QT使用pyqtSignal跳转窗口问题

xaiohuo

登录页面代码：

1. import sys
   
2. from PyQt5.QtWidgets import *
   
3. from PyQt5.QtGui import *
   
4. from PyQt5.QtCore import *
   
5. import qdarkstyle
   
6. import hashlib
   
7. from db.db import DB
   
8. 
   
9. 
   
10. class SignInWidget(QWidget):
    
11.     is_admin_signal = pyqtSignal()
    
12.     is_student_signal = pyqtSignal(str)
    
13. 
    
14.     def __init__(self):
    
15.         super(SignInWidget, self).__init__()
    
16.         self.resize(900, 600)
    
17.         self.setWindowTitle("图书馆管理系统")
    
18.         self.setUpUI()
    
19. 
    
20.     def setUpUI(self):
    
21.         self.Vlayout = QVBoxLayout(self)
    
22.         self.Hlayout1 = QHBoxLayout()
    
23.         self.Hlayout2 = QHBoxLayout()
    
24.         self.formlayout = QFormLayout()
    
25. 
    
26.         self.label1 = QLabel("学号: ")
    
27.         labelFont = QFont()
    
28.         labelFont.setPixelSize(18)
    
29.         lineEditFont = QFont()
    
30.         lineEditFont.setPixelSize(16)
    
31.         self.label1.setFont(labelFont)
    
32.         self.lineEdit1 = QLineEdit()
    
33.         self.lineEdit1.setFixedHeight(32)
    
34.         self.lineEdit1.setFixedWidth(200)
    
35.         self.lineEdit1.setFont(lineEditFont)
    
36.         self.lineEdit1.setMaxLength(16)
    
37. 
    
38.         self.formlayout.addRow(self.label1, self.lineEdit1)
    
39. 
    
40.         self.label2 = QLabel("密码: ")
    
41.         self.label2.setFont(labelFont)
    
42.         self.lineEdit2 = QLineEdit()
    
43.         self.lineEdit2.setFixedHeight(32)
    
44.         self.lineEdit2.setFixedWidth(200)
    
45.         self.lineEdit2.setMaxLength(16)
    
46. 
    
47.         # 设置验证
    
48.         reg = QRegExp("PB[0~9]{8}")
    
49.         pValidator = QRegExpValidator(self)
    
50.         pValidator.setRegExp(reg)
    
51.         self.lineEdit1.setValidator(pValidator)
    
52. 
    
53.         reg = QRegExp("[a-zA-z0-9]+$")
    
54.         pValidator.setRegExp(reg)
    
55.         self.lineEdit2.setValidator(pValidator)
    
56. 
    
57.         passwordFont = QFont()
    
58.         passwordFont.setPixelSize(10)
    
59.         self.lineEdit2.setFont(passwordFont)
    
60. 
    
61.         self.lineEdit2.setEchoMode(QLineEdit.Password)
    
62.         self.formlayout.addRow(self.label2, self.lineEdit2)
    
63.         self.signIn = QPushButton("登 录")
    
64.         self.signIn.setFixedWidth(160)
    
65.         self.signIn.setFixedHeight(40)
    
66.         self.signIn.setFont(labelFont)
    
67.         self.formlayout.addRow("", self.signIn)
    
68. 
    
69.         self.label = QLabel("图书管理系统")
    
70.         fontlabel = QFont()
    
71.         fontlabel.setPixelSize(30)
    
72.         self.label.setFixedWidth(200)
    
73.         # self.label.setFixedHeight(80)
    
74.         self.label.setFont(fontlabel)
    
75.         self.Hlayout1.addWidget(self.label, Qt.AlignCenter)
    
76.         self.widget1 = QWidget()
    
77.         self.widget1.setLayout(self.Hlayout1)
    
78.         self.widget2 = QWidget()
    
79.         self.widget2.setFixedWidth(300)
    
80.         self.widget2.setFixedHeight(150)
    
81.         self.widget2.setLayout(self.formlayout)
    
82.         self.Hlayout2.addWidget(self.widget2, Qt.AlignCenter)
    
83.         self.widget = QWidget()
    
84.         self.widget.setLayout(self.Hlayout2)
    
85.         self.Vlayout.addWidget(self.widget1)
    
86.         self.Vlayout.addWidget(self.widget, Qt.AlignTop)
    
87. 
    
88.         self.signIn.clicked.connect(self.signInCheck)
    
89.         self.lineEdit2.returnPressed.connect(self.signInCheck)
    
90.         self.lineEdit1.returnPressed.connect(self.signInCheck)
    
91. 
    
92.     def signInCheck(self):
    
93.         number_Id = self.lineEdit1.text()
    
94.         password = self.lineEdit2.text()
    
95.         if number_Id == "" or password == "":
    
96.             print(QMessageBox.warning(self, "警告", "学号和密码不可为空!", QMessageBox.Yes, QMessageBox.Yes))
    
97.             return
    
98.         # 打开数据库连接
    
99.         db = DB()
    
100.         count, res = db.query_super(table_name='user', column_name='StudentId', condition=number_Id)
     
101.         print(count, res)
     
102.         hash = hashlib.md5()
     
103.         hash.update(password.encode(encoding='utf-8'))
     
104.         if count == 0:
     
105.             print(QMessageBox.information(self, "提示", "该账号不存在!", QMessageBox.Yes, QMessageBox.Yes))
     
106.         else:
     
107.             if number_Id == res[0][1] and hash.hexdigest() == res[0][3]:
     
108.                 if res[0][4] == '0':
     
109.                     self.is_admin_signal.emit()
     
110.                 else:
     
111.                    self.is_student_signal.emit(number_Id)
     
112.             else:
     
113.                 print(QMessageBox.information(self, "提示", "密码错误!", QMessageBox.Yes, QMessageBox.Yes))
     
114.         return
     
115. 
     
116. 
     
117. if __name__ == "__main__":
     
118.     app = QApplication(sys.argv)
     
119.     app.setWindowIcon(QIcon("./images/MainWindow_1.png"))
     
120.     app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
     
121.     mainMindow = SignInWidget()
     
122.     mainMindow.show()
     
123.     sys.exit(app.exec_())
     

复制代码

学生主页：

1. import sys
   
2. 
   
3. from PyQt5 import sip
   
4. from PyQt5.QtWidgets import *
   
5. from PyQt5.QtGui import QIcon, QFont
   
6. from PyQt5.QtCore import Qt
   
7. import qdarkstyle
   
8. from BookStorageViewer import BookStorageViewer
   
9. from borrowBookDialog import borrowBookDialog
   
10. from returnBookDialog import returnBookDialog
    
11. from BorrowStatusViewer import BorrowStatusViewer
    
12. 
    
13. 
    
14. class StudentHome(QWidget):
    
15.     def __init__(self, studentId):
    
16.         super(StudentHome, self).__init__()
    
17.         self.StudentId = studentId
    
18.         self.resize(700, 600)
    
19.         self.setWindowTitle("欢迎使用图书馆管理系统")
    
20.         self.setUpUI()
    
21. 
    
22.     def setUpUI(self):
    
23.         # 总布局
    
24.         self.layout = QHBoxLayout(self)
    
25.         # 按钮布局
    
26.         self.buttonLayout = QVBoxLayout()
    
27.         # 按钮
    
28.         self.borrowBookButton = QPushButton("借书")
    
29.         self.returnBookButton = QPushButton("还书")
    
30.         self.myBookStatus = QPushButton("借阅状态")
    
31.         self.allBookButton = QPushButton("所有书籍")
    
32.         self.buttonLayout.addWidget(self.borrowBookButton)
    
33.         self.buttonLayout.addWidget(self.returnBookButton)
    
34.         self.buttonLayout.addWidget(self.myBookStatus)
    
35.         self.buttonLayout.addWidget(self.allBookButton)
    
36.         self.borrowBookButton.setFixedWidth(100)
    
37.         self.borrowBookButton.setFixedHeight(42)
    
38.         self.returnBookButton.setFixedWidth(100)
    
39.         self.returnBookButton.setFixedHeight(42)
    
40.         self.myBookStatus.setFixedWidth(100)
    
41.         self.myBookStatus.setFixedHeight(42)
    
42.         self.allBookButton.setFixedWidth(100)
    
43.         self.allBookButton.setFixedHeight(42)
    
44.         font = QFont()
    
45.         font.setPixelSize(16)
    
46.         self.borrowBookButton.setFont(font)
    
47.         self.returnBookButton.setFont(font)
    
48.         self.myBookStatus.setFont(font)
    
49.         self.allBookButton.setFont(font)
    
50. 
    
51.         self.storageView = BookStorageViewer()
    
52.         self.borrowStatusView = BorrowStatusViewer(self.StudentId)
    
53.         self.allBookButton.setEnabled(False)
    
54. 
    
55.         self.layout.addLayout(self.buttonLayout)
    
56.         self.layout.addWidget(self.storageView)
    
57.         self.borrowBookButton.clicked.connect(self.borrowBookButtonClicked)
    
58.         self.returnBookButton.clicked.connect(self.returnBookButtonClicked)
    
59.         self.myBookStatus.clicked.connect(self.myBookStatusClicked)
    
60.         self.allBookButton.clicked.connect(self.allBookButtonClicked)
    
61. 
    
62.     def borrowBookButtonClicked(self):
    
63.         borrowDialog = borrowBookDialog(self.StudentId, self)
    
64.         borrowDialog.borrow_book_success_signal.connect(self.borrowStatusView.borrowedQuery)
    
65.         borrowDialog.borrow_book_success_signal.connect(self.storageView.searchButtonClicked)
    
66.         borrowDialog.show()
    
67.         borrowDialog.exec_()
    
68.         return
    
69. 
    
70.     def returnBookButtonClicked(self):
    
71.         returnDialog = returnBookDialog(self.StudentId, self)
    
72.         returnDialog.return_book_success_signal.connect(self.borrowStatusView.returnedQuery)
    
73.         returnDialog.return_book_success_signal.connect(self.borrowStatusView.borrowedQuery)
    
74.         returnDialog.return_book_success_signal.connect(self.storageView.searchButtonClicked)
    
75.         returnDialog.show()
    
76.         returnDialog.exec_()
    
77. 
    
78.     def myBookStatusClicked(self):
    
79.         self.layout.removeWidget(self.storageView)
    
80.         sip.delete(self.storageView)
    
81.         self.storageView = BookStorageViewer()
    
82.         self.borrowStatusView = BorrowStatusViewer(self.StudentId)
    
83.         self.layout.addWidget(self.borrowStatusView)
    
84.         self.allBookButton.setEnabled(True)
    
85.         self.myBookStatus.setEnabled(False)
    
86.         return
    
87. 
    
88.     def allBookButtonClicked(self):
    
89.         self.layout.removeWidget(self.borrowStatusView)
    
90.         sip.delete(self.borrowStatusView)
    
91.         self.borrowStatusView = BorrowStatusViewer(self.StudentId)
    
92.         self.storageView = BookStorageViewer()
    
93.         self.layout.addWidget(self.storageView)
    
94.         self.allBookButton.setEnabled(False)
    
95.         self.myBookStatus.setEnabled(True)
    
96.         return
    
97. 
    
98. 
    
99. if __name__ == '__main__':
    
100.     app = QApplication(sys.argv)
     
101.     app.setWindowIcon(QIcon("./images/MainWindow_1.png"))
     
102.     app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
     
103.     mainMindow = StudentHome("123456")
     
104.     mainMindow.show()
     
105.     sys.exit(app.exec_())
     

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管理员主页：

1. import sys
   
2. from PyQt5.QtWidgets import *
   
3. from PyQt5.QtGui import *
   
4. import qdarkstyle
   
5. from addBookDialog import addBookDialog
   
6. from dropBookDialog import dropBookDialog
   
7. from BookStorageViewer import BookStorageViewer
   
8. from UserManage import UserManage
   
9. 
   
10. 
    
11. class AdminHome(QWidget):
    
12.     def __init__(self):
    
13.         super().__init__()
    
14.         self.setUpUI()
    
15. 
    
16.     def setUpUI(self):
    
17.         self.resize(900, 600)
    
18.         self.setWindowTitle("欢迎使用图书馆管理系统")
    
19.         self.layout = QHBoxLayout()
    
20.         self.buttonlayout = QVBoxLayout()
    
21.         self.setLayout(self.layout)
    
22. 
    
23.         font = QFont()
    
24.         font.setPixelSize(16)
    
25.         self.userManageButton = QPushButton("用户管理")
    
26.         self.addBookButton = QPushButton("添加书籍")
    
27.         self.dropBookButton = QPushButton("淘汰书籍")
    
28.         self.userManageButton.setFont(font)
    
29.         self.addBookButton.setFont(font)
    
30.         self.dropBookButton.setFont(font)
    
31.         self.userManageButton.setFixedWidth(100)
    
32.         self.userManageButton.setFixedHeight(42)
    
33.         self.addBookButton.setFixedWidth(100)
    
34.         self.addBookButton.setFixedHeight(42)
    
35.         self.dropBookButton.setFixedWidth(100)
    
36.         self.dropBookButton.setFixedHeight(42)
    
37.         self.buttonlayout.addWidget(self.addBookButton)
    
38.         self.buttonlayout.addWidget(self.dropBookButton)
    
39.         self.buttonlayout.addWidget(self.userManageButton)
    
40.         self.layout.addLayout(self.buttonlayout)
    
41.         self.storageView = BookStorageViewer()
    
42.         self.layout.addWidget(self.storageView)
    
43. 
    
44.         self.addBookButton.clicked.connect(self.addBookButtonClicked)
    
45.         self.dropBookButton.clicked.connect(self.dropBookButtonClicked)
    
46.         self.userManageButton.clicked.connect(self.userManage)
    
47. 
    
48.     def addBookButtonClicked(self):
    
49.         addDialog = addBookDialog(self)
    
50.         addDialog.add_book_success_signal.connect(self.storageView.searchButtonClicked)
    
51.         addDialog.show()
    
52.         addDialog.exec_()
    
53. 
    
54.     def dropBookButtonClicked(self):
    
55.         dropDialog = dropBookDialog(self)
    
56.         dropDialog.drop_book_successful_signal.connect(self.storageView.searchButtonClicked)
    
57.         dropDialog.show()
    
58.         dropDialog.exec_()
    
59. 
    
60.     def userManage(self):
    
61.         UserDelete = UserManage(self)
    
62.         UserDelete.show()
    
63.         UserDelete.exec_()
    
64. 
    
65. 
    
66. if __name__ == "__main__":
    
67.     app = QApplication(sys.argv)
    
68.     app.setWindowIcon(QIcon("./images/MainWindow_1.png"))
    
69.     app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
    
70.     mainMindow = AdminHome()
    
71.     mainMindow.show()
    
72.     sys.exit(app.exec_())
    

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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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