如何使用 PyQt5 在秒 window 内触发按钮的点击事件

Question

我有一个主对话框 window 如下所示

单击“确定”按钮后，第二个 window 将打开，如下所示

我需要触发第二次登录按钮frpm的点击事件window。下面是我的代码。但是我没有触发任何方法。

from .gisedify_support_dialog_login import Ui_Dialog
FORM_CLASS, _ = uic.loadUiType(os.path.join(
os.path.dirname(__file__), 'gisedify_support_dialog_base.ui'))
class GisedifySupportDialog(QtWidgets.QDialog, FORM_CLASS):
 def __init__(self, parent=None):
    """Constructor."""
    super(GisedifySupportDialog, self).__init__(parent)
    # Set up the user interface from Designer through FORM_CLASS.
    # After self.setupUi() you can access any designer object by doing
    # self.<objectname>, and you can use autoconnect slots - see
    # http://qt-project.org/doc/qt-4.8/designer-using-a-ui-file.html
    # #widgets-and-dialogs-with-auto-connect
    self.setupUi(self)

  def open_login_dialog(self):
    Dialog = QtWidgets.QDialog()
    ui = Ui_Dialog()
    ui.setupUi(Dialog)
    Dialog.exec_()
    ui.login_button.clicked.connect(self.login)

  def login(self):
    print('success')

class Login_Dialog(QtWidgets.QDialog,Ui_Dialog):
 def __init__(self, parent=None):
    super(Login_Dialog, self).__init__(parent)

Answer 1

QDialog.exec_() 将阻塞，直到用户关闭对话框，因此您需要在调用 Dialog.exec_() 之前设置任何信号槽连接。当对话框关闭时，它 returns 1 当对话框被接受，否则为 0。关闭对话框不会销毁它（除非您设置标志这样做），因此您可以检索在 Dialog.exec_() returns 之后输入的数据。

因此，不是将插槽连接到主 window 中的对话框按钮按钮，而是可以子类化 QDialog，使用 Qt Designer 文件设置 ui，然后连接button.clicked 信号到 QDialog.accept 插槽。然后在主小部件中，您可以像以前一样调用 Dialog.exec_() 并在之后检索信息，例如

from PyQt5 import QtWidgets, QtCore, QtGui


class Login_Dialog(QtWidgets.QDialog, Ui_Dialog):
    def __init__(self, parent = None):
        super().__init__(parent)
        self.setupUi(self)
        self.login_button.clicked.connect(self.accept)


class Widget(QtWidgets.QWidget):
    def __init__(self, parent = None):
        super().__init__(parent)
        # setup ui as before

    def get_login(self):
        dialog = Login_Dialog(self)
        if dialog.exec_():
            # get activation key from dialog
            # (I'm assuming here that the line edit in your dialog is assigned to dialog.line_edit)  
            self.activation_key = dialog.line_edit.text()
            self.login()

    def login(self)
        print(f'The activation_key you entered is {self.activation_key}')

如何使用 PyQt5 在秒 window 内触发按钮的点击事件

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