我有一個腳本,它有一個登錄屏幕,如果按下取消按鈕,我想完全退出應用程序。我已經嘗試了3種方式:正確的方法來退出/退出PyQt程序
- sys.exit()
- QApplication.quit()
- QCoreApplication.instance()退出()
只有1個作品。另外兩個使對話框變成白色,然後閃爍然後掛起,我甚至不能切換到其他應用程序。我的代碼如下:
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtSql import *
from PyQt5.QtWidgets import *
import csv
import sys
from datetime import datetime, timedelta, time
import os
from ci_co_table import *
from login import *
class Ci_Co(QMainWindow):
"""Check in and check out module"""
def __init__(self, parent=None):
QWidget.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
class Login(QDialog):
"""User login """
def __init__(self):
QDialog.__init__(self)
self.ui = Ui_login_form()
self.ui.setupUi(self)
self.ui.buttonBox.accepted.connect(lambda: self.handle_login(servers=servers))
servers = {}
with open('servers.csv', newline='') as csvfile:
server_reader = csv.reader(csvfile)
for row in server_reader:
self.ui.cbo_db_name.addItem(row[1])
servers[row[1]] = (row[0],row[2])
def handle_login(self, servers=''):
global user
global pword
global database
global server
global bg_colour
user = self.ui.username.text()
pword = self.ui.password.text()
database = self.ui.cbo_db_name.currentText()
server = servers[database][0]
bg_colour = servers[database][1]
if __name__=="__main__":
app=QApplication(sys.argv)
global hotdate
global hotdate_string
global folio_num
global user
global pword
global dbase
global server
pword = ""
global database
global bg_colour
#Login
while True:
if Login().exec_() == QDialog.Accepted:
db = QSqlDatabase.addDatabase("QPSQL");
db.setHostName(server)
db.setDatabaseName(database);
db.setUserName(user);
db.setPassword(pword)
if (db.open()==False):
QMessageBox.critical(None, "Database Error", db.lastError().text())
else:
break
else:
#QApplication.quit()
QCoreApplication.instance().quit()
#sys.exit()
myapp = Ci_Co()
myapp.show()
sys.exit(app.exec_())
你對使用app.quit()絕對正確。但是,它給了我在Windows 10上的對話框相同的凍結。我運行Linux Mint上的程序,它凍結了GUI,但我能夠登錄到終端,發現CPU是100%,所以它似乎處於某種循環。所以,app..quit()沒有任何不同。 – Dkellygb
我看到你的第二點,並將在下次重構時考慮它。 – Dkellygb