pyside6 子窗口给主窗口传参（信号）

思路

和主窗口给子窗口传参数不同的点就是需要把，主窗口传入子窗口

代码

from PySide6.QtWidgets import QApplication, QWidget, QVBoxLayout, QLabel, QPushButton, QLineEdit
from PySide6.QtCore import Signal, Slot


class Mywindow(QWidget):

    def __init__(self):
        super().__init__()

        self.mainLayout = QVBoxLayout()
        self.label = QLabel('主窗口:')
        self.IPLineEdit = QLineEdit()
        self.mainLayout.addWidget(self.label)
        self.mainLayout.addWidget(self.IPLineEdit)

        self.setLayout(self.mainLayout)
        self.bind()

    def bind(self):
        self.subwindow = Subwindow(self)
        self.subwindow.show()


class Subwindow(QWidget):
    sendValueTomain = Signal(str)  # 0.创建一个信号，并且带一个字符串类型参数

    def __init__(self, mainwindow):  # 这里接受主窗口
        super().__init__()
        self.mainwindow = mainwindow
        self.mainLayout = QVBoxLayout()
        self.label = QLabel("子窗口")
        self.sublineedit = QLineEdit()
        self.sendbtn = QPushButton('发送给主窗口')
        self.mainLayout.addWidget(self.label)
        self.mainLayout.addWidget(self.sublineedit)
        self.mainLayout.addWidget(self.sendbtn)

        self.setLayout(self.mainLayout)
        self.bind()

    def bind(self):
        self.sendbtn.clicked.connect(self.sendvalue)
        self.sendValueTomain.connect(self.mainwindow.IPLineEdit.setText)  # 子窗口信号绑定修改主窗口的值

    def sendvalue(self):
        text = self.sublineedit.text()
        print(text)
        self.sendValueTomain.emit(text)


if __name__ == '__main__':
    app = QApplication([])
    window = Mywindow()
    window.show()
    app.exec()