如何在 PQT5 中将事件添加到标签

Question

我的问题是我想分别在标签中添加一个事件，在我的情况下是 mousePressEvent。但它在此文本下不起作用是我的一些代码不起作用。

self.label2.mousePressEvent = self.credits

    def credits(self, event):
        print("credits")

这里我得到错误 AttributeError: 'Window' object has no attribute 'label2'

我也试试这个：

label2.mousePressEvent.connect(self.credits)

def credits(self):
            print("credits")

这也行得通 :( 任何想法如果有人能帮助我我很高兴 :( 如果您需要这里的完整代码：

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

class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.initMe()

    def initMe(self):

        label1 = QtWidgets.QLabel(self)
        label1.setText("Überschrift mit namen des text adventure")
        label1.setStyleSheet("font-size: 18px;color: black;")
        label1.setGeometry(50, 50, 400, 100)
        label1.move(350,50)

        label2 = QtWidgets.QLabel(self)
        label2.setText("Spielen")
        label2.setStyleSheet("font-size: 18px;color: black;")
        label2.setGeometry(50, 50, 400, 100)
        label2.move(450, 120)
        self.label2.mousePressEvent = self.spielen

        label3 = QtWidgets.QLabel(self)
        label3.setText("Settings")
        label3.setStyleSheet("font-size: 18px;color: black;")
        label3.setGeometry(50, 50, 400, 100)
        label3.move(450, 200)
        self.label3.mousePressEvent = self.settings

        label4 = QtWidgets.QLabel(self)
        label4.setText("Credits")
        label4.setStyleSheet("font-size: 18px;color: black;")
        label4.setGeometry(50, 50, 400, 100)
        label4.move(450, 280)
        self.label4.mousePressEvent = self.credits

        QToolTip.setFont(QFont("Arial", 10 ))
        button = QPushButton("Spiel beenden", self)
        button.setGeometry(50,50,150,50)
        button.setFont(QFont("Arial", 12))
        button.move(820, 420)
        button.setToolTip("<b>Button lel</b>")
        button.clicked.connect(QtCore.QCoreApplication.instance().quit)
        button.clicked.connect(self.gedruekt)
        button.setStyleSheet("background-color: white;")

        self.setGeometry(50,50,1000,500)
        self.setWindowTitle("Gui lalal einhorn")
        self.setWindowIcon(QIcon("cookie.png"))
        self.setAutoFillBackground(True)
        self.setStyleSheet("background-color: lightblue;")
        self.move(500, 250)
        self.show()

    def spielen(self, event):
        print("spielen")

    def settings(self, event):
        print("settings")

    def credits(self, event):
        print("credits")

    def gedruekt(self):
        print("Er hats getan ;(")

if __name__ == "__main__":
    app = QApplication(sys.argv)
    w = Window()
    sys.exit(app.exec_())
else:
    print("Gui not created, because script used at liabary")

Answer 1

问题是变量不是类的成员，所以没有必要使用self 实例，例如，它会改变：

self.label2.mousePressEvent = self.spielen

到：

label2.mousePressEvent = self.spielen

如果您想使用连接，这仅适用于信号，为此我们创建一个自定义 QLabel 类，如下所示：

class Label(QLabel):
    clicked = pyqtSignal()
    def __init__(self, parent=None):
        QLabel.__init__(self, parent=parent)

    def mousePressEvent(self, event):
        self.clicked.emit()

在这种情况下，您将如下所示：

class Label(QLabel):
    clicked = pyqtSignal()
    def __init__(self, parent=None):
        QLabel.__init__(self, parent=parent)

    def mousePressEvent(self, event):
        self.clicked.emit()

class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.initMe()

    def initMe(self):

        label1 = QLabel(self)
        label1.setText("Überschrift mit namen des text adventure")
        label1.setStyleSheet("font-size: 18px;color: black;")
        label1.setGeometry(50, 50, 400, 100)
        label1.move(350,50)

        label2 = Label(self)
        label2.setText("Spielen")
        label2.setStyleSheet("font-size: 18px;color: black;")
        label2.setGeometry(50, 50, 400, 100)
        label2.move(450, 120)
        label2.clicked.connect(self.spielen)

        label3 = Label(self)
        label3.setText("Settings")
        label3.setStyleSheet("font-size: 18px;color: black;")
        label3.setGeometry(50, 50, 400, 100)
        label3.move(450, 200)
        label3.clicked.connect(self.settings)

        label4 = Label(self)
        label4.setText("Credits")
        label4.setStyleSheet("font-size: 18px;color: black;")
        label4.setGeometry(50, 50, 400, 100)
        label4.move(450, 280)
        label4.clicked.connect(self.credits)

        QToolTip.setFont(QFont("Arial", 10 ))
        button = QPushButton("Spiel beenden", self)
        button.setGeometry(50,50,150,50)
        button.setFont(QFont("Arial", 12))
        button.move(820, 420)
        button.setToolTip("<b>Button lel</b>")
        button.clicked.connect(self.close)
        button.clicked.connect(self.gedruekt)
        button.setStyleSheet("background-color: white;")

        self.setGeometry(50,50,1000,500)
        self.setWindowTitle("Gui lalal einhorn")
        self.setWindowIcon(QIcon("cookie.png"))
        self.setAutoFillBackground(True)
        self.setStyleSheet("background-color: lightblue;")
        self.move(500, 250)
        self.show()

    def spielen(self):
        print("spielen")

    def settings(self):
        print("settings")

    def credits(self):
        print("credits")

    def gedruekt(self):
        print("Er hats getan ;(")

if __name__ == "__main__":
    app = QApplication(sys.argv)
    w = Window()
    sys.exit(app.exec_())