8.QPushButton 控件_self.pushbutton.setcheckable-优快云博客

本文链接：https://blog.youkuaiyun.com/zmjames2000/article/details/100675778

本文深入探讨了QPushButton组件的使用方法，包括如何设置按钮文本、图标、状态及响应点击事件。通过具体实例展示了不同类型的按钮，如可检查按钮、禁用按钮和默认按钮的功能与实现。

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QPushButton 父类 QAbstractButton

QAbstracktButton

QPushButton

QToolButton

QRadioButton

QCheckBox

    def initUI(self):
        self.setWindowTitle('QLineEditDemo')
        self.setGeometry(500,500,300,200)

        self.button1 = QPushButton('button1') #可以查看按钮的基类，有方法settext
        self.button1.setText('first button1')
        self.button1.setCheckable(True)  #可以checkable  处于选中的状态
        self.button1.toggle() #设置开关 按下不会弹起，再次按下才会弹起
        self.button1.clicked.connect(lambda :self.SwitchButton(self.button1)) #必须是这样
        # self.button1.clicked.connect(self.SwitchButton(self.button1)) 如果函数需要传参数的话，这样是错误的
        self.button1.clicked.connect(self.buttonState)

        button2 = QPushButton('button2 Qicon')
        button2.setIcon(QIcon(QPixmap('file_path')))
        button2.clicked.connect(lambda :self.SwitchButton(button2))
        button2.clicked.connect(self.buttonState)

        button3 = QPushButton('unuse')
        button3.setEnabled(False)

        button4 = QPushButton('&Mybutton')
        button4.setDefault(True)
        button4.clicked.connect(lambda :self.SwitchButton(button4))

        layout = QVBoxLayout()
        layout.addWidget(self.button1)
        layout.addWidget(button2)
        layout.addWidget(button3)
        layout.addWidget(button4)
        self.setLayout(layout)

    def SwitchButton(self,btn):
        print('which button is clicked: '+btn.text()+'>')

    def buttonState(self):  #设置开关 按下不会弹起，再次按下才会弹起
        if self.button1.isChecked():
            print("checked")
        else:
            print("unchecked")