PyQt：setCentralWidget 与 QPushButton 功能冲突

Question

所以我从我的项目中推断出这个问题，我在主窗口类中注入的 Slides Widget 类中的 setCentralWidget 导致主窗口中的按钮功能（即打开一个新的 Widget 窗口）无法正常工作全部。

如果我删除 setCentralWidget 按钮可以正常工作，因此不会影响任何功能，我应该使用什么方法？我应该使用其他形式调用 Slides Widget 类吗？

一如既往地感谢任何帮助！谢谢！

from PyQt4 import QtCore, QtGui
import sys
from functools import partial


class MainWindow(QtGui.QMainWindow):
    def __init__(self, image_files, parent=None):
        super(MainWindow, self).__init__()

        self.setupUi(self)
        self.slides_widget = Slides(image_files, self)
#If you enable this down below, pushButton will not function 
#and instead the slideshow will pop up and function correctly
        #self.setCentralWidget(self.slides_widget)

    def setupUi(self, MainWindow):

        MainWindow.resize(1278, 688)
        #MainWindow.setStyleSheet(self.styledata)

        self.groupBox = QtGui.QGroupBox(MainWindow)
        self.groupBox.setGeometry(QtCore.QRect(490, 220, 120, 371))
        self.groupBox.setAlignment(QtCore.Qt.AlignHCenter|QtCore.Qt.AlignTop)
        self.groupBox.setFlat(False)
        self.groupBox.setCheckable(False)


        self.pushButton_Desc = QtGui.QPushButton(self.groupBox)
        self.pushButton_Desc.setGeometry(QtCore.QRect(20, 30, 71, 61))

        self.pushButton_Desc.clicked.connect(partial(self.DescWindow))

        self.groupBox.raise_()

        self.NewWindow = QtGui.QWidget()

    def DescWindow(self):
        self.NewWindow.show();


class Slides(QtGui.QWidget):
    def __init__(self, image_files, parent=None):
        super(Slides, self).__init__(parent)

        self.image_files = image_files
        self.label = QtGui.QLabel("", self)
        self.label.setGeometry(65, 225, 423, 363)

        #buttons to rewind and forward
        self.button = QtGui.QPushButton(". . .", self)
        self.button.setGeometry(200, 100, 140, 30)
        self.button.clicked.connect(self.timerEvent)

        self.timer = QtCore.QBasicTimer()
        self.step = 0
        self.delay = 3000 #ms

    def timerEvent(self, e=None):
        if self.step >= len(self.image_files):
            self.timer.start(self.delay, self)
            self.step = 0
            return
        self.timer.start(self.delay, self)
        file = self.image_files[self.step]
        image = QtGui.QPixmap(file)
        self.label.setPixmap(image)
        #self.setWindowTitle("{} --> {}".format(str(self.step), file))
        self.step += 1


image_files = ["images\slide1.jpg", "images\slide2.jpg", "images\slide3.jpg",
 "images\slide4.jpg", "images\slide5.jpg"]

if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    Form = MainWindow(image_files)
    Form.show()
    sys.exit(app.exec_())

Answer 1

问题的出现是因为先放置按钮，然后在上面放置了CentralWidget，解决方法是将按钮放置在CentralWidget中，即Slides中。

你必须改变：

def __init__(self, image_files, parent=None):
    super(MainWindow, self).__init__()
    self.setupUi(self)
    self.slides_widget = Slides(image_files, self)

到：

def __init__(self, image_files, parent=None):
    super(MainWindow, self).__init__()
    self.slides_widget = Slides(image_files, self)
    self.setupUi(self)

和

self.groupBox = QtGui.QGroupBox(MainWindow)

到：

self.groupBox = QtGui.QGroupBox(MainWindow.slides_widget)

完整代码：

from PyQt4 import QtCore, QtGui
import sys


class MainWindow(QtGui.QMainWindow):
    def __init__(self, image_files, parent=None):
        super(MainWindow, self).__init__()
        self.slides_widget = Slides(image_files, self)
        self.setupUi(self)

    def setupUi(self, MainWindow):

        MainWindow.resize(1278, 688)
        #MainWindow.setStyleSheet(self.styledata)

        self.groupBox = QtGui.QGroupBox(MainWindow.slides_widget)
        self.groupBox.setGeometry(QtCore.QRect(490, 220, 120, 371))
        self.groupBox.setAlignment(QtCore.Qt.AlignHCenter|QtCore.Qt.AlignTop)
        self.groupBox.setFlat(False)
        self.groupBox.setCheckable(False)


        self.pushButton_Desc = QtGui.QPushButton(self.groupBox)
        self.pushButton_Desc.setGeometry(QtCore.QRect(20, 30, 71, 61))

        self.pushButton_Desc.clicked.connect(self.DescWindow)
        self.setCentralWidget(self.slides_widget)

        self.groupBox.raise_()

        self.NewWindow = QtGui.QWidget()

    def DescWindow(self):
        self.NewWindow.show();


class Slides(QtGui.QWidget):
    def __init__(self, image_files, parent=None):
        super(Slides, self).__init__(parent)

        self.image_files = image_files
        self.label = QtGui.QLabel("", self)
        self.label.setGeometry(65, 225, 423, 363)

        #buttons to rewind and forward
        self.button = QtGui.QPushButton(". . .", self)
        self.button.setGeometry(200, 100, 140, 30)
        self.button.clicked.connect(self.timerEvent)

        self.timer = QtCore.QBasicTimer()
        self.step = 0
        self.delay = 3000 #ms

    def timerEvent(self, e=None):
        if self.step >= len(self.image_files):
            self.timer.start(self.delay, self)
            self.step = 0
            return
        self.timer.start(self.delay, self)
        file = self.image_files[self.step]
        image = QtGui.QPixmap(file)
        self.label.setPixmap(image)
        #self.setWindowTitle("{} --> {}".format(str(self.step), file))
        self.step += 1


image_files = ["images\slide1.jpg", "images\slide2.jpg", "images\slide3.jpg",
 "images\slide4.jpg", "images\slide5.jpg"]

if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    Form = MainWindow(image_files)
    Form.show()
    sys.exit(app.exec_())