看下效果图：
直接看代码，需要的直接复制过去，可以直接使用：
#ifndef LOGINWGT_H#define LOGINWGT_H#include <QWidget>#include <QLineEdit>#include <QPushButton>#include <QLabel>#if _MSC_VER >= 1600#pragma execution_character_set("utf-8")#endifclass LoginWgt : public QLabel{Q_OBJECTpublic:explicit LoginWgt(QWidget *parent = nullptr);~LoginWgt();void Init();protected:void mousePressEvent(QMouseEvent *event);void mouseReleaseEvent(QMouseEvent *event);void mouseMoveEvent(QMouseEvent *event);signals:private:QPushButton *m_pLoginBtn=nullptr;QPushButton *m_pCancelBtn=nullptr;QPushButton *m_pRegisterBtn=nullptr;QLineEdit *m_pUserNameEdit=nullptr;QLineEdit *m_pPasswordEdit=nullptr;QPoint m_ClickePoint;bool m_bClick=false;};#endif // LOGINWGT_H
#include "loginwgt.h"#include "function.h"#include <QHBoxLayout>#include <QFont>#include <QTextCodec>#include <QMouseEvent>LoginWgt::LoginWgt(QWidget *parent) : QLabel(parent){this->resize(500,400);this->setWindowFlag(Qt::FramelessWindowHint);QPixmap pixMap(":/Image/loginbackground.jpg");this->setPixmap(pixMap);Init();}LoginWgt::~LoginWgt(){}void LoginWgt::Init(){QPushButton *minBtn=new QPushButton(this);minBtn->setFixedSize(40,40);minBtn->setIcon(QIcon(":/Image/min.png"));QPushButton *maxBtn=new QPushButton(this);maxBtn->setFixedSize(40,40);maxBtn->setIcon(QIcon(":/Image/max.png"));QPushButton *closeBtn=new QPushButton(this);closeBtn->setFixedSize(40,40);closeBtn->setIcon(QIcon(":/Image/close.png"));minBtn->setStyleSheet("QPushButton{border:none}""QPushButton::hover{background:rgb(145,237,253)}");maxBtn->setStyleSheet("QPushButton{border:none}""QPushButton::hover{background:rgb(145,237,253)}");closeBtn->setStyleSheet("QPushButton{border:none}""QPushButton::hover{background:rgb(145,237,253)}");QWidget *titleWgt=new QWidget(this);QHBoxLayout *titleLayout=new QHBoxLayout(this);titleLayout->addStretch();titleLayout->addWidget(minBtn);titleLayout->addWidget(maxBtn);titleLayout->addWidget(closeBtn);titleLayout->setSpacing(2);titleLayout->setMargin(0);titleWgt->setLayout(titleLayout);titleWgt->setStyleSheet("background:rgb(229,241,251)");titleWgt->setFixedHeight(35);QFont textFont=GetTextFont();m_pLoginBtn=new QPushButton(tr("登录"),this);m_pCancelBtn=new QPushButton(tr("取消"),this);m_pRegisterBtn=new QPushButton(tr("注册"),this);m_pUserNameEdit=new QLineEdit(this);m_pPasswordEdit=new QLineEdit(this);m_pLoginBtn->setStyleSheet("border:none;background:rgb(145,237,253)");m_pCancelBtn->setStyleSheet("border:none;background:rgb(145,237,253)");m_pLoginBtn->setFont(textFont);m_pCancelBtn->setFont(textFont);m_pRegisterBtn->setFont(textFont);m_pUserNameEdit->setFont(textFont);m_pPasswordEdit->setFont(textFont);m_pLoginBtn->setFixedSize(128,27);m_pCancelBtn->setFixedSize(128,27);m_pUserNameEdit->setFixedSize(250,27);m_pPasswordEdit->setFixedSize(250,27);m_pRegisterBtn->setFixedSize(40,27);m_pRegisterBtn->setStyleSheet("border:none;color:darkred");m_pUserNameEdit->setPlaceholderText(tr("请输入用户名"));m_pPasswordEdit->setPlaceholderText(tr("请输入密码"));m_pUserNameEdit->setStyleSheet("background:rgba(145,237,253,0.5);border:none;border-radius:2px");m_pPasswordEdit->setStyleSheet("background:rgba(145,237,253,0.5);border:none;border-radius:2px");QFont titleFont=GetTitleFont();QLabel *titleLabel=new QLabel(tr("欢迎"));titleLabel->setAlignment(Qt::AlignCenter);titleLabel->setFont(titleFont);titleLabel->setStyleSheet("color:red");//titleLabel->setFixedSize(200,50);// QLabel *userNameLabel=new QLabel(tr("用户名: "),this);// QLabel *passwordLabel=new QLabel(tr("密码: "),this);// userNameLabel->setFont(textFont);// passwordLabel->setFont(textFont);// userNameLabel->setStyleSheet("color:red");// passwordLabel->setStyleSheet("color:red");// userNameLabel->setFixedSize(50,27);// passwordLabel->setFixedSize(50,27);QWidget *userNameWgt=new QWidget(this);QHBoxLayout *userNameLayout=new QHBoxLayout(this);//userNameLayout->addWidget(userNameLabel);userNameLayout->addWidget(m_pUserNameEdit);userNameLayout->setMargin(0);userNameLayout->setSpacing(5);userNameWgt->setLayout(userNameLayout);QWidget *passWordWgt=new QWidget(this);QHBoxLayout *passWordLayout=new QHBoxLayout(this);//passWordLayout->addWidget(passwordLabel);passWordLayout->addWidget(m_pPasswordEdit);passWordLayout->setMargin(0);passWordLayout->setSpacing(5);passWordWgt->setLayout(passWordLayout);QWidget *btnWgt=new QWidget(this);QHBoxLayout *btnLayout=new QHBoxLayout(this);btnLayout->addStretch();btnLayout->addWidget(m_pLoginBtn);btnLayout->addWidget(m_pCancelBtn);btnLayout->setSpacing(20);btnLayout->setMargin(0);btnLayout->addStretch();btnWgt->setLayout(btnLayout);QWidget *RegisterWgt=new QWidget(this);QHBoxLayout *RegisterLayout=new QHBoxLayout(this);QLabel *regisLabel=new QLabel(tr("如果你还没有账号,请点击"));regisLabel->setFixedWidth(145);regisLabel->setFont(textFont);RegisterLayout->addWidget(regisLabel);RegisterLayout->addWidget(m_pRegisterBtn);RegisterLayout->setMargin(10);RegisterLayout->setSpacing(0);RegisterLayout->addStretch();RegisterWgt->setLayout(RegisterLayout);QVBoxLayout *mainLayout=new QVBoxLayout(this);mainLayout->addWidget(titleWgt);mainLayout->addWidget(titleLabel);mainLayout->addWidget(userNameWgt);mainLayout->addWidget(passWordWgt);mainLayout->addWidget(btnWgt);mainLayout->addWidget(RegisterWgt);mainLayout->setMargin(0);mainLayout->setSpacing(5);this->setLayout(mainLayout);}void LoginWgt::mousePressEvent(QMouseEvent *event){if(event->button()==Qt::LeftButton){m_ClickePoint=event->globalPos()-this->pos();m_bClick=true;}}void LoginWgt::mouseReleaseEvent(QMouseEvent *event){m_bClick=false;}void LoginWgt::mouseMoveEvent(QMouseEvent *event){if(event->buttons()==Qt::LeftButton&&m_bClick){this->move(event->globalPos()-m_ClickePoint);}}
图片自己网上找就可以了
