问PyQt4 QStackedLayout交换布局错误
EN

Stack Overflow用户

提问于 2016-01-12 13:28:58

回答 2查看 570关注 0票数 0

我正在尝试让按钮在我用PyQt4制作的用户界面上工作。窗口会更改，但在我得到错误NameError之前，按钮只能工作一次:名称“UI2Window”未定义为。我不明白为什么我得到这个错误，因为代码工作良好的第一次。

帮助解决这个问题/找到一个更好的方式来切换布局是值得赞赏的。

下面是我的代码的简化版本。

UI1.py的代码：

import sys
from PyQt4.QtCore import*
from PyQt4.QtGui import *
from UI2 import *

class UI1Window(QMainWindow):
    def __init__(self):
        super().__init__()
        self.Widget = self.CreateMainLayout()
        self.StackedLayout = QStackedLayout()
        self.StackedLayout.addWidget(self.Widget)
        self.MainWidget = QWidget()
        self.MainWidget.setLayout(self.StackedLayout)
        self.setCentralWidget(self.MainWidget)

    def OnClicked(self):
        Window = UI2Window()
        self.StackedLayout.addWidget(Window)
        self.StackedLayout.setCurrentIndex(1)

    def CreateMainLayout(self):
        Widget = QWidget()
        self.VLayout = QVBoxLayout()
        self.Button = QPushButton("UI2")
        self.Button.clicked.connect(self.OnClicked)
        self.VLayout.addWidget(self.Button)     
        Widget.setLayout(self.VLayout)
        return Widget

def main():
    App = QApplication(sys.argv)
    ProgramWindow = UI1Window()
    ProgramWindow.show()
    App.exec_()

if __name__ == "__main__":
    main()

UI“.py中的代码：

import sys
from PyQt4.QtCore import*
from PyQt4.QtGui import *
from UI1 import *

class UI2Window(QMainWindow):
    def __init__(self):
        super().__init__()
        self.Widget = self.CreateMainLayout()
        self.StackedLayout = QStackedLayout()
        self.StackedLayout.addWidget(self.Widget)
        self.MainWidget = QWidget()
        self.MainWidget.setLayout(self.StackedLayout)
        self.setCentralWidget(self.MainWidget)

    def OnClicked(self):
        Window = UI1Window()
        self.StackedLayout.addWidget(Window)
        self.StackedLayout.setCurrentIndex(1)

    def CreateMainLayout(self):
        Widget = QWidget()
        self.VLayout = QVBoxLayout()
        self.Button = QPushButton("UI1")
        self.Button.clicked.connect(self.OnClicked)
        self.VLayout.addWidget(self.Button)     
        Widget.setLayout(self.VLayout)
        return Widget

def main():
    App = QApplication(sys.argv)
    ProgramWindow = UI2Window()
    ProgramWindow.show()
    App.exec_()

if __name__ == "__main__":
    main()

python-3.x

pyqt4

回答 2

Stack Overflow用户

发布于 2016-01-13 04:47:34

你的目标是什么？您不能只创建两个布局，将它们添加到QStackedLayout中，然后在索引0和1之间切换吗？

诸如此类的东西来保存你的代码：

import sys
from PyQt4.QtCore import*
from PyQt4.QtGui import *
from UI2 import *

class UI1Window(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        self.StackedLayout = QStackedLayout()
        self.StackedLayout.addWidget(self.CreateMainLayout())
        self.StackedLayout.addWidget(self.CreateMainLayout2())
        self.MainWidget = QWidget()
        self.MainWidget.setLayout(self.StackedLayout)
        self.setCentralWidget(self.MainWidget)

    def OnClicked(self):
        self.StackedLayout.setCurrentIndex(1 if self.StackedLayout.currentIndex() == 0 else 0)

    def CreateMainLayout(self):
        Widget = QWidget()
        self.VLayout = QVBoxLayout()
        self.Button = QPushButton("UI2")
        self.Button.clicked.connect(self.OnClicked)
        self.VLayout.addWidget(self.Button)
        Widget.setLayout(self.VLayout)
        return Widget

    def CreateMainLayout2(self):
        Widget = QWidget()
        self.VLayout = QVBoxLayout()
        self.Button = QPushButton("UI1")
        self.Button.clicked.connect(self.OnClicked)
        self.VLayout.addWidget(self.Button)
        Widget.setLayout(self.VLayout)
        return Widget

def main():
    App = QApplication(sys.argv)
    ProgramWindow = UI1Window()
    ProgramWindow.show()
    App.exec_()

if __name__ == "__main__":
    main()

我假设您在python中是新的，所以请检查命名约定这里 ;)。

票数 2

Stack Overflow用户

发布于 2016-01-13 07:43:37

多亏了Controlix的帮助。如果其他人需要，代码在下面。

窗口控制器代码：

import sys
from PyQt4.QtCore import*
from PyQt4.QtGui import *
from UI1 import *
from UI2 import *

class Controller(QMainWindow):
    def __init__(self):
        super().__init__()
        self.ImportWindows()
        self.ConnectButtons()
        self.StackedLayout = QStackedLayout()
        self.StackedLayout.addWidget(self.Window1)
        self.StackedLayout.addWidget(self.Window2)
        self.MainWidget = QWidget()
        self.MainWidget.setLayout(self.StackedLayout)
        self.setCentralWidget(self.MainWidget)

    def OnClicked1(self):
        self.StackedLayout.setCurrentIndex(1)

    def OnClicked2(self):
        self.StackedLayout.setCurrentIndex(0)

    def ImportWindows(self):
        self.Window1 = UI1Window()
        self.Window2 = UI2Window()

    def ConnectButtons(self):
        self.Window1.Button.clicked.connect(self.OnClicked1)
        self.Window2.Button.clicked.connect(self.OnClicked2)

def main():
    App = QApplication(sys.argv)
    ProgramWindow = Controller()
    ProgramWindow.show()
    App.exec_()

if __name__ == "__main__":
    main()

Windows代码：

import sys
from PyQt4.QtCore import*
from PyQt4.QtGui import *

class UI1Window(QMainWindow):
    def __init__(self):
        super().__init__()
        self.StackedLayout = QStackedLayout()
        self.StackedLayout.addWidget(self.CreateMainLayout())
        self.MainWidget = QWidget()
        self.MainWidget.setLayout(self.StackedLayout)
        self.setCentralWidget(self.MainWidget)

    def CreateMainLayout(self):
        Widget = QWidget()
        self.VLayout = QVBoxLayout()
        self.Button = QPushButton("UI2")
        self.VLayout.addWidget(self.Button)     
        Widget.setLayout(self.VLayout)
        return Widget

def main():
    App = QApplication(sys.argv)
    ProgramWindow = UI1Window()
    ProgramWindow.show()
    App.exec_()

if __name__ == "__main__":
    main()