利用PyQt5实现窗口切换

下面是一个小程序，利用PyQt5实现窗口切换，希望对大家有所帮助。
           

```python
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QPushButton,QDialog,QLabel


class main_windows(QWidget):
	def __init__(self):
		super(main_windows,self).__init__()

	def setupUi(self,Form):
		Form.setObjectName("Form")
		Form.resize(500,500)
		self.form = Form
		
		self.btn1 = QPushButton(Form)
		self.btn1.setGeometry(100,100,100,100)
		self.btn1.setText("进入dialog1")
		self.btn1.clicked.connect(self.slot_btn1_function)

	def slot_btn1_function(self):
		self.form.hide()
		Form1 = QDialog()
		first_Dialog = Dialog1()
		first_Dialog.setupUi(Form1)
		Form1.show()
		Form1.exec_()
		self.form.show()

class Dialog1(QWidget):
	"""docstring for Dialog1"""
	def setupUi(self,Dialog):
		Dialog.setObjectName('Dialog')
		Dialog.resize(500,500)
		self.form = Dialog
		self.btn1 = QPushButton(Dialog)
		self.btn1.setGeometry(100,200,200,100)
		self.btn1.setText('进入mian_windows')

		self.btn1.clicked.connect(self.slot_btn1_function)


	def slot_btn1_function(self):
		self.form.close()
		


if __name__ == '__main__':
	app = QApplication(sys.argv)
	w = main_windows()
	Form = QWidget()
	w.setupUi(Form)
	Form.show()
	sys.exit(app.exec_())


           

具体效果见下图：

![程序效果](https://img-blog.csdnimg.cn/20200509213345583.gif#pic_center)

最核心的几句程序：

```python
self.form.hide()
           

隐藏原界面。

显示新界面

一直显示。