this -> setFixedSize(540, 410); //固定窗口大小
    this -> setWindowTitle("啊啊啊");  //设置窗口标题
    this -> setWindowIcon(QIcon("E:/1.png"));    //设置窗口图标

    QLabel *lab1 = new QLabel(this);    //构造一个标签
    lab1 -> setPixmap(QPixmap("C:/Users/yc/Desktop/icon/logo.png"));    //标签中添加图片
    lab1 -> setScaledContents(true);    //设置图片自适应
    lab1 -> move(0, 0); //标签位置
    lab1 -> resize(540,150);    //标签大小

    QLabel *lab2 = new QLabel(this);    //构建账户标签
    lab2 -> setPixmap(QPixmap("C:/Users/yc/Desktop/icon/userName.jpg"));    //标签中添加图片
    lab2 -> setScaledContents(true);    //设置图片自适应
    lab2 -> move(80, 200); //标签位置
    lab2 -> resize(50,50);    //标签大小

    QLabel *lab3 = new QLabel(this);    //构建密码标签
    lab3 -> setPixmap(QPixmap("C:/Users/yc/Desktop/icon/passwd.jpg"));    //标签中添加图片
    lab3 -> setScaledContents(true);    //设置图片自适应
    lab3 -> move(80, 280); //标签位置
    lab3 -> resize(50,50);    //标签大小

    QLineEdit *edit1 = new QLineEdit(this);
    edit1 -> setPlaceholderText("QQ号码/手机号/邮箱");
    edit1 -> move(180, 200);
    edit1 -> resize(300,50);

    QLineEdit *edit2 = new QLineEdit(this);
    edit2 -> setPlaceholderText("密码");
    edit2 -> setEchoMode(QLineEdit::Password);
    edit2 -> move(180, 280);
    edit2 -> resize(300,50);

    QPushButton *btn1 = new QPushButton(QIcon("C:/Users/yc/Desktop/icon/login.png"),"登录",this);
    btn1 -> move(260, 350);
    btn1 -> resize(100, 40);

    QPushButton *btn2 = new QPushButton(QIcon("C:/Users/yc/Desktop/icon/cancel.png"),"取消",this);
    btn2 -> move(380, 350);
    btn2 -> resize(100, 40);