python实现点击按钮切换到另外一个界面_如何使用PyQt从另一个窗口单击按钮打开窗口？...
我正在试着做一个应用程序，但是我一直被“简单”的事情所困扰，比如这个，我如何通过点击一个按钮来打开一个新窗口？我试过使用new_lib_btn.clicked.connect(newlib)，newlib是包含我的第二个窗口的文件，new_lib_btn是应该打开窗口的按钮，它在我的主窗口中，您可以在下面看到：
mainwindow.pyfrom PyQt4 import QtCore, QtGui
import newlib
import sys
# Main Window
class Window (QtGui.QMainWindow):
def __init__(self):
super(Window, self).__init__()
centralwidget = QtGui.QWidget(self)
self.mainLayout = QtGui.QVBoxLayout(centralwidget)
self.mainLayout.setAlignment(QtCore.Qt.AlignCenter)
self.setCentralWidget(centralwidget)
self.resize(800, 600)
self.setWindowTitle("Virtual Library")
self.setStyleSheet("Window {border-image: url(lib.jpg);}")
# ExitOption
menu_action1 = QtGui.QAction("Exit", self)
menu_action1.setShortcut("Ctrl+Q")
menu_action1.setStatusTip('Exit The App')
menu_action1.triggered.connect(self.close_application)
self.statusBar()
# MenuBar
main_menu = self.menuBar()
file_menu = main_menu.addMenu('Options')
file_menu.addAction(menu_action1)
self.home()
def home(self):
# NewLibrary btn
new_lib_btn = QtGui.QPushButton("New Library", self)
new_lib_btn.setGeometry(QtCore.QRect(310, 180, 141, 41))
new_lib_btn.setStyleSheet("color: black;")
# AccessLibrary btn
access_lib_btn = QtGui.QPushButton("Access Library", self)
access_lib_btn.setGeometry(QtCore.QRect(310, 250, 141, 41))
access_lib_btn.setStyleSheet("color: black;")
# FindNewBooks btn
find_nbooks = QtGui.QPushButton("Find New Books*", self)
find_nbooks.setGeometry(QtCore.QRect(310, 320, 141, 41))
find_nbooks.setStyleSheet("color: black;")
self.mainLayout.addWidget(new_lib_btn)
self.mainLayout.addWidget(access_lib_btn)
self.mainLayout.addWidget(find_nbooks_btn)
self.show()
def close_application(self):
choice = QtGui.QMessageBox.question(self, 'Exit',
"Close the application?",
QtGui.QMessageBox.Yes | QtGui.QMessageBox.No)
if choice == QtGui.QMessageBox.Yes:
sys.exit()
else:
pass
def run():
app = QtGui.QApplication(sys.argv)
GUI = Window()
sys.exit(app.exec_())
run()
这是我的第二个窗口，我想用new_lib_btn打开的那个
newlib.pyclass NewLibrary (QtGui.QMainWindow):
def __init__(self):
super(NewLibrary, self).__init__()
self.resize(800,600)
self.setWindowTitle("New Library")
self.setStyleSheet("NewLibrary {border-image: url(wood.jpg);}")
# File Options
file_action1 = QtGui.QAction("New Library", self)
file_action1.setShortcut("Ctrl+N")
file_action1.setStatusTip("Creates a new library")
file_action2 = QtGui.QAction("Exit this!", self)
file_action2.setShortcut("Ctrl+Q")
file_action2.setStatusTip("Closes The App")
file_action2.triggered.connect(self.close_application)
#File Menu
main_menu = self.menuBar()
file_menu = main_menu.addMenu("File")
file_menu.addAction(file_action1)
file_menu.addAction(file_action2)
self.newLib()
self.newLib()
def newLib(self):
centralwidget = QtGui.QWidget(self)
self.mainLayout = QtGui.QVBoxLayout(centralwidget)
self.mainLayout.setAlignment(QtCore.Qt.AlignCenter)
#some useful buttons in the future
self.setCentralWidget(centralwidget)
self.show()
def close_application(self):
choice = QtGui.QMessageBox.question(self, 'Exit',
"Close the application?",
QtGui.QMessageBox.Yes | QtGui.QMessageBox.No)
if choice == QtGui.QMessageBox.Yes:
sys.exit()
else:
pass
def runNewLib():
app = QtGui.QApplication(sys.argv)
gui = NewLibrary()
sys.exit(app.exec_())
runNewLib()
我搜索了很多关于这个的信息，但是我不能理解其中一些与我的情况有点接近的信息，所以我请求帮助，这看起来很简单，但是我没有得到：/，我应该怎么做才能通过单击new_lib_btn打开第二个窗口？请帮忙。