我有一个QGridLayout
并且需要删除它的所有按钮然后重新创建它们。我尝试使用 after 循环遍历布局count()
以takeAt()
删除返回LayoutItem
的小部件。然而,出于某种原因,我只得到了一半的小部件:其他LayoutItem
的没有小部件。正如我所看到的,这很奇怪。
这是我当前的简化代码。
import sys
from PySide.QtGui import *
from PySide.QtCore import *
class GridView(QWidget):
def __init__(self, parent=None):
super(GridView, self).__init__(parent)
self.grid = QGridLayout(self)
def setButtons(self):
self.clearPage()
for i in xrange(10):
btn = QPushButton(str(i))
self.grid.addWidget(btn, i / 2, i % 2)
def clearPage(self):
for i in xrange(self.grid.count()):
print i
layoutItem = self.grid.takeAt(i)
# the following errors out after the fifth iteration as layoutItem.widget() returns None
print layoutItem.widget()
layoutItem.widget().deleteLater()
app = QApplication(sys.argv)
mainWindow = QWidget()
layout = QVBoxLayout()
mainWindow.setLayout(layout)
btn = QPushButton('test')
v = GridView()
btn.clicked.connect(v.setButtons)
layout.addWidget(v)
layout.addWidget(btn)
mainWindow.show()
sys.exit(app.exec_())