qt-4.8

#include "widget.h"
Widget::Widget(QWidget *parent)
 : QWidget(parent)

{

    this->setWindowTitle("COD");

    this->setWindowIcon(QIcon("C:\\Users\\15934\\Desktop\\Qt-qq\\cod1"));

    //this->setWindowFlag(Qt::FramelessWindowHint);

    this->setFixedSize(800,500);

    QLabel *lab1 = new QLabel(this);

    lab1->resize(800,500);

    lab1->setPixmap(QPixmap("C:\\Users\\15934\\Desktop\\Qt-qq\\cod2"));

    lab1->setScaledContents((true));

    QPushButton *btn1 = new QPushButton("登录账号",this);

    btn1->resize(200,60);

    btn1->move(300,400);

    btn1->setIcon(QIcon("C:\\Users\\15934\\Desktop\\Qt-qq\\cod1"));

    QLineEdit *edit1 = new QLineEdit(this);

    edit1->resize(300,45);

    edit1->move(250,280);

    edit1->setPlaceholderText("输入Steam账号\\动视邮箱");

    QLineEdit *edit2 = new QLineEdit(this);

    edit2->resize(300,45);

    edit2->move(250,340);

    edit2->setPlaceholderText("输入密码");

    edit2->setEchoMode(QLineEdit::Password);

    QLabel *lab2 = new QLabel("注册账号",this);    
   lab2->move(240,415);    
   QLabel *lab3 = new QLabel("找回密码",this); 
   lab3->move(240,435);    
   this->setWindowFlag(Qt::FramelessWindowHint);

}

Widget::~Widget()

{

}

设置窗口标题：setWindowTitle("")
设置窗口图标：setWindowIcon(QIcon("路径"))
设置背景颜色：setStyleSheet("background:  ")
设置窗口大小：resize( )
设置窗口大小固定：setFixedSize( )
设置纯净窗口：setWindFlag(Qt::FramelessWindowHint)

QPushButton *btn = new QPushButton(this);
按钮设置文本：btn->setText(" ")
btn->move( )
设置按钮是否可用：btn->setEnabled(false)

QLineEdit *edit = new QLineEdit(this)
设置显示模式：edit->setEchMode(QLineEdit::Password)
设置占位：edit：setPlaceholderText(" ")

QLabel *lab = new QLabel(this)
设置图片：lab->setpixmap(QPixmap("图片路径"))
自动适应：lab->setScaledContents(true/f)
接受动图类：QMovie *mv = new QMovie("动图路径")
将动图设置在标签中：lab->setMovie(mv)
让动图动起来：mv->start( )