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

>>> pip install pyside2

>>> pip show pyside2
 
Location: c:\users\Administrator\appdata\roaming\python\python39\site-packages
 
 
文件位置
C:\Users\Administrator\AppData\Roaming\Python\Python39\site-packages\PySide2\designer.exe

C:\...\Python\Python39\site-packages\PySide2\bin\uic.exe

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_()

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_()

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

from PySide2.QtWidgets import *
from PySide2.QtCore import QFile
from 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_()