE = app//编译产物的类型
   
   # 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 += \    //指定工程里面有哪些APP
           main.cpp \
           widget.cpp
   
   HEADERS += \ //指定工程里面有哪些头文件
           widget.h
   
   FORMS += \ //指定工程里面有哪些UI文件
           widget.ui
   
   

3. 添加控件（注意密码隐藏找echomode）