1、QT思维导图

2、自由发挥应用场景，实现登录

#include "mywidget.h"MyWidget::MyWidget(QWidget *parent): QWidget(parent)
{this->resize(642,493);this->setFixedSize(642,493);this->setWindowIcon(QIcon("D:/QTText/pictrue/qq.png"));this->setStyleSheet("background-color:white");this->setWindowFlag(Qt::FramelessWindowHint);QLabel * lab1 = new QLabel(this);lab1->resize(642,190);lab1->setStyleSheet("background-color:pink");QMovie *mv = new QMovie("D:/QTText/pictrue/qq.gif");lab1->setMovie(mv);mv->start();lab1->setScaledContents(true);QLabel *lab2 = new QLabel(this);lab2->resize(24,35);lab2->move(154,260);lab2->setPixmap(QPixmap("D:\\QTText\\pictrue\\userName.jpg"));lab2->setScaledContents(true);QLabel *lab3 = new QLabel(this);lab3->resize(24,35);lab3->move(154,313);lab3->setPixmap(QPixmap("D:\\QTText\\pictrue\\passwd.jpg"));lab3->setScaledContents(true);QLineEdit * edit1 = new QLineEdit(this);edit1->resize(335,36);edit1->move(180,260);edit1->setPlaceholderText("QQ号/手机号/邮箱");QLineEdit *edit2 = new QLineEdit(this);edit2->resize(335,36);edit2->move(180,313);edit2->setPlaceholderText("密码");edit2->setEchoMode(QLineEdit::Password);QPushButton *btn = new QPushButton("登录",this);btn->resize(360,45);btn->move(154,410);btn->setStyleSheet("background-color:rgb(8,189,253);border-radius:5px;color:white");}MyWidget::~MyWidget()
{
}