QT使用pyqtSignal跳转窗口问题

xaiohuo

登录页面代码：

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import qdarkstyle
import hashlib
from db.db import DB


class SignInWidget(QWidget):
    is_admin_signal = pyqtSignal()
    is_student_signal = pyqtSignal(str)

    def __init__(self):
        super(SignInWidget, self).__init__()
        self.resize(900, 600)
        self.setWindowTitle("图书馆管理系统")
        self.setUpUI()

    def setUpUI(self):
        self.Vlayout = QVBoxLayout(self)
        self.Hlayout1 = QHBoxLayout()
        self.Hlayout2 = QHBoxLayout()
        self.formlayout = QFormLayout()

        self.label1 = QLabel("学号: ")
        labelFont = QFont()
        labelFont.setPixelSize(18)
        lineEditFont = QFont()
        lineEditFont.setPixelSize(16)
        self.label1.setFont(labelFont)
        self.lineEdit1 = QLineEdit()
        self.lineEdit1.setFixedHeight(32)
        self.lineEdit1.setFixedWidth(200)
        self.lineEdit1.setFont(lineEditFont)
        self.lineEdit1.setMaxLength(16)

        self.formlayout.addRow(self.label1, self.lineEdit1)

        self.label2 = QLabel("密码: ")
        self.label2.setFont(labelFont)
        self.lineEdit2 = QLineEdit()
        self.lineEdit2.setFixedHeight(32)
        self.lineEdit2.setFixedWidth(200)
        self.lineEdit2.setMaxLength(16)

        # 设置验证
        reg = QRegExp("PB[0~9]{8}")
        pValidator = QRegExpValidator(self)
        pValidator.setRegExp(reg)
        self.lineEdit1.setValidator(pValidator)

        reg = QRegExp("[a-zA-z0-9]+$")
        pValidator.setRegExp(reg)
        self.lineEdit2.setValidator(pValidator)

        passwordFont = QFont()
        passwordFont.setPixelSize(10)
        self.lineEdit2.setFont(passwordFont)

        self.lineEdit2.setEchoMode(QLineEdit.Password)
        self.formlayout.addRow(self.label2, self.lineEdit2)
        self.signIn = QPushButton("登 录")
        self.signIn.setFixedWidth(160)
        self.signIn.setFixedHeight(40)
        self.signIn.setFont(labelFont)
        self.formlayout.addRow("", self.signIn)

        self.label = QLabel("图书管理系统")
        fontlabel = QFont()
        fontlabel.setPixelSize(30)
        self.label.setFixedWidth(200)
        # self.label.setFixedHeight(80)
        self.label.setFont(fontlabel)
        self.Hlayout1.addWidget(self.label, Qt.AlignCenter)
        self.widget1 = QWidget()
        self.widget1.setLayout(self.Hlayout1)
        self.widget2 = QWidget()
        self.widget2.setFixedWidth(300)
        self.widget2.setFixedHeight(150)
        self.widget2.setLayout(self.formlayout)
        self.Hlayout2.addWidget(self.widget2, Qt.AlignCenter)
        self.widget = QWidget()
        self.widget.setLayout(self.Hlayout2)
        self.Vlayout.addWidget(self.widget1)
        self.Vlayout.addWidget(self.widget, Qt.AlignTop)

        self.signIn.clicked.connect(self.signInCheck)
        self.lineEdit2.returnPressed.connect(self.signInCheck)
        self.lineEdit1.returnPressed.connect(self.signInCheck)

    def signInCheck(self):
        number_Id = self.lineEdit1.text()
        password = self.lineEdit2.text()
        if number_Id == "" or password == "":
            print(QMessageBox.warning(self, "警告", "学号和密码不可为空!", QMessageBox.Yes, QMessageBox.Yes))
            return
        # 打开数据库连接
        db = DB()
        count, res = db.query_super(table_name='user', column_name='StudentId', condition=number_Id)
        print(count, res)
        hash = hashlib.md5()
        hash.update(password.encode(encoding='utf-8'))
        if count == 0:
            print(QMessageBox.information(self, "提示", "该账号不存在!", QMessageBox.Yes, QMessageBox.Yes))
        else:
            if number_Id == res[0][1] and hash.hexdigest() == res[0][3]:
                if res[0][4] == '0':
                    self.is_admin_signal.emit()
                else:
                   self.is_student_signal.emit(number_Id)
            else:
                print(QMessageBox.information(self, "提示", "密码错误!", QMessageBox.Yes, QMessageBox.Yes))
        return


if __name__ == "__main__":
    app = QApplication(sys.argv)
    app.setWindowIcon(QIcon("./images/MainWindow_1.png"))
    app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
    mainMindow = SignInWidget()
    mainMindow.show()
    sys.exit(app.exec_())

学生主页：

import sys

from PyQt5 import sip
from PyQt5.QtWidgets import *
from PyQt5.QtGui import QIcon, QFont
from PyQt5.QtCore import Qt
import qdarkstyle
from BookStorageViewer import BookStorageViewer
from borrowBookDialog import borrowBookDialog
from returnBookDialog import returnBookDialog
from BorrowStatusViewer import BorrowStatusViewer


class StudentHome(QWidget):
    def __init__(self, studentId):
        super(StudentHome, self).__init__()
        self.StudentId = studentId
        self.resize(700, 600)
        self.setWindowTitle("欢迎使用图书馆管理系统")
        self.setUpUI()

    def setUpUI(self):
        # 总布局
        self.layout = QHBoxLayout(self)
        # 按钮布局
        self.buttonLayout = QVBoxLayout()
        # 按钮
        self.borrowBookButton = QPushButton("借书")
        self.returnBookButton = QPushButton("还书")
        self.myBookStatus = QPushButton("借阅状态")
        self.allBookButton = QPushButton("所有书籍")
        self.buttonLayout.addWidget(self.borrowBookButton)
        self.buttonLayout.addWidget(self.returnBookButton)
        self.buttonLayout.addWidget(self.myBookStatus)
        self.buttonLayout.addWidget(self.allBookButton)
        self.borrowBookButton.setFixedWidth(100)
        self.borrowBookButton.setFixedHeight(42)
        self.returnBookButton.setFixedWidth(100)
        self.returnBookButton.setFixedHeight(42)
        self.myBookStatus.setFixedWidth(100)
        self.myBookStatus.setFixedHeight(42)
        self.allBookButton.setFixedWidth(100)
        self.allBookButton.setFixedHeight(42)
        font = QFont()
        font.setPixelSize(16)
        self.borrowBookButton.setFont(font)
        self.returnBookButton.setFont(font)
        self.myBookStatus.setFont(font)
        self.allBookButton.setFont(font)

        self.storageView = BookStorageViewer()
        self.borrowStatusView = BorrowStatusViewer(self.StudentId)
        self.allBookButton.setEnabled(False)

        self.layout.addLayout(self.buttonLayout)
        self.layout.addWidget(self.storageView)
        self.borrowBookButton.clicked.connect(self.borrowBookButtonClicked)
        self.returnBookButton.clicked.connect(self.returnBookButtonClicked)
        self.myBookStatus.clicked.connect(self.myBookStatusClicked)
        self.allBookButton.clicked.connect(self.allBookButtonClicked)

    def borrowBookButtonClicked(self):
        borrowDialog = borrowBookDialog(self.StudentId, self)
        borrowDialog.borrow_book_success_signal.connect(self.borrowStatusView.borrowedQuery)
        borrowDialog.borrow_book_success_signal.connect(self.storageView.searchButtonClicked)
        borrowDialog.show()
        borrowDialog.exec_()
        return

    def returnBookButtonClicked(self):
        returnDialog = returnBookDialog(self.StudentId, self)
        returnDialog.return_book_success_signal.connect(self.borrowStatusView.returnedQuery)
        returnDialog.return_book_success_signal.connect(self.borrowStatusView.borrowedQuery)
        returnDialog.return_book_success_signal.connect(self.storageView.searchButtonClicked)
        returnDialog.show()
        returnDialog.exec_()

    def myBookStatusClicked(self):
        self.layout.removeWidget(self.storageView)
        sip.delete(self.storageView)
        self.storageView = BookStorageViewer()
        self.borrowStatusView = BorrowStatusViewer(self.StudentId)
        self.layout.addWidget(self.borrowStatusView)
        self.allBookButton.setEnabled(True)
        self.myBookStatus.setEnabled(False)
        return

    def allBookButtonClicked(self):
        self.layout.removeWidget(self.borrowStatusView)
        sip.delete(self.borrowStatusView)
        self.borrowStatusView = BorrowStatusViewer(self.StudentId)
        self.storageView = BookStorageViewer()
        self.layout.addWidget(self.storageView)
        self.allBookButton.setEnabled(False)
        self.myBookStatus.setEnabled(True)
        return


if __name__ == '__main__':
    app = QApplication(sys.argv)
    app.setWindowIcon(QIcon("./images/MainWindow_1.png"))
    app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
    mainMindow = StudentHome("123456")
    mainMindow.show()
    sys.exit(app.exec_())

管理员主页：

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
import qdarkstyle
from addBookDialog import addBookDialog
from dropBookDialog import dropBookDialog
from BookStorageViewer import BookStorageViewer
from UserManage import UserManage


class AdminHome(QWidget):
    def __init__(self):
        super().__init__()
        self.setUpUI()

    def setUpUI(self):
        self.resize(900, 600)
        self.setWindowTitle("欢迎使用图书馆管理系统")
        self.layout = QHBoxLayout()
        self.buttonlayout = QVBoxLayout()
        self.setLayout(self.layout)

        font = QFont()
        font.setPixelSize(16)
        self.userManageButton = QPushButton("用户管理")
        self.addBookButton = QPushButton("添加书籍")
        self.dropBookButton = QPushButton("淘汰书籍")
        self.userManageButton.setFont(font)
        self.addBookButton.setFont(font)
        self.dropBookButton.setFont(font)
        self.userManageButton.setFixedWidth(100)
        self.userManageButton.setFixedHeight(42)
        self.addBookButton.setFixedWidth(100)
        self.addBookButton.setFixedHeight(42)
        self.dropBookButton.setFixedWidth(100)
        self.dropBookButton.setFixedHeight(42)
        self.buttonlayout.addWidget(self.addBookButton)
        self.buttonlayout.addWidget(self.dropBookButton)
        self.buttonlayout.addWidget(self.userManageButton)
        self.layout.addLayout(self.buttonlayout)
        self.storageView = BookStorageViewer()
        self.layout.addWidget(self.storageView)

        self.addBookButton.clicked.connect(self.addBookButtonClicked)
        self.dropBookButton.clicked.connect(self.dropBookButtonClicked)
        self.userManageButton.clicked.connect(self.userManage)

    def addBookButtonClicked(self):
        addDialog = addBookDialog(self)
        addDialog.add_book_success_signal.connect(self.storageView.searchButtonClicked)
        addDialog.show()
        addDialog.exec_()

    def dropBookButtonClicked(self):
        dropDialog = dropBookDialog(self)
        dropDialog.drop_book_successful_signal.connect(self.storageView.searchButtonClicked)
        dropDialog.show()
        dropDialog.exec_()

    def userManage(self):
        UserDelete = UserManage(self)
        UserDelete.show()
        UserDelete.exec_()


if __name__ == "__main__":
    app = QApplication(sys.argv)
    app.setWindowIcon(QIcon("./images/MainWindow_1.png"))
    app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
    mainMindow = AdminHome()
    mainMindow.show()
    sys.exit(app.exec_())

数据库文件：

CREATE TABLE `user` (
  `id` varchar(64) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
  `StudentId` varchar(16) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
  `Name` varchar(20) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
  `Password` char(32) COLLATE utf8_unicode_ci NOT NULL,
  `IsAdmin` bit(1) NOT NULL DEFAULT b'0',
  `TimesBorrowed` int(11) NOT NULL DEFAULT '0',
  `NumBorrowed` int(11) NOT NULL DEFAULT '0',
  PRIMARY KEY (`id`),
  UNIQUE KEY `Unique_studentID` (`StudentId`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('01aa6e87-eefc-41b6-8627-f426e75cb2d1', '201725210151', 'admin', 'e10adc3949ba59abbe56e057f20f883e', '0', '0', '0');

如何在登录页面登录成功后，跳转到其它两个页面；

疾风怪盗

跳转到其他页面，其实就是窗口的隐藏和显示吧

另外加一个__init__.py，来设置，主窗口，和其他窗口的显示隐藏的代码

hrp

窗口实例不是有show和close方法么

mrcrisis

当初我自己写的是这么用的
检测先谈一个对话框 对话框有选项检测时学生还是管理员

                               
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