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

pyside2 

>>> pip install pyside2

 QT Designer

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

Unable 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.button self.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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