PyQt5基本窗口控件-----QPushButton
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2022-05-28 11:01:58
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PyQt5学习之路,点击有pyqt5学习笔记
按钮的基类是QAbstractButton,该类为抽象类,不能实例化,必须由其他按钮类去继承。
常见的按钮类:
-
QPushButton
:最普通辣个按钮 -
QToolButton
: 工具条按钮 -
QRadioButton
:单选按钮 -
QCheckBox
:复选框
import sys
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class QPushButtonDemo(QDialog):
def __init__(self):
super(QPushButtonDemo, self).__init__()
self.initUI()
def initUI(self):
self.setWindowTitle('QPushButtonDemo')
self.resize(300, 200)
layout = QVBoxLayout()
self.button1 = QPushButton('第一个按钮')
# 后期设置按钮文本内容
self.button1.setText('First Button1')
# 使button1处于选中的状态
self.button1.setCheckable(True)
# 开关按钮
self.button1.toggle()
self.button1.clicked.connect(self.buttonState)
self.button1.clicked.connect(lambda :self.whichButton(self.button1))
# 在文本前面显示图像
self.button2 = QPushButton('图像按钮')
self.button2.setIcon(QIcon(QPixmap('./about_us_bk.jpg')))
self.button2.clicked.connect(lambda :self.whichButton(self.button2))
# 不可用按钮
self.button3 = QPushButton('不可用按钮')
# 设置为不可用
self.button3.setEnabled(False)
# 设置按钮的默认状态
self.button4 = QPushButton('&MyButton')
# 设置按钮默认为按下,不理解就看图
self.button4.setDefault(True)
self.button4.clicked.connect(lambda :self.whichButton(self.button4))
layout.addWidget(self.button1)
layout.addWidget(self.button2)
layout.addWidget(self.button3)
layout.addWidget(self.button4)
self.setLayout(layout)
def whichButton(self, btn):
print('被单击的按钮是<' + btn.text() + '>')
def buttonState(self):
if self.button1.isChecked():
print('按钮1已经被选择')
else:
print('按钮1未被选中')
if __name__ == '__main__':
app = QApplication(sys.argv)
main = QPushButtonDemo()
main.show()
sys.exit(app.exec_())
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