python之Pyqt Gui 在循环中卡住

我正在用 PyQt 制作端口扫描器程序，但是当我激活循环时 Gui 卡住。我该如何解决这个问题？我添加了 time.sleep() 函数，但它仍然卡住。这是它卡住的功能。谢谢。

        try: 
            time.sleep(1)  
            hostname=self.adres.text() 
            hostip=socket.gethostbyname(hostname) 
            uyari1="Scanning remote host, {}\n".format(hostip) 
            self.durum.append(uyari1) 
            print(uyari1) 
            for port in range(1,1025): 
                time.sleep(0.1)   
                sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
                result = sock.connect_ex((hostip, port)) 
                if result == 0: 
                    time.sleep(0.01)  
                    print ("Port {}: \t Open".format(port)) 
                    self.durum.append("Port {}: \t Open\n".format(port)) 
                sock.close() 

完整代码:

import socket,os,time 
from PyQt4 import QtCore, QtGui 
 
try: 
    _fromUtf8 = QtCore.QString.fromUtf8 
except AttributeError: 
    def _fromUtf8(s): 
        return s 
 
try: 
    _encoding = QtGui.QApplication.UnicodeUTF8 
    def _translate(context, text, disambig): 
        return QtGui.QApplication.translate(context, text, disambig, _encoding) 
except AttributeError: 
    def _translate(context, text, disambig): 
        return QtGui.QApplication.translate(context, text, disambig) 
 
class Ui_MainWindow(object): 
    def setupUi(self, MainWindow): 
        MainWindow.setObjectName(_fromUtf8("MainWindow")) 
        MainWindow.resize(596, 412) 
        self.centralwidget = QtGui.QWidget(MainWindow) 
        self.centralwidget.setObjectName(_fromUtf8("centralwidget")) 
        self.label = QtGui.QLabel(self.centralwidget) 
        self.label.setGeometry(QtCore.QRect(120, -10, 331, 91)) 
        self.label.setObjectName(_fromUtf8("label")) 
        self.label_2 = QtGui.QLabel(self.centralwidget) 
        self.label_2.setGeometry(QtCore.QRect(10, 90, 91, 16)) 
        self.label_2.setObjectName(_fromUtf8("label_2")) 
        self.adres = QtGui.QLineEdit(self.centralwidget) 
        self.adres.setGeometry(QtCore.QRect(100, 90, 371, 22)) 
        self.adres.setObjectName(_fromUtf8("adres")) 
        self.durum = QtGui.QTextEdit(self.centralwidget) 
        self.durum.setGeometry(QtCore.QRect(10, 140, 571, 191)) 
        self.durum.setObjectName(_fromUtf8("durum")) 
        self.baslat = QtGui.QPushButton(self.centralwidget) 
        self.baslat.setGeometry(QtCore.QRect(480, 90, 101, 21)) 
        self.baslat.setObjectName(_fromUtf8("baslat")) 
        self.dosyaya = QtGui.QPushButton(self.centralwidget) 
        self.dosyaya.setGeometry(QtCore.QRect(490, 340, 91, 25)) 
        self.dosyaya.setObjectName(_fromUtf8("dosyaya")) 
        MainWindow.setCentralWidget(self.centralwidget) 
        self.menubar = QtGui.QMenuBar(MainWindow) 
        self.menubar.setGeometry(QtCore.QRect(0, 0, 596, 21)) 
        self.menubar.setObjectName(_fromUtf8("menubar")) 
        MainWindow.setMenuBar(self.menubar) 
        self.hakkindaa = QtGui.QPushButton(self.centralwidget) 
        self.hakkindaa.setGeometry(QtCore.QRect(10, 340, 91, 25)) 
        self.hakkindaa.setObjectName(_fromUtf8("hakkindaa")) 
        self.hakkindaa.setText("Hakkında") 
        self.statusbar = QtGui.QStatusBar(MainWindow) 
        self.statusbar.setObjectName(_fromUtf8("statusbar")) 
        MainWindow.setStatusBar(self.statusbar) 
        QtCore.QObject.connect(self.hakkindaa, QtCore.SIGNAL(_fromUtf8("clicked()")), self.hakkinda) 
        QtCore.QObject.connect(self.dosyaya, QtCore.SIGNAL(_fromUtf8("clicked()")), self.dosyayaya) 
        QtCore.QObject.connect(self.baslat, QtCore.SIGNAL(_fromUtf8("clicked()")), self.baslat_btn) 
        self.retranslateUi(MainWindow) 
        QtCore.QMetaObject.connectSlotsByName(MainWindow) 
 
    def hakkinda(self): 
        QtGui.QMessageBox.about(None, "About", "Ege Öz 2014") 
 
    def baslat_btn(self): 
        try: 
            time.sleep(1)  
            hostname=self.adres.text() 
            hostip=socket.gethostbyname(hostname) 
            uyari1="Scanning remote host, {}\n".format(hostip) 
            self.durum.append(uyari1) 
            print(uyari1) 
            for port in range(1,1025): 
                time.sleep(0.1)   
                sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
                result = sock.connect_ex((hostip, port)) 
                if result == 0: 
                    time.sleep(0.01)  
                    print ("Port {}: \t Open".format(port)) 
                    self.durum.append("Port {}: \t Open\n".format(port)) 
                sock.close() 
 
        except socket.gaierror: 
            self.durum.append("Hostname could not be resolved.") 
            print("Hostname could not be resolved.") 
            self.adres.setText("") 
        except socket.error: 
 
            self.durum.append("Could not connect to server.") 
            print("Could not connect to server.") 
            self.adres.setText("") 
    def dosyayaya(self): 
            self.durum.append("Saving log file to home directory...") 
            ev=os.getenv("USER") 
            data=self.durum.toPlainText() 
            yol="/home/"+ev+"/portscanner.log" 
            f = open (yol,"w") 
            f.write(data) 
            f.close() 
            self.durum.append("Log file saved.") 
            print ("Log file saved.") 
    def retranslateUi(self, MainWindow): 
        MainWindow.setWindowTitle(_translate("MainWindow", "Port Scanner", None)) 
        self.label.setText(_translate("MainWindow", "<html><head/><body><p align=\"center\"><span style=\" font-size:11pt; font-weight:600;\">Port Scanner</span></p><p>Enter the remote host adress and press start.</p></body></html>", None)) 
        self.label_2.setText(_translate("MainWindow", "Remote Host:", None)) 
        self.baslat.setText(_translate("MainWindow", "Start Scanning", None)) 
        self.dosyaya.setText(_translate("MainWindow", "Save to file", None))     
 
if __name__ == "__main__": 
    import sys 
    app = QtGui.QApplication(sys.argv) 
    MainWindow = QtGui.QMainWindow() 
    ui = Ui_MainWindow() 
    ui.setupUi(MainWindow) 
    MainWindow.show() 
    sys.exit(app.exec_()) 

请您参考如下方法:

您应该在 for 循环中调用 QtCore.QCoreApplication.processEvents() 以使 Qt 的事件循环处理传入事件(来自键盘或鼠标)。