#主要的思路就是创建两个frame（如果有两个以上同理）使用setVisible()函数显示或者隐藏frame 参数是bool值
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
class logindialog(QDialog):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.setWindowTitle('登录界面')
self.resize(200, 200)
self.setFixedSize(self.width(), self.height())
self.setWindowFlags(Qt.WindowCloseButtonHint)
self.frame = QFrame(self)
self.verticalLayout = QVBoxLayout(self.frame)
self.lineEdit_account = QLineEdit()
self.lineEdit_account.setPlaceholderText("请输入账号")
self.verticalLayout.addWidget(self.lineEdit_account)
self.lineEdit_password = QLineEdit()
self.lineEdit_password.setPlaceholderText("请输入密码")
self.verticalLayout.addWidget(self.lineEdit_password)
self.pushButton_enter = QPushButton()
self.pushButton_enter.setText("进入下一个界面")
self.verticalLayout.addWidget(self.pushButton_enter)
self.frame1 = QFrame(self)
self.verticalLayout = QVBoxLayout(self.frame1)
self.pushButton_quit = QPushButton()
self.pushButton_quit.setText("回到主页面")
self.verticalLayout.addWidget(self.pushButton_quit)
self.frame1.setVisible(False)
self.pushButton_enter.clicked.connect(self.on_pushButton_enter_clicked)
self.pushButton_quit.clicked.connect(self.on_pushButton_enter_clicked_1)
def on_pushButton_enter_clicked(self):
self.frame1.setVisible(True)
self.frame.setVisible(False)
def on_pushButton_enter_clicked_1(self):
self.frame1.setVisible(False)
self.frame.setVisible(True)
if __name__ == "__main__":
app = QApplication(sys.argv)
dialog = logindialog()
if dialog.exec_() == QDialog.Accepted:
sys.exit(app.exec_())
