关于qt：如何显示QDialog

How to show a QDialog

在包含QTableView的QWidget中按Ctrl+F后，我需要显示一个查找对话框。查找对话框将在表的第一列中搜索以找到匹配项。

在按下Ctrl+F并显示以下代码后，我可以显示QMessageBox：

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class Widget(QWidget):
def __init__(self,md,parent=None):
QWidget.__init__(self,parent)
layout=QVBoxLayout(self)

# initially construct the visible table
tv = QTableView()
# uncomment this if the last column shall cover the rest
tv.horizontalHeader().setStretchLastSection(True)
tv.show()

# set black grid lines
self.setStyleSheet("gridline-color: rgb(39, 42, 49)")

# construct the Qt model belonging to the visible table
model = NvmQtModel(md)
tv.setModel(model)
tv.resizeRowsToContents()
tv.resizeColumnsToContents()

# set the shortcut ctrl+F for find in menu
shortcut = QShortcut(QKeySequence('Ctrl+f'), self)
shortcut.activated.connect(self.handleFind)

# delegate for decimal
delegate = NvmDelegate()
tv.setItemDelegate(delegate)
self.setGeometry(200,200,600,600) # adjust this later
layout.addWidget(tv)

# set window title
self.setWindowTitle("TITLE")

# find function: search in the first column of the table
def handleFind(self):
reply = QMessageBox.question(
self, 'Find', 'Find Dialog',
QMessageBox.Yes | QMessageBox.No)
if reply == QMessageBox.Yes:
print('Yes')
else:
print('No')

然后我将QMessageBox更改为QDialog，但是现在不起作用。如果您能告诉我我在哪里做不正确，我将不胜感激：

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class Widget(QWidget):
def __init__(self,md,parent=None):
QWidget.__init__(self,parent)
layout=QVBoxLayout(self)

# initially construct the visible table
tv = QTableView()
# uncomment this if the last column shall cover the rest
tv.horizontalHeader().setStretchLastSection(True)
tv.show()

# set black grid lines
self.setStyleSheet("gridline-color: rgb(39, 42, 49)")

# construct the Qt model belonging to the visible table
model = NvmQtModel(md)
tv.setModel(model)
tv.resizeRowsToContents()
tv.resizeColumnsToContents()

# set the shortcut ctrl+F for find in menu
shortcut = QShortcut(QKeySequence('Ctrl+f'), self)
shortcut.activated.connect(self.handleFind)

# delegate for decimal
delegate = NvmDelegate()
tv.setItemDelegate(delegate)
self.setGeometry(200,200,600,600) # adjust this later
layout.addWidget(tv)

# set window title
self.setWindowTitle("TITLE")

# find function: search in the first column of the table
def handleFind(self):
findDialog = QDialog()
findLabel = QLabel("Find what", findDialog)
findField = QLineEdit(findDialog)
findButton = QPushButton("Find", findDialog)
closeButton = QPushButton("Close", findDialog)
findDialog.show()

如果希望对话框为模式对话框，请调用findDialog.exec_()：

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from PyQt4.QtGui import *

def handleFind():
findDialog = QDialog()
#findDialog.setModal(True)
findLabel = QLabel("Find what", findDialog)
findField = QLineEdit(findDialog)
findButton = QPushButton("Find", findDialog)
closeButton = QPushButton("Close", findDialog)
#findDialog.show()
findDialog.exec_()

app = QApplication([])

b = QPushButton("click me")
b.clicked.connect(handleFind)
b.show()

app.exec_()