1.QPushButton简介

PyQt5中QPushButton常用的按钮控件，用于创建用户界面中的按钮。

2.QPushButton案例

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout
from PyQt5.QtGui import QIcon, QPixmap
from functools import partial


class QPushButtonDemo(QWidget):
    def __init__(self):
        super(QPushButtonDemo, self).__init__()
        self.init_ui()

    def init_ui(self):
        v_layout = QVBoxLayout(self)
        self.resize(500, 300)

        self.btn1 = QPushButton('Button 1')
        self.btn1.setCheckable(True)    # 设置按钮默认被选中
        self.btn1.toggle()
        
        # self.btn1.clicked.connect(lambda: self.click_button(666))  # 通过lambda方式向事件传参
        self.btn1.clicked.connect(partial(self.click_button, 666))  # 通过partial方式向事件传参
        self.btn1.clicked.connect(self.button_status)  # 同一个按钮绑定多事件

        self.btn2 = QPushButton('图像按钮')
        self.btn2.setIcon(QIcon(QPixmap(r'../py.png')))  # 按钮设置图像

        self.btn3 = QPushButton('禁用按钮')
        self.btn3.setEnabled(False)  # 禁用按钮

        self.btn4 = QPushButton('默认按钮')
        self.btn4.setDefault(True)
        self.btn4.resize(200, 50)

        v_layout.addWidget(self.btn1)
        v_layout.addWidget(self.btn2)
        v_layout.addWidget(self.btn3)
        v_layout.addWidget(self.btn4)

    def click_button(self, btn):
        print(btn)

    def button_status(self):
        if self.btn1.isChecked():
            print('被选中')
        else:
            print('未被选中')


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

3.运行结果

4.常用方法

5.常用信号