Question

我正在使用PyQt和按钮进行简单的基于文本的冒险。出于某种原因，在单击几个按钮后，在刷新屏幕之前单击按钮时会出现一些可怕的延迟。为什么会这样？由于我没有想法是什么导致了这个问题，我将复制整个~100行程序......

import sys, time
from PyQt4 import QtGui, QtCore

class Window(QtGui.QMainWindow):

    def __init__(self):
        super(Window, self).__init__()
        self.setGeometry(50, 50, 600, 400)
        self.setWindowTitle("Omar OK Adventures!")

        QtGui.QApplication.setStyle(QtGui.QStyleFactory.create("plastique"))

        self.home()

    def home(self):
        btn1 = QtGui.QPushButton("New Game", self)
        btn1.clicked.connect(self.change)
        btn1.resize(500, 25)
        btn1.move(50, 275)
        self.btn1 = btn1

        btn2 = QtGui.QPushButton("What's this all about?", self)
        btn2.clicked.connect(self.wat)
        btn2.resize(500, 25)
        btn2.move(50, 305)
        self.btn2 = btn2

        btn3 = QtGui.QPushButton("...", self)
        btn3.resize(500, 25)
        btn3.move(50, -200)
        self.btn3 = btn3

        btn4 = QtGui.QPushButton("...", self)
        btn4.resize(500, 25)
        btn4.move(50, -200)
        self.btn4 = btn4

        txt = "Welcome to the main menu! (WIP obviously)"
        lbl = QtGui.QLabel(txt, self)
        lbl.resize(500, 200)
        lbl.move(50, 25)
        lbl.setAlignment(QtCore.Qt.AlignCenter)
        self.lbl = lbl
        self.show()

    def homefake(self):
        self.btn1.setText("Begin teh epic adventures")
        self.btn1.clicked.connect(self.change)
        self.btn2.setText("What's this all about?")
        self.btn2.clicked.connect(self.wat)
        self.btn2.move(50,305)
        self.btn3.move(50, -200)
        self.btn4.move(50, -200)
        self.lbl.setText("Welcome to the main menu! (WIP obviously)")

    def close_application(self):
        choice = QtGui.QMessageBox.question(self, "Gemme outta here!",
                                            "Do you really want to quit?",
                                            QtGui.QMessageBox.Yes | QtGui.QMessageBox.No)
        if choice == QtGui.QMessageBox.Yes:
            sys.exit()
        else:
            pass

    def closeEvent(self, event):
        event.ignore()
        self.close_application()

    def C1_1(self):
        self.lbl.setText("You tell your parents that you're going to Japan to get some 'stuff'\nThey tell you to be back at dinner\nOk.\nYou buy a plane ticket and board the plane\nYou realize boarding the plane is boring as hell.\nWhat should you do to kill time?")
        self.btn1.setText("Take over the plane (Try not to crash it horribly)")
        self.btn1.clicked.connect(self.C2_1)
        self.btn2.setText("Watch a movie on the not-tablet stuck on a chair infront of you (Really, it's a tablet stuck on a chair.)")
        self.btn2.move(50, 305)
        self.btn2.clicked.connect(self.C2_2)
        self.btn3.move(50, -200)
        self.btn4.move(50, -200)

    def C2_1(self):
        self.btn1.setText("Restart game")
        self.btn1.clicked.connect(self.homefake)
        self.btn2.move(50, -200)
        self.lbl.setText("You pull out your combat shotgun and tell everyone to freeze and go on the floor.\nNeedless to say, people are screaming.\nSome guy tried to tackle you\nYou shot him\nSome air police jackass lands a headshot on you while you were looking away\nYou died.\n\nGood job.")

    def C2_2(self):
        self.lbl.setText('lol')

    def C1_2(self):
        self.lbl.setText("ARMED MEN")

    def C1_3(self):
        self.lbl.setText("TAKIN A HIKE")

    def C1_4(self):
        self.lbl.setText("HORSE TIME")

    def wat(self):
        self.lbl.setText("What's this?\nThis is pretty much a 5 minute (or so) test to see the capabilities of text based adventures.\n I'll probably be doing stuff much better later on. Keep an eye out!\nI probably won't replace this even if it's a joke program. Just because.\n\nCreated by popcar2")
        self.btn1.setText("Back to main menu")
        self.btn2.move(50, -200)
        self.btn1.clicked.connect(self.homefake)

    def change(self, txt):
        self.lbl.setText("You're sitting at home, incredibly bored as usual.\nHowever... You decided to do something new in your okeil life...\nA few ideas pop up in your head, what do you wanna do?")
        self.btn1.setText("Go steal whatever's nuclear in one of Japan's nuclear power plants (Diseases might be included)")
        self.btn2.move(50, 305)
        self.btn2.setText("Hire a group of armed men and take over the school (Be sure to tie kids as hostages)")
        self.btn3.move(50, 335)
        self.btn3.setText("Take a walk (TAKE A HIKE, MATE)")
        self.btn4.move(50, 365)
        self.btn4.setText("Steal a horse (The only logical option)")
        self.btn1.clicked.connect(self.C1_1)
        self.btn2.clicked.connect(self.C1_2)
        self.btn3.clicked.connect(self.C1_3)
        self.btn4.clicked.connect(self.C1_4)
def run():
    app = QtGui.QApplication(sys.argv)
    GUI = Window()
    sys.exit(app.exec_())
run()

Answer 1

进行信号连接（btnX.clicked.connect()）时，这不会自动断开先前连接的插槽。因此，当您在游戏中前进时，每次点击按钮实际上都会执行已连接到它的每个方法，随着越来越多的方法连接到每个按钮的点击信号，这些方法开始越来越慢。

在与btnX.clicked.connect(new_slot)建立新连接之前，您需要致电btnX.clicked.disconnect(previous_slot)。

当您连接下一个方法时，这需要您知道先前连接了哪个插槽（因为您需要参考方法名称）。我没有按照你的程序的逻辑来看看它是多么容易，但这是你需要做的。否则，您将需要采用不同的方法，不需要更改按钮所连接的插槽（例如，使用堆叠小部件在不同的按钮组之间切换，或类似）

按下几个按钮后，为什么我的应用程序会滞后？

1 个答案: