请教在pyqt5里面为何一点击按钮进行响应进程就自动结束没有报错？

[CoolMin_KonMin]

代码如下：

#!/usr/bin/python
# -*- coding:utf-8 -*-

'''os.environ['NLS_LANG'] = 'SIMPLIFIED CHINESE_CHINA.UTF8'
user_agent = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0"
headers = {'User-Agent': user_agent}
start_urls = 'http://tieba.baidu.com/f/search/res?ie=utf-8'

kw = 'eng'

url = start_urls + kw
request=urllib.request.Request(url,headers=headers)
reponse=urllib.request.urlopen(request).read()
print(reponse)
'''

#!/usr/bin/env python
# -*- coding :gb2312 -*-
import urllib.request
import urllib.parse
import sys
from urllib.request import urlopen
from bs4 import BeautifulSoup
import time
import tiebaUI
class TieBa():

    def __init__(self):
        app = tiebaUI.QtWidgets.QApplication(sys.argv)
        MainWindow = tiebaUI.QtWidgets.QMainWindow()
        MainWindow.show()
        self.ui = tiebaUI.Ui_MainWindow()
        self.ui.setupUi(MainWindow)
        self.ui.pushButton.clicked.connect(TieBa.start)
        self.kw = "222"
        self.kw2 = "333"
        self.beginPage = endPage = 0
        self.kw_url = "http://tieba.baidu.com/f?"
        self.kw2_url = "http://tieba.baidu.com"
        self.ui.textEdit.setText('不需要带“吧”字')
        sys.exit(app.exec_())


    def writeAl(self,all_nr_print):
        # now = time.strftime("%Y%m%d%H%M%S", time.localtime(time.time()))
        # now = time.strftime("%Y%m%d%H", time.localtime(time.time()))
        # fname = (kw + "吧_" + kw2 + now + r".txt")
        '''
        fname = (self.kw + "吧_P" + str(self.beginPage) + "-P" + str(self.endPage) + "_" + self.kw2 + r".txt")
        with open(fname, 'a') as f:
            f.write(all_nr_print+"\n")
        '''


    def all_nr(self,full_url):
        html = urlopen(full_url)
        bsObj = BeautifulSoup(html, 'html.parser')
        t1 = bsObj.find_all('a')
        for t2 in t1:
            t3 = str(t2.get('href'))
            t31 = str(t2.get('title'))
            if len(t3) == 13:
                if self.kw2 in t31:
                    all_nr_print = t31 + " " + str(self.kw2_url) + str(t3)
                    print(all_nr_print)
                    self.writeAl(all_nr_print)


    def tiebaSpider(self,kw_url, beginPage, endPage):
        for page in range(beginPage, endPage + 1):
            pn = (page - 1) * 50
            full_url = kw_url + "&pn=" + str(pn)
            #print("\n%s"% full_url)
            self.all_nr(full_url)
            # writeAl(full_url)

    def start(self):
        print('111')
        self.kw = '222'
        print(self.kw)
问题在这里，点击按钮之后能正常输出111，但是后面就自动退出了，这个令self.kw = 222也是用来测试的，其实是如下被注释的代码，想获取文本框内容然后赋值给kw。但是臣妾做不到啊，求大佬指教一下，自己真的解决不来了，只能来发帖了.....



       # self.kw2 = ui.textEdit.toPlainText()
       # self.beginPage = ui.textEdit_3.toPlainText()
       # self.endPage = ui.textEdit_4.toPlainText()
       # print('222')
       # kw_key = urllib.parse.urlencode({"kw": self.kw})
       # full_url = self.kw_url + kw_key
       # self.tiebaSpider(full_url, self.beginPage, self.endPage)

        #print(self.kw,self.kw2,self.beginPage,self.endPage)
        '''
        kw = input('请输入贴吧名：')
        beginPage = int(input("请输入起始页："))
        endPage = int(input("请输入结束页："))
        kw2 = input('请输入帖子主题的\"关键词\"：')
        kw_url = "http://tieba.baidu.com/f?"
        kw2_url = "http://tieba.baidu.com"
        kw_key = urllib.parse.urlencode({"kw": kw})
        full_url = kw_url + kw_key
        tiebaSpider(full_url, beginPage, endPage)
        
        '''

if __name__ == '__main__':
    TieBa()

刚开始学pyqt5做爬虫界面，可能有些代码写的很奇怪，主要是一直在该描述的错误，到后面改得很乱了。另外我是引用的ui文件，然后逻辑是在上面这个py文件里面实现的，没有问题吧。

ui.py的代码如下：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'tiebaUI.ui'
#
# Created by: PyQt5 UI code generator 5.11.3
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QHeaderView


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1000, 450)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(MainWindow.sizePolicy().hasHeightForWidth())
        MainWindow.setSizePolicy(sizePolicy)
        MainWindow.setMinimumSize(QtCore.QSize(1000, 450))
        MainWindow.setMaximumSize(QtCore.QSize(1000, 450))
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(10, 10, 81, 31))
        self.label.setTextFormat(QtCore.Qt.AutoText)
        self.label.setAlignment(QtCore.Qt.AlignCenter)
        self.label.setObjectName("label")
        self.textEdit = QtWidgets.QTextEdit(self.centralwidget)
        self.textEdit.setGeometry(QtCore.QRect(100, 10, 150, 31))
        self.textEdit.setObjectName("textEdit")
        self.label_2 = QtWidgets.QLabel(self.centralwidget)
        self.label_2.setGeometry(QtCore.QRect(280, 10, 81, 31))
        self.label_2.setTextFormat(QtCore.Qt.AutoText)
        self.label_2.setAlignment(QtCore.Qt.AlignCenter)
        self.label_2.setObjectName("label_2")
        self.textEdit_2 = QtWidgets.QTextEdit(self.centralwidget)
        self.textEdit_2.setGeometry(QtCore.QRect(370, 10, 150, 31))
        self.textEdit_2.setObjectName("textEdit_2")
        self.label_3 = QtWidgets.QLabel(self.centralwidget)
        self.label_3.setGeometry(QtCore.QRect(580, 10, 81, 31))
        self.label_3.setTextFormat(QtCore.Qt.AutoText)
        self.label_3.setAlignment(QtCore.Qt.AlignCenter)
        self.label_3.setObjectName("label_3")
        self.textEdit_3 = QtWidgets.QTextEdit(self.centralwidget)
        self.textEdit_3.setGeometry(QtCore.QRect(670, 10, 71, 31))
        self.textEdit_3.setObjectName("textEdit_3")
        self.textEdit_4 = QtWidgets.QTextEdit(self.centralwidget)
        self.textEdit_4.setGeometry(QtCore.QRect(860, 10, 71, 31))
        self.textEdit_4.setObjectName("textEdit_4")
        self.label_4 = QtWidgets.QLabel(self.centralwidget)
        self.label_4.setGeometry(QtCore.QRect(770, 10, 81, 31))
        self.label_4.setTextFormat(QtCore.Qt.AutoText)
        self.label_4.setAlignment(QtCore.Qt.AlignCenter)
        self.label_4.setObjectName("label_4")
        self.tableWidget = QtWidgets.QTableWidget(self.centralwidget)
        self.tableWidget.setGeometry(QtCore.QRect(10, 140, 981, 271))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.tableWidget.sizePolicy().hasHeightForWidth())
        self.tableWidget.setSizePolicy(sizePolicy)
        self.tableWidget.setMidLineWidth(1)
        self.tableWidget.setSizeAdjustPolicy(QtWidgets.QAbstractScrollArea.AdjustToContents)
        self.tableWidget.setAutoScroll(True)
        self.tableWidget.setTabKeyNavigation(True)
        self.tableWidget.setVerticalScrollMode(QtWidgets.QAbstractItemView.ScrollPerItem)
        self.tableWidget.setColumnCount(3)
        self.tableWidget.setObjectName("tableWidget")
        self.tableWidget.setRowCount(0)
        self.tableWidget.horizontalHeader().setSectionResizeMode(QHeaderView.Interactive)
        item = QtWidgets.QTableWidgetItem()
        item.setTextAlignment(QtCore.Qt.AlignCenter)
        self.tableWidget.setHorizontalHeaderItem(0, item)
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(860, 70, 121, 61))
        self.pushButton.setObjectName("pushButton")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(320, 80, 521, 41))
        self.lineEdit.setObjectName("lineEdit")
        self.label_5 = QtWidgets.QLabel(self.centralwidget)
        self.label_5.setGeometry(QtCore.QRect(240, 80, 71, 41))
        self.label_5.setObjectName("label_5")
        self.label_6 = QtWidgets.QLabel(self.centralwidget)
        self.label_6.setGeometry(QtCore.QRect(20, 70, 141, 21))
        self.label_6.setObjectName("label_6")
        self.label_7 = QtWidgets.QLabel(self.centralwidget)
        self.label_7.setGeometry(QtCore.QRect(20, 100, 141, 21))
        self.label_7.setObjectName("label_7")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 1000, 26))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "贴吧关键词帖子筛选工具"))
        self.label.setText(_translate("MainWindow", "吧名："))
        self.label_2.setText(_translate("MainWindow", "关键字："))
        self.label_3.setText(_translate("MainWindow", "起始页："))
        self.label_4.setText(_translate("MainWindow", "结束页："))
        self.tableWidget.setHorizontalHeaderLabels(['贴名','地址','时间'])
        self.pushButton.setText(_translate("MainWindow", "开始"))
        self.label_5.setText(_translate("MainWindow", "当前状态："))
        self.label_6.setText(_translate("MainWindow", "作者：KONMIN"))
        self.label_7.setText(_translate("MainWindow", "版本：v0.0.1"))

[CoolMin_KonMin]

刚开始学pyqt5，做第一个爬虫界面....求指导哇~~~能这么引用ui.py然后实现逻辑的吧?

[包子789654]

楼主问题解决了吗，我也遇到过了，PyQt5点击事件按钮一会没有反应就自动结束了，也不报错。
后来找了好久才发现一个单词拼错了。
不知道什么原因，求大神支招

[狼独舞]

遇到完全一样的问题了，网上真没有这个案例，同样的引用UI文件，同样的内置信号，自定义槽函数，同样的想在槽函数里干点自定义的事，同样的点击按钮就自动结束程序了，同样的没有任何错误提示。 求解。

[写代码的资资]

同样问题暴风哭泣

[fresh_nam]

TieBa类中的 self.ui.pushButton.clicked.connect(TieBa.start)应该是self.ui.pushButton.clicked.connect(self.start)吧

[ntwison2]

和我一样的问题

[menwenliang0]

我找到原因了，我加了打印。就是方法不对导致程序退出了，获取文本信息的方法QtWidgets.QTextEdit 对应获取文本的方式为self.textEdit.toPlainText()。而QtWidgets.QLineEdit() 对应的self.text.text()

[menwenliang0]

我的是获取文本方法用错了，你们的应该也是这个原因，当然和我错的方法可能不一样，建议加打印，看挂在哪一行。再对应查方法