在研究了mayaMixin.py之后，我设法获得了我所追求的行为的有效解决方案！这个想法是，您需要在Maya的主窗口中进行挖掘，然后删除其中的所有实例。
关闭窗口或创建新实例后，下面的示例将彻底删除所有实例。停靠或浮动都没关系，看起来工作正常。如果您不想在停靠时将其关闭，也可以随时对其进行调整。由于有很多“陷阱”，我在代码中留下了很多注释。
from shiboken import wrapInstancefrom PySide import QtGui, QtCorefrom maya import OpenMayaUI as OpenMayaUIfrom maya.app.general.mayaMixin import MayaQWidgetDockableMixinfrom maya.OpenMayaUI import MQtUtilclass MyWindow(MayaQWidgetDockableMixin, QtGui.QDialog): toolName = 'myToolWidget' def __init__(self, parent = None): # Delete any previous instances that is detected. Do this before parenting self to main window! self.deleteInstances() super(self.__class__, self).__init__(parent = parent) mayaMainWindowPtr = OpenMayaUI.MQtUtil.mainWindow() self.mayaMainWindow = wrapInstance(long(mayaMainWindowPtr), QtGui.QMainWindow) self.setObjectName(self.__class__.toolName) # Make this unique enough if using it to clear previous instance! # Setup window's properties self.setWindowFlags(QtCore.Qt.Window) self.setWindowTitle('My tool') self.resize(200, 200) # Create a button and stuff it in a layout self.myButton = QtGui.QPushButton('My awesome button!!') self.mainLayout = QtGui.QVBoxLayout() self.mainLayout.addWidget(self.myButton) self.setLayout(self.mainLayout) # If it's floating or docked, this will run and delete it self when it closes. # You can choose not to delete it here so that you can still re-open it through the right-click menu, but do disable any callbacks/timers that will eat memory def dockCloseEventTriggered(self): self.deleteInstances() # Delete any instances of this class def deleteInstances(self): mayaMainWindowPtr = OpenMayaUI.MQtUtil.mainWindow() mayaMainWindow = wrapInstance(long(mayaMainWindowPtr), QtGui.QMainWindow) # important that it's QMainWindow, and not QWidget/QDialog # Go through main window's children to find any previous instances for obj in mayaMainWindow.children(): if type( obj ) == maya.app.general.mayaMixin.MayaQDockWidget: #if obj.widget().__class__ == self.__class__: # Alternatively we can check with this, but it will fail if we re-evaluate the class if obj.widget().objectName() == self.__class__.toolName: # Compare object names # If they share the same name then remove it print 'Deleting instance {0}'.format(obj) mayaMainWindow.removeDockWidget(obj) # This will remove from right-click menu, but won't actually delete it! ( still under mainWindow.children() ) # Delete it for good obj.setParent(None) obj.deleteLater() # Show window with docking ability def run(self): self.show(dockable = True)myWin = MyWindow()myWin.run()这样，就不再污染Maya的环境了。希望能帮助到你！
