pyqt5使用按钮进行界面的跳转方法

简介

进行按钮进行界面的跳转，我这里面我介绍两种，一种是没有使用Qtdesigner的代码，另一种是使用Qtdesigner的代码

代码1

import sys
from PyQt5.QtWidgets import QMainWindow, QPushButton, QApplication

class First(QMainWindow):

def __init__(self):
   super().__init__()

self.initUI()

def initUI(self):
   self.btn = QPushButton("Button", self)
   self.btn.move(30, 50)

self.setGeometry(300, 300, 500, 500)
   self.setWindowTitle('Event sender')
   self.show()

class Second(QMainWindow):
 def __init__(self):
   super().__init__()

self.initUI()

def initUI(self):
   self.setGeometry(300, 300, 290, 150)
   self.setWindowTitle('Get sender')

if __name__ == '__main__':
 app = QApplication(sys.argv)
 a = First()
 b = Second()
 a.show()
 a.btn.clicked.connect(b.show)
 sys.exit(app.exec_())

代码2

下面的代码使用了Qtdesigner的代码

from PyQt5 import QtCore, QtGui, QtWidgets
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QLabel,\
                    QPushButton, QLineEdit, QMenuBar, QStatusBar
from PyQt5.QtCore import *

class FirstWindow(QWidget):

def __init__(self, parent=None):
   # super这个用法是调用父类的构造函数
   # parent=None表示默认没有父Widget，如果指定父亲Widget，则调用之
   super(FirstWindow, self).__init__(parent)
   self.setGeometry(500, 500, 500, 500)
   self.setWindowTitle('显示')

self.btn = QPushButton(self)
   self.btn.setText('标定')
   self.btn.move(150, 50)

#下面的一部分是Qtdesigner的代码

class Ui_MainWindow(object):
 def setupUi(self, MainWindow):
   MainWindow.setObjectName("MainWindow")
   MainWindow.resize(624, 479)
   self.centralwidget = QtWidgets.QWidget(MainWindow)
   self.centralwidget.setObjectName("centralwidget")
   self.label = QtWidgets.QLabel(self.centralwidget)
   self.label.setGeometry(QtCore.QRect(190, 130, 51, 31))
   self.label.setObjectName("label")
   self.pushButton = QtWidgets.QPushButton(self.centralwidget)
   self.pushButton.setGeometry(QtCore.QRect(330, 260, 75, 23))
   self.pushButton.setObjectName("pushButton")
   self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
   self.lineEdit.setGeometry(QtCore.QRect(280, 130, 151, 21))
   self.lineEdit.setObjectName("lineEdit")
   self.label_2 = QtWidgets.QLabel(self.centralwidget)
   self.label_2.setGeometry(QtCore.QRect(190, 180, 51, 31))
   self.label_2.setObjectName("label_2")
   self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)
   self.lineEdit_2.setGeometry(QtCore.QRect(280, 190, 151, 21))
   self.lineEdit_2.setObjectName("lineEdit_2")
   self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
   self.pushButton_2.setGeometry(QtCore.QRect(200, 260, 75, 23))
   self.pushButton_2.setObjectName("pushButton_2")
   MainWindow.setCentralWidget(self.centralwidget)
   self.menubar = QtWidgets.QMenuBar(MainWindow)
   self.menubar.setGeometry(QtCore.QRect(0, 0, 624, 23))
   self.menubar.setObjectName("menubar")
   MainWindow.setMenuBar(self.menubar)
   self.statusbar = QtWidgets.QStatusBar(MainWindow)
   self.statusbar.setObjectName("statusbar")
   MainWindow.setStatusBar(self.statusbar)

self.retranslateUi(MainWindow)
   QtCore.QMetaObject.connectSlotsByName(MainWindow)

def retranslateUi(self, MainWindow):
   _translate = QtCore.QCoreApplication.translate
   MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
   self.label.setText(_translate("MainWindow", "  长"))
   self.pushButton.setText(_translate("MainWindow", "确定"))
   self.label_2.setText(_translate("MainWindow", "  宽"))
   self.pushButton_2.setText(_translate("MainWindow", "取消"))

if __name__ == "__main__":
 app = QApplication(sys.argv)
 MainWindow = QMainWindow()
 ui = Ui_MainWindow()
 ui.setupUi(MainWindow)

ex = FirstWindow()
 ex.btn.clicked.connect(MainWindow.show)
 ex.show()

sys.exit(app.exec_())

来源：https://blog.csdn.net/pursuit_zhangyu/article/details/82916224