pyqt 学习

from PyQt5.Qt import *
import sys

app = QApplication(sys.argv)
wind = QWidget()
wind.resize(500,500)

btn = QPushButton('菜单',wind)
menu =QMenu()

open = QAction('打开文件',menu)
recent = QAction('最近打开',menu)

menu.addAction(open)
menu.addAction(recent)


btn.setMenu(menu)


wind.show()

sys.exit(app.exec_())

这个是创建一个gui的开始

创建一个工具按钮Toolbutton

from PyQt5.Qt import *
import sys

app = QApplication(sys.argv)
wind = QWidget()
wind.resize(500, 500)
btn = QToolButton(wind)
btn.setText('工具一')
btn.setAutoRaise(True)
btn.move(100, 100)

wind.show()

sys.exit(app.exec_())x

from PyQt5.Qt import *
import sys

app = QApplication(sys.argv)
wind = QWidget()
wind.resize(500, 500)
menu = QMenu()
open_action = QAction('打开', menu)
menu.addAction(open_action)
open_action.triggered.connect(lambda: print('打开文件！'))

btn = QPushButton('菜单', wind)

btn.setMenu(menu)

wind.show()

sys.exit(app.exec_())

新建菜单