Question

我有一个大型机，然后点击按钮打开一个新对话框，

对话框有一个计时器，让计时器以3秒的间隔显示消息，

但如果单击右上方的关闭按钮关闭对话框，则消息框仍会运行，

如何避免它？

谢谢！

from PySide2.QtWidgets import QApplication,QMainWindow,QTabWidget,QWidget
from PySide2.QtWidgets import QMessageBox,QFileDialog,QErrorMessage
from PySide2 import QtCore, QtGui, QtWidgets
class UI_Test20(object):
    def setupUi(self, Test202):
        Test202.setObjectName("Test202")
        Test202.resize(100,100)
        self.centralwidget = QtWidgets.QWidget(Test202)
        self.centralwidget.setObjectName("centralwidget")
        self.pb = QtWidgets.QPushButton(self.centralwidget)
        self.pb.setText('push button!')
        Test202.setCentralWidget(self.centralwidget)
        self.pb.clicked.connect(self.btnClicked)
        self.retranslateUi(Test202)
        QtCore.QMetaObject.connectSlotsByName(Test202)

    def retranslateUi(self, Test202):
        Test202.setWindowTitle(QtWidgets.QApplication.translate("Test202", "MainWindow", None, -1))

    def btnClicked(self):
        self.ui = Ui_Dialog1(self)
        self.ui.show()

class Test20(QMainWindow, UI_Test20) :

    def __init__(self, parent):
        super(Test20, self).__init__(parent)
        self.setupUi(self)

和对话框代码

class Ui_Dialog1(QtWidgets.QDialog):

    def __init__(self, parent=None):
        super(Ui_Dialog1, self).__init__(parent)
        self.p = parent
        self.setupUi(self)

        self.timer = QtCore.QTimer()
        self.timer.timeout.connect(self.update)
        self.timer.start(3000) 
    def update(self):
        QMessageBox.information(self,'123','123')

    def setupUi(self, Dialog1):
        Dialog1.setObjectName("Dialog1")
        Dialog1.resize(333, 173)

主

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    ui = Test20(None)
    ui.show()
    sys.exit(app.exec_())

Answer 1

当您使用QDialog调用show（）方法时，您的对话框将是无模式的，并且在它关闭时将被隐藏而不会被删除。要确保删除对话框，请在对话框初始化方法中再添加一行：

def __init__(self, parent=None):
    super(Ui_Dialog1, self).__init__(parent)
    self.p = parent
    self.setupUi(self)

    self.timer = QtCore.QTimer()
    self.timer.timeout.connect(self.update)
    self.timer.start(3000)
    #Make sure that your dialog will be deleted not hidden
    self.setAttribute(QtGui.Qt.WA_DeleteOnClose)

如果对话框由大型机打开，如何正确关闭对话框

1 个答案: