single button
The QRadioButton widget provides a radio button with a text label (it's essentially a button).
A QRadioButton is an option button that can be turned on (checked) or turned off (unchecked) . Radio buttons usually provide the user with a "select one" action. In a group of radio buttons, only one radio button can be checked at a time; if the user selects another button, the previously selected button is dismissed.
Radio buttons default to autoExclusive . If automatic mutual exclusion is enabled, the behavior of radio buttons that belong to the same parent widget is part of the same exclusive button group. Of course, adding QButtonGroup can achieve mutual exclusion of multiple groups of radio buttons .
The toggled() signal is emitted whenever the button is turned on or off. Connect to this signal if you want to trigger an action every time the button changes state. Use isChecked() to see if a specific button is selected .
Just like QPushButton, radio buttons display text and optionally a small icon. The icon is set with setIcon(). The text can be set in the constructor or in setText(). Shortcut keys can be specified by preceding the text with an ampersand.
Chestnut
from PyQt5.QtWidgets import QWidget, QRadioButton, QApplication, QPushButton, QMessageBox, QButtonGroup
import sys
class Example(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.rb11 = QRadioButton('你是',self)
self.rb12 = QRadioButton('我是',self)
self.rb13 = QRadioButton('他是',self)
self.rb21 = QRadioButton('大美女',self)
self.rb22 = QRadioButton('大帅哥',self)
self.rb23 = QRadioButton('小屁孩',self)
bt1 = QPushButton('提交',self)
self.resize(320,180)
self.setWindowTitle('关注微信公众号：学点编程吧--单选按钮')
"""
新建6个单选按钮。如果不增加分组，这个6个单选按钮是互斥的，因为单选按钮默认为autoExclusive（自动互斥）。
"""
self.rb11.move(20,20)
self.rb12.move(20,50)
self.rb13.move(20,80)
self.rb21.move(90,20)
self.rb22.move(90,50)
self.rb23.move(90,80)
bt1.move(20,120)
"""
将单选按钮添加到分组中，同时分配一个id号
"""
self.bg1 = QButtonGroup(self)
self.bg1.addButton(self.rb11, 11)
self.bg1.addButton(self.rb12, 12)
self.bg1.addButton(self.rb13, 13)
self.bg2 = QButtonGroup(self)
self.bg2.addButton(self.rb21, 21)
self.bg2.addButton(self.rb22, 22)
self.bg2.addButton(self.rb23, 23)
self.info1 = ''
self.info2 = ''
"""
当我们在分组中点击给定按钮的时候会发出buttonClicked()信号，同时我们连接到rbclicked这个槽函数上。
"""
self.bg1.buttonClicked.connect(self.rbclicked)
self.bg2.buttonClicked.connect(self.rbclicked)
bt1.clicked.connect(self.submit)
self.show()
"""
这个就是当我们点击提交按钮的时候，根据self.info1和self.info2的值弹出相应的消息了。
"""
def submit(self):
if self.info1 == '' or self.info2 == '':
QMessageBox.information(self,'What?','貌似有没有选的啊，快去选一个吧！')
else:
QMessageBox.information(self,'What?',self.info1+self.info2)
"""
我们判断到底是点了哪个分组，怎么判断？使用self.sender()函数将信号的产生对象送过来。然后根据checkedId()去获得这个按钮的id号，通过id号的判断我们到底是点了哪个单选按钮。
"""
def rbclicked(self):
sender = self.sender()
if sender == self.bg1:
if self.bg1.checkedId() == 11:
self.info1 = '你是'
elif self.bg1.checkedId() == 12:
self.info1 = '我是'
elif self.bg1.checkedId() == 13:
self.info1 = '他是'
else:
self.info1 = ''
else:
if self.bg2.checkedId() == 21:
self.info2 = '大美女'
elif self.bg2.checkedId() == 22:
self.info2 = '大帅哥'
elif self.bg2.checkedId() == 23:
self.info2 = '小屁孩'
else:
self.info2 = ''
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
For specific running results, please refer to:
https://zhuanlan.zhihu.com/p/30708796
Thank you "Learn some programming"