<p>下面是一个小小的更改,它将使按钮在单击后自动删除:</p>
<pre><code>from PyQt4 import QtGui, QtCore
import sys
class Main(QtGui.QMainWindow):
def __init__(self, parent = None):
super(Main, self).__init__(parent)
# main button
self.addButton = QtGui.QPushButton('button to add other widgets')
self.addButton.clicked.connect(self.addWidget)
# scroll area widget contents - layout
self.scrollLayout = QtGui.QFormLayout()
# scroll area widget contents
self.scrollWidget = QtGui.QWidget()
self.scrollWidget.setLayout(self.scrollLayout)
# scroll area
self.scrollArea = QtGui.QScrollArea()
self.scrollArea.setWidgetResizable(True)
self.scrollArea.setWidget(self.scrollWidget)
# main layout
self.mainLayout = QtGui.QVBoxLayout()
# add all main to the main vLayout
self.mainLayout.addWidget(self.addButton)
self.mainLayout.addWidget(self.scrollArea)
# central widget
self.centralWidget = QtGui.QWidget()
self.centralWidget.setLayout(self.mainLayout)
# set central widget
self.setCentralWidget(self.centralWidget)
def addWidget(self):
self.scrollLayout.addRow(TestButton())
class TestButton(QtGui.QPushButton):
def __init__( self, parent=None):
super(TestButton, self).__init__(parent)
self.setText("I am in Test widget")
self.clicked.connect(self.deleteLater)
app = QtGui.QApplication(sys.argv)
myWidget = Main()
myWidget.show()
app.exec_()
</code></pre>
<p>这样在删除时就不会泄露内存,而且这个按钮实际上可以用来做一些事情。我在下载和块监控方面遵循了几十条进度条的这种模式,即使在线程和多处理方面也很好。而不是简单的QThreads。。。</p>