python之PySide2安装使用及QT Designer UI设计案例教程

>>> pip install pyside2 QT Designer

>>> pip show pyside2 Location: c:usersAdministratorappdataroamingpythonpython39site-packages 文件位置C:UsersAdministratorAppDataRoamingPythonPython39site-packagesPySide2designer.exeUnable to lanch C: 

PySide2目录下复制uic.exe到新建的bin文件夹

C:...PythonPython39site-packagesPySide2binuic.exe

Ⅰ. Init 

from PySide2.QtWidgets import * class Window: def __init__(self):self.win = QMainWindow() if __name__ == ’__main__’: app = QApplication([]) w = Window() w.win.show() app.exec_()

from PySide2.QtWidgets import * if __name__ == ’__main__’: app = QApplication([]) win = QMainWindow() win.show() app.exec_()

Ⅱ Example

from PySide2.QtWidgets import * class Window: def __init__(self):self.win = QMainWindow()self.win.resize(500, 400)self.win.move(700, 210)self.win.setWindowTitle('测试窗口') self.textEdit = QTextEdit(self.win)self.textEdit.move(50, 50)self.textEdit.resize(200, 300)self.textEdit.setPlaceholderText('请输入文本') self.button = QPushButton('button', self.win)self.button.move(300, 100)self.button.clicked.connect(self.btnClick) def btnClick(self):info = self.textEdit.toPlainText() # 获取文本信息print(info)# print('button被点击') if __name__ == ’__main__’: app = QApplication([]) # win = QMainWindow() # win.show() w = Window() w.win.show() app.exec_()

QT Designer

1.自动生成代码

...from PySide2.QtCore import QFilefrom PySide2.QtUiTools import QUiLoader ... if __name__ == '__main__': app = QApplication([]) win = QMainWindow() w = Ui_Form() w.setupUi(win) win.show() app.exec_()

2.动态加载ui文件

from PySide2.QtWidgets import *from PySide2.QtCore import QFilefrom PySide2.QtUiTools import QUiLoader class Window: def __init__(self):super(Window, self).__init__() # 从文件中加载UI定义qfile = QFile('demo1.ui')qfile.open(QFile.ReadOnly)qfile.close() # 从UI定义中动态创建一个相应的窗口对象, 将其内部文件定义为self.ui.buttonself.ui = QUiLoader().load(qfile) self.ui.button.clicked.connect(self.btnClick)# self.button.clicked.connect(self.btnClick) def btnClick(self):info = self.ui.textEdit.toPlainText() # 获取文本信息# info = self.textEdit.toPlainText()print(info) if __name__ == ’__main__’: app = QApplication([]) w = Window() w.ui.show() # w.win.show() app.exec_()

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