PyQt5学习笔记12----主窗口动态加载Widget

       我们通过Qt Designer设计两个窗口，命名为主窗口(MainForm)和子窗口(ChildrenForm)。我们在主窗口的空白中央添加一个栅格布局并命名为MaingridLayout，等会需要将ChildrenForm放进去。

      

编写代码

from PyQt5 import QtWidgets
from MainForm import Ui_MainForm
from Children import Ui_Form

from PyQt5.QtWidgets import QFileDialog

class MainForm(QtWidgets.QMainWindow,Ui_MainForm):
    def __init__(self):
        super(MainForm,self).__init__()
        self.setupUi(self)

        self.child=ChildrenForm()                          #self.child = children()生成子窗口实例self.child


        self.fileOpen.triggered.connect(self.openMsg)      #菜单的点击事件是triggered
        self.fileClose.triggered.connect(self.close)
        self.actionTst.triggered.connect(self.childShow)   #点击actionTst,子窗口就会显示在主窗口的MaingridLayout中

    def childShow(self):
        self.MaingridLayout.addWidget(self.child)          #添加子窗口
        self.child.show()


    def openMsg(self):
        file,ok=QFileDialog.getOpenFileName(self,"打开","C:/","All Files (*);;Text Files (*.txt)")
        self.statusbar.showMessage(file)                   #在状态栏显示文件地址

class ChildrenForm(QtWidgets.QWidget,Ui_Form):
    def __init__(self):
        super(ChildrenForm,self).__init__()
        self.setupUi(self)

if __name__=="__main__":
    import sys

    app=QtWidgets.QApplication(sys.argv)
    myshow=MainForm()
    myshow.show()
    sys.exit(app.exec_())