我正在嘗試構建一個基于 python 的軟件。（基于 PYQT 的軟件）問題：我的第二個窗口在打開后立即關閉。問題：我的代碼有問題嗎？我如何解決它？注意：單擊開始按鈕時會打開第二個窗口。這是我的代碼：class MainWindow(QMainWindow): switch_window=pyqtSignal(str) def __init__(self): super().__init__() self.initUI() def initUI(self): #Initialize self.setGeometry(1000, 300, 1200, 800) self.setWindowTitle('Sensorlyze') self.setWindowIcon(QIcon('biosensor.jpg')) icon = QIcon('biosensor.jpg') # Add Text l1= QLabel("Welcome to SensorLyze",self) l1.move(25, 350) # l1.setWordWrap(True) l1.setFont(QFont('Calibri',15)) l1.adjustSize() l2 = QLabel("A software to simply sensor analytics", self) l2.move(25, 400) l2.setFont(QFont('Calibri', 10)) l2.adjustSize() #Add Buttons button1 = QPushButton('Start',self) button1.resize(button1.sizeHint()) button1.clicked.connect(start_clicked) button1.move(60, 450) button2 = QPushButton('Exit', self) button2.resize(button2.sizeHint()) button2.clicked.connect(exit_clicked) button2.move(240, 450)stylesheet = """ QMainWindow { background-image: url("C:/Users/admin/Desktop/Sensorlyze/biosensor.jpg"); background-repeat: no-repeat; background-position: center; }"""# def switch(self):# self.switch_window.emit(self.line_edit.text())def start_clicked(): window=QMainWindow() window.setGeometry(300, 500, 500, 500) window.setWindowTitle('Hello') window.show() win.hide()def exit_clicked(): msgBox=QMessageBox() msgBox.setIcon(QMessageBox.Information) msgBox.setText("Are you sure you want to exit?") msgBox.setWindowTitle("Exit Sensorlyze") msgBox.setStandardButtons(QMessageBox.Ok|QMessageBox.Cancel) msgBox.buttonClicked.connect(msgButtonClick) returnValue = msgBox.exec() if returnValue==QMessageBox.Ok: exit()def msgButtonClick(i): print("Buttonclickedis:",i.text())我在這里錯過了什么嗎？任何幫助...
1 回答
千巷貓影
TA貢獻1829條經驗 獲得超7個贊
Alec 回答了這個問題，但如果您仍然不清楚，這里是更正后的代碼。
import sys
from PyQt5.QtWidgets import QMainWindow, QLabel, QPushButton, QMessageBox, QApplication
from PyQt5.QtCore import pyqtSignal, pyqtSlot
from PyQt5.QtGui import QIcon, QFont
class MainWindow(QMainWindow):
switch_window=pyqtSignal(str)
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
#Initialize
self.setGeometry(1000, 300, 1200, 800)
self.setWindowTitle('Sensorlyze')
self.setWindowIcon(QIcon('biosensor.jpg'))
icon = QIcon('biosensor.jpg')
# Add Text
l1= QLabel("Welcome to SensorLyze",self)
l1.move(25, 350)
# l1.setWordWrap(True)
l1.setFont(QFont('Calibri',15))
l1.adjustSize()
l2 = QLabel("A software to simply sensor analytics", self)
l2.move(25, 400)
l2.setFont(QFont('Calibri', 10))
l2.adjustSize()
#Add Buttons
button1 = QPushButton('Start',self)
button1.resize(button1.sizeHint())
button1.clicked.connect(self.start_clicked)
button1.move(60, 450)
button2 = QPushButton('Exit', self)
button2.resize(button2.sizeHint())
button2.clicked.connect(self.exit_clicked)
button2.move(240, 450)
def start_clicked(self):
self.window = QMainWindow()
self.window.setGeometry(300, 500, 500, 500)
self.window.setWindowTitle('Hello')
self.window.show()
# win.hide()
def exit_clicked(self):
msgBox = QMessageBox()
msgBox.setIcon(QMessageBox.Information)
msgBox.setText("Are you sure you want to exit?")
msgBox.setWindowTitle("Exit Sensorlyze")
msgBox.setStandardButtons(QMessageBox.Ok | QMessageBox.Cancel)
msgBox.buttonClicked.connect(self.msgButtonClick)
returnValue = msgBox.exec()
if returnValue == QMessageBox.Ok:
exit()
def msgButtonClick(self, i):
print("Buttonclickedis:", i.text())
stylesheet = """
QMainWindow {
background-image: url("C:/Users/admin/Desktop/Sensorlyze/biosensor.jpg");
background-repeat: no-repeat;
background-position: center;
}
"""
# def switch(self):
# self.switch_window.emit(self.line_edit.text())
def main():
app = QApplication(sys.argv)
app.setStyleSheet(stylesheet) # <---
win=MainWindow()
win.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
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