使用 PyQt4 空白 window
Blank window using PyQt4
我的程序目前有问题，当我 运行 程序时，将显示空白 window。
它将以我设置的标题显示。但是，标签、行编辑和按钮无法显示。我是 PYQT4 和 OOP 的新手，所以我不太确定我是否使用了正确的 class 或者即使我需要为每个设置 object 名称项目。
import sys
from PyQt4 import QtCore, QtGui
import mysql.connector
class RegisterPage(QtGui.QMainWindow):
def __init__(self):
super(RegisterPage, self).__init__()
self.setupUi()
self.setGeometry(0,0,640,480)
self.setWindowTitle("Register")
def setupUi(self):
#this part of the code is for the title of the of the register page
pg4titleLbl = QtGui.QLabel()
pg4titleLbl.setGeometry(QtCore.QRect(250, 50, 150, 40))
font = QtGui.QFont()
font.setPointSize(26)
font.setBold(True)
font.setWeight(75)
pg4titleLbl.setFont(font)
pg4titleLbl.setObjectName("pg4titleLbl")
pg4titleLbl.setText("Register")
#this part of the code is the button to take the user back to the homepage
HomePageLink = QtGui.QPushButton()
HomePageLink.setGeometry(QtCore.QRect(0, 170, 60, 120))
HomePageLink.setObjectName("HomePageLink")
HomePageLink.setText("Home")
#this part of the code is to let the users know they need to enter a username
enterUsernameLbl = QtGui.QLabel()
enterUsernameLbl.setGeometry(QtCore.QRect(90, 130, 190, 40))
font = QtGui.QFont()
font.setPointSize(16)
enterUsernameLbl.setFont(font)
enterUsernameLbl.setObjectName("enterUsernameLbl")
enterUsernameLbl.setText("Choose a username:")
#this part of the code is there so the user can input their username they want to create
usernameInput = QtGui.QLineEdit()
usernameInput.setGeometry(QtCore.QRect(290, 140, 260, 30))
usernameInput.setObjectName("UsernameInput")
#this part of the code is to let the user know that they need to enter an email
createEmailLbl = QtGui.QLabel()
createEmailLbl.setGeometry(QtCore.QRect(130, 180, 160, 40))
font = QtGui.QFont()
font.setPointSize(16)
createEmailLbl.setFont(font)
createEmailLbl.setObjectName("createEmailLbl")
createEmailLbl.setText("Create an Email:")
#this part of the code is there so the user can input their email they want to use
createEmailInput = QtGui.QLineEdit()
createEmailInput.setGeometry(QtCore.QRect(290, 190, 260, 30))
createEmailInput.setObjectName("createEmailInput")
#this part of the code is to let the user know that they need to make a password
createPaswordLbl = QtGui.QLabel()
createPaswordLbl.setGeometry(QtCore.QRect(100, 230, 200, 40))
font = QtGui.QFont()
font.setPointSize(16)
createPaswordLbl.setFont(font)
createPaswordLbl.setObjectName("createPaswordLbl")
createPaswordLbl.setText("Choose a Password:")
#this part of the code is there so the user can input the password they want to create
createPasswordInput = QtGui.QLineEdit()
createPasswordInput.setGeometry(QtCore.QRect(290, 240, 260, 30))
createPasswordInput.setObjectName("createPasswordInput")
#this part of the of the code is to let the user know that they need to re-enter the password they just created
confirmPasswordLbl = QtGui.QLabel()
confirmPasswordLbl.setGeometry(QtCore.QRect(110, 280, 200, 40))
font = QtGui.QFont()
font.setPointSize(16)
confirmPasswordLbl.setFont(font)
confirmPasswordLbl.setObjectName("confirmPasswordLbl")
confirmPasswordLbl.setText("Confirm password:")
#this part of the code is there so the user can re-enter the password they just create
confirmPasswordInput = QtGui.QLineEdit()
confirmPasswordInput.setGeometry(QtCore.QRect(290, 290, 260, 30))
confirmPasswordInput.setObjectName("confirmPasswordInput")
#this button is used so the user can input there data into the system
registerButton = QtGui.QPushButton()
registerButton.setGeometry(QtCore.QRect(260, 350, 110, 30))
registerButton.setObjectName("registerButton")
registerButton.setText("Register")
def register():
if createPasswordInput.text()==confirmPasswordInput.text():
password=confirmPasswordInput.text()
else:
msg = QtGui.QMessageBox.information(self, 'Message', 'Inputted passwords are not the same', QtGui.QMessageBox.Ok)
email=createEmailInput.text()
username=usernameInput.text()
if password=="" or email=="" or username=="":
msg = QtGui.QMessageBox.information(self, 'Message', 'please fill in all boxes', QtGui.QMessageBox.Ok)
else:
cnx = mysql.connector.connect(user='scott', password='password',host='127.0.0.1',database='employees')
add_user = ("INSERT INTO draughtsUsers "
"(username, passsword, email) "
"VALUES (%s, %s, %s)")
cursor=cnx.cursor()
userData=(username,password,email)
cursor.execute(add_user, userData)
userId= cursor.lastrowid
cnx.commit()
cursor.close()
cnx.close()
#this button will take the user back to the login page if they already have an account
loginPageLink = QtGui.QPushButton()
loginPageLink.setGeometry(QtCore.QRect(390, 420, 240, 30))
loginPageLink.setStyleSheet("QPushButton { border: 0px;\n} QPushButton:hover {color:rgb(0,0,225);}")
loginPageLink.setObjectName("loginPageLink")
loginPageLink.setText("If you already have an account, login here")
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
window = RegisterPage()
window.show()
sys.exit(app.exec_())
不是顶层的小部件的位置是相对于您的父级的，但是在您的情况下 none 有一个父级，解决方案是将 self 作为父级传递给他.
def setupUi(self):
pg4titleLbl = QtGui.QLabel(self)
[...]
HomePageLink = QtGui.QPushButton(self)
[...]
enterUsernameLbl = QtGui.QLabel(self)
[...]
usernameInput = QtGui.QLineEdit(self)
[...]
createEmailLbl = QtGui.QLabel(self)
[...]
createEmailInput = QtGui.QLineEdit(self)
[...]
createPaswordLbl = QtGui.QLabel(self)
[...]
createPasswordInput = QtGui.QLineEdit(self)
[...]
confirmPasswordLbl = QtGui.QLabel(self)
[...]
confirmPasswordInput = QtGui.QLineEdit(self)
[...]
registerButton = QtGui.QPushButton(self)
[...]
我的程序目前有问题，当我 运行 程序时，将显示空白 window。
它将以我设置的标题显示。但是，标签、行编辑和按钮无法显示。我是 PYQT4 和 OOP 的新手，所以我不太确定我是否使用了正确的 class 或者即使我需要为每个设置 object 名称项目。
import sys
from PyQt4 import QtCore, QtGui
import mysql.connector
class RegisterPage(QtGui.QMainWindow):
def __init__(self):
super(RegisterPage, self).__init__()
self.setupUi()
self.setGeometry(0,0,640,480)
self.setWindowTitle("Register")
def setupUi(self):
#this part of the code is for the title of the of the register page
pg4titleLbl = QtGui.QLabel()
pg4titleLbl.setGeometry(QtCore.QRect(250, 50, 150, 40))
font = QtGui.QFont()
font.setPointSize(26)
font.setBold(True)
font.setWeight(75)
pg4titleLbl.setFont(font)
pg4titleLbl.setObjectName("pg4titleLbl")
pg4titleLbl.setText("Register")
#this part of the code is the button to take the user back to the homepage
HomePageLink = QtGui.QPushButton()
HomePageLink.setGeometry(QtCore.QRect(0, 170, 60, 120))
HomePageLink.setObjectName("HomePageLink")
HomePageLink.setText("Home")
#this part of the code is to let the users know they need to enter a username
enterUsernameLbl = QtGui.QLabel()
enterUsernameLbl.setGeometry(QtCore.QRect(90, 130, 190, 40))
font = QtGui.QFont()
font.setPointSize(16)
enterUsernameLbl.setFont(font)
enterUsernameLbl.setObjectName("enterUsernameLbl")
enterUsernameLbl.setText("Choose a username:")
#this part of the code is there so the user can input their username they want to create
usernameInput = QtGui.QLineEdit()
usernameInput.setGeometry(QtCore.QRect(290, 140, 260, 30))
usernameInput.setObjectName("UsernameInput")
#this part of the code is to let the user know that they need to enter an email
createEmailLbl = QtGui.QLabel()
createEmailLbl.setGeometry(QtCore.QRect(130, 180, 160, 40))
font = QtGui.QFont()
font.setPointSize(16)
createEmailLbl.setFont(font)
createEmailLbl.setObjectName("createEmailLbl")
createEmailLbl.setText("Create an Email:")
#this part of the code is there so the user can input their email they want to use
createEmailInput = QtGui.QLineEdit()
createEmailInput.setGeometry(QtCore.QRect(290, 190, 260, 30))
createEmailInput.setObjectName("createEmailInput")
#this part of the code is to let the user know that they need to make a password
createPaswordLbl = QtGui.QLabel()
createPaswordLbl.setGeometry(QtCore.QRect(100, 230, 200, 40))
font = QtGui.QFont()
font.setPointSize(16)
createPaswordLbl.setFont(font)
createPaswordLbl.setObjectName("createPaswordLbl")
createPaswordLbl.setText("Choose a Password:")
#this part of the code is there so the user can input the password they want to create
createPasswordInput = QtGui.QLineEdit()
createPasswordInput.setGeometry(QtCore.QRect(290, 240, 260, 30))
createPasswordInput.setObjectName("createPasswordInput")
#this part of the of the code is to let the user know that they need to re-enter the password they just created
confirmPasswordLbl = QtGui.QLabel()
confirmPasswordLbl.setGeometry(QtCore.QRect(110, 280, 200, 40))
font = QtGui.QFont()
font.setPointSize(16)
confirmPasswordLbl.setFont(font)
confirmPasswordLbl.setObjectName("confirmPasswordLbl")
confirmPasswordLbl.setText("Confirm password:")
#this part of the code is there so the user can re-enter the password they just create
confirmPasswordInput = QtGui.QLineEdit()
confirmPasswordInput.setGeometry(QtCore.QRect(290, 290, 260, 30))
confirmPasswordInput.setObjectName("confirmPasswordInput")
#this button is used so the user can input there data into the system
registerButton = QtGui.QPushButton()
registerButton.setGeometry(QtCore.QRect(260, 350, 110, 30))
registerButton.setObjectName("registerButton")
registerButton.setText("Register")
def register():
if createPasswordInput.text()==confirmPasswordInput.text():
password=confirmPasswordInput.text()
else:
msg = QtGui.QMessageBox.information(self, 'Message', 'Inputted passwords are not the same', QtGui.QMessageBox.Ok)
email=createEmailInput.text()
username=usernameInput.text()
if password=="" or email=="" or username=="":
msg = QtGui.QMessageBox.information(self, 'Message', 'please fill in all boxes', QtGui.QMessageBox.Ok)
else:
cnx = mysql.connector.connect(user='scott', password='password',host='127.0.0.1',database='employees')
add_user = ("INSERT INTO draughtsUsers "
"(username, passsword, email) "
"VALUES (%s, %s, %s)")
cursor=cnx.cursor()
userData=(username,password,email)
cursor.execute(add_user, userData)
userId= cursor.lastrowid
cnx.commit()
cursor.close()
cnx.close()
#this button will take the user back to the login page if they already have an account
loginPageLink = QtGui.QPushButton()
loginPageLink.setGeometry(QtCore.QRect(390, 420, 240, 30))
loginPageLink.setStyleSheet("QPushButton { border: 0px;\n} QPushButton:hover {color:rgb(0,0,225);}")
loginPageLink.setObjectName("loginPageLink")
loginPageLink.setText("If you already have an account, login here")
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
window = RegisterPage()
window.show()
sys.exit(app.exec_())
不是顶层的小部件的位置是相对于您的父级的，但是在您的情况下 none 有一个父级，解决方案是将 self 作为父级传递给他.
def setupUi(self):
pg4titleLbl = QtGui.QLabel(self)
[...]
HomePageLink = QtGui.QPushButton(self)
[...]
enterUsernameLbl = QtGui.QLabel(self)
[...]
usernameInput = QtGui.QLineEdit(self)
[...]
createEmailLbl = QtGui.QLabel(self)
[...]
createEmailInput = QtGui.QLineEdit(self)
[...]
createPaswordLbl = QtGui.QLabel(self)
[...]
createPasswordInput = QtGui.QLineEdit(self)
[...]
confirmPasswordLbl = QtGui.QLabel(self)
[...]
confirmPasswordInput = QtGui.QLineEdit(self)
[...]
registerButton = QtGui.QPushButton(self)
[...]