样式：
注意:内部必须使用布局控件
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPixmap
from PyQt5.QtWidgets import QApplication, QWidget, QGroupBox, QRadioButton, QLabel, QHBoxLayout, QVBoxLayout class Demo(QWidget):
def __init__(self):
super(Demo, self).__init__()
self.groupbox_1 = QGroupBox('On and Off', self) # 实例化组合框
self.groupbox_2 = QGroupBox('Change Color', self) self.red = QRadioButton('Red', self)
self.blue = QRadioButton('Blue', self)
self.green = QRadioButton('Green', self)
self.yellow = QRadioButton('Yellow', self)
self.color_list = [self.red, self.blue, self.green, self.yellow] self.on = QRadioButton('On', self)
self.off = QRadioButton('Off', self) self.pic_label = QLabel(self) self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.h3_layout = QHBoxLayout()
self.all_v_layout = QVBoxLayout() self.layout_init()
self.radiobutton_init()
self.label_init() def layout_init(self):
self.h1_layout.addWidget(self.on)
self.h1_layout.addWidget(self.off)
self.groupbox_1.setLayout(self.h1_layout) #组合框中添加布局 self.h2_layout.addWidget(self.red)
self.h2_layout.addWidget(self.blue)
self.h2_layout.addWidget(self.green)
self.h2_layout.addWidget(self.yellow)
self.groupbox_2.setLayout(self.h2_layout) self.h3_layout.addWidget(self.groupbox_1)
self.h3_layout.addWidget(self.groupbox_2) self.all_v_layout.addWidget(self.pic_label)
self.all_v_layout.addLayout(self.h3_layout) self.setLayout(self.all_v_layout) def radiobutton_init(self):
self.yellow.setChecked(True)
for btn in self.color_list:
btn.clicked.connect(self.change_color_func) self.off.setChecked(True)
self.off.toggled.connect(self.on_and_off_func) def label_init(self):
self.pic_label.setPixmap(QPixmap('images/Off.png'))
self.pic_label.setAlignment(Qt.AlignCenter) def change_color_func(self):
if self.on.isChecked():
path = 'images/{}.png'.format([btn.text() for btn in self.color_list if btn.isChecked()][0])
self.pic_label.setPixmap(QPixmap(path)) def on_and_off_func(self):
if self.on.isChecked():
path = 'images/{}.png'.format([btn.text() for btn in self.color_list if btn.isChecked()][0])
self.pic_label.setPixmap(QPixmap(path))
else:
self.pic_label.setPixmap(QPixmap('images/Off.png')) if __name__ == '__main__':
app = QApplication(sys.argv)
demo = Demo()
demo.show()
sys.exit(app.exec_())