PyQT 窗口间数据传递

• 通过 dialog.exec_() 的返回值来判断用户点击ok还是cancel。来做后续处理。

import sys
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
import time


class DateDialog(QDialog):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setWindowTitle('DataDialog')

        layout = QVBoxLayout(self)
        self.datetime = QDateTimeEdit(self)
        self.datetime.setCalendarPopup(True)
        self.datetime.setDateTime(QDateTime.currentDateTime())
        layout.addWidget(self.datetime)

        buttons = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel, Qt.Horizontal, self)
        buttons.accepted.connect(self.accept)
        buttons.rejected.connect(self.reject)
        layout.addWidget(buttons)

    def dateTime(self):
        return self.datetime.dateTime()

    @staticmethod
    def getDateTime(parent=None):
        dialog = DateDialog(parent)
        result = dialog.exec_()
        date = dialog.dateTime()
        return date.date(), date.time(), result == QDialog.Accepted


class WinForm(QWidget):
    def __init__(self, parent=None):
        super(WinForm, self).__init__(parent)
        self.resize(400, 90)
        self.setWindowTitle('对话框关闭时返回值给主窗口例子')

        self.lineEdit = QLineEdit(self)
        self.button1 = QPushButton('弹出对话框1')
        self.button1.clicked.connect(self.onButton1Click)

        self.button2 = QPushButton('弹出对话框2')
        self.button2.clicked.connect(self.onButton2Click)

        gridLayout = QGridLayout()
        gridLayout.addWidget(self.lineEdit)
        gridLayout.addWidget(self.button1)
        gridLayout.addWidget(self.button2)
        self.setLayout(gridLayout)

    def onButton1Click(self):
        dialog = DateDialog(self)
        result = dialog.exec_()		# dialog运行退出后，dialog 对象还在，只是界面显示不在了。
        date = dialog.dateTime()
        self.lineEdit.setText(date.date().toString())
        print('n日期对话框的返回值')
        print('date=%s' % str(date.date()))
        print('time=%s' % str(date.time()))
        print('result=%s' % result)
        dialog.destroy()

    def onButton2Click(self):
        date, time, result = DateDialog.getDateTime()
        self.lineEdit.setText(date.toString())
        print('n日期对话框的返回值')
        print('date=%s' % str(date))
        print('time=%s' % str(time))
        print('result=%s' % result)
        if result == QDialog.Accepted:
            print('点击确认按钮')
        else:
            print('点击取消按钮')


if __name__ == "__main__":
    app = QApplication(sys.argv)
    form = WinForm()
    form.show()
    sys.exit(app.exec_())