Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    //==============窗口相关设置=======
    this->setFixedSize(540,720);
    //背景颜色
    this->setStyleSheet("background-color:white");
    //去掉头部
    this->setWindowFlag(Qt::FramelessWindowHint);

    //============标签相关设置=======
    QLabel *lab1 = new QLabel(this);
    //设置大小
    lab1->resize(50, 153);
    lab1->move(0,53);
    lab1->setPixmap(QPixmap("C:\\Users\\LENOVO\\Desktop\\pictrue\\lenovo.png"));
    //自动适应
    lab1->setScaledContents(true);

    QLabel *lab2 = new QLabel("账号密码登录",this);
    lab2->resize(220,50);
    lab2->move(110,60);

    QLabel *lab3 = new QLabel("忘记密码",this);
    lab3->resize(100,30);
    lab3->move(120,470);
    lab3->setStyleSheet("color:blue");

    QLabel *lab4 = new QLabel("没有账号吗?",this);
    lab4->resize(110,30);
    lab4->move(120,620);

    QLabel *lab5 = new QLabel("立即注册",this);
    lab5->resize(130,35);
    lab5->move(230,620);
    lab5->setStyleSheet("color:blue");

    //============行编辑器相关设置=======
    QLineEdit *edit1 = new QLineEdit(this);
    edit1->resize(330,48);
    edit1->move(120,180);
    edit1->setPlaceholderText("邮箱/手机号");


    QLineEdit *edit2 = new QLineEdit(this);
    edit2->resize(330,48);
    edit2->move(120,255);
    edit2->setPlaceholderText("密码");
    edit2->setEchoMode(QLineEdit::Password);


    //============按钮相关设置=======
    QPushButton *btn = new QPushButton("登录",this);
    btn->resize(180,55);
    btn->move(120,385);
    //样式函数setStyleSheet()
    btn->setStyleSheet("background-color:rgb(8,189,253);border-radius:5px;color:white");
}