Pyqt 简明教程

PyQt - Hello World

使用 PyQt 创建简单的 GUI 应用程序涉及以下步骤 −

Creating a simple GUI application using PyQt involves the following steps −

  1. Import QtGui module.

  2. Create an application object.

  3. A QWidget object creates top level window. Add QLabel object in it.

  4. Set the caption of label as “hello world”.

  5. Define the size and position of window by setGeometry() method.

  6. Enter the mainloop of application by app.exec_() method.

import sys
from PyQt4 import QtGui

def window():
   app = QtGui.QApplication(sys.argv)
   w = QtGui.QWidget()
   b = QtGui.QLabel(w)
   b.setText("Hello World!")
   w.setGeometry(100,100,200,50)
   b.move(50,20)
   w.setWindowTitle(“PyQt”)
   w.show()
   sys.exit(app.exec_())

if __name__ == '__main__':
   window()

上述代码生成以下输出 -

The above code produces the following output −

hello world