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Asked:2021-12-31 18:32:53 +0000 UTC2021-12-31 18:32:53 +0000 UTC

如何从列表 PyQT5 中显示按钮文本

  • 772

如何定义单个按钮的功能？
告诉我如何解决当您单击按钮（已在下方列表中）时显示在控制台中的是最后添加的按钮（其文本）的错误。
根据这个想法，它应该显示被点击的按钮的文本。

from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QFrame, QPushButton
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow


class Example(QMainWindow):
    def __init__(self):
        super().__init__()
        self.count_of_buttons = 1

        self.centralWidget = QWidget()
        self.setCentralWidget(self.centralWidget)

        self.setGeometry(700, 200, 500, 400)

        self.button_hello = QPushButton('Hello')
        self.button_hello.clicked.connect(self.add_button)

        self.layout_buttons = QVBoxLayout()
        self.layout_buttons.addStretch()  # Это добавит пружину, прижимающую виджеты вверх

        self.frame = QFrame()
        self.frame.setMinimumSize(200, 200)
        self.frame.setFrameStyle(QFrame.Box)
        self.frame.setLayout(self.layout_buttons)

        main_layout = QVBoxLayout(self.centralWidget)
        main_layout.addWidget(self.button_hello)
        main_layout.addWidget(self.frame)


    def add_button(self):
        self.button = QPushButton(f"Кнопка № {self.count_of_buttons}")
        self.button.clicked.connect(self.pressed_btn)
        self.count_of_buttons += 1
        self.layout_buttons.insertWidget(0, self.button)  # Добавление в начало, с пружиной это прижмет вверх



    def pressed_btn(self):
        print(f"кнопка нажата: {self.button.text()}") # выводится постоянно последняя добавленная кнопка




if __name__ == '__main__':
    app = QApplication(sys.argv)
    form = Example()
    form.show()
    sys.exit(app.exec())

也许您可以以某种方式按类型访问按钮：

print(QPushButton().text())
python

1 个回答

  1. Best Answer

    试试这样：

    import sys
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QFrame, \
    QPushButton, QMainWindow


class Example(QMainWindow):
    def __init__(self):
        super().__init__()
        self.count_of_buttons = 1

        self.centralWidget = QWidget()
        self.setCentralWidget(self.centralWidget)

        self.setGeometry(700, 200, 500, 400)

        self.button_hello = QPushButton('Hello')
        self.button_hello.clicked.connect(self.add_button)

        self.layout_buttons = QVBoxLayout()
        self.layout_buttons.addStretch()  # Это добавит пружину, прижимающую виджеты вверх

        self.frame = QFrame()
        self.frame.setMinimumSize(200, 200)
        self.frame.setFrameStyle(QFrame.Box)
        self.frame.setLayout(self.layout_buttons)

        main_layout = QVBoxLayout(self.centralWidget)
        main_layout.addWidget(self.button_hello)
        main_layout.addWidget(self.frame)

    def add_button(self):
        self.button = QPushButton(f"Кнопка № {self.count_of_buttons}")
        
        self.button.clicked.connect(lambda ch, btn=self.button: self.pressed_btn(btn))  # + lambda
        
        self.count_of_buttons += 1
        self.layout_buttons.insertWidget(0, self.button)  # Добавление в начало, с пружиной это прижмет вверх

    def pressed_btn(self, btn):                                                         # + btn
        print(f"кнопка нажата: {btn.text()}")                                           # + btn 


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

    在此处输入图像描述

    • 1

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