從PyQt的主窗口中打開Ui_Form

Question

好吧，這是困擾我幾天的問題。 我正在嘗試從MainWindow打開Ui_form。 出於某種原因，子窗口會立即打開和關閉。

class Ui_MainWindow(QtGui.QMainWindow):
    def __init__(self,parent=None):
        QtGui.QMainWindow.__init__(self,parent)

    def setupUi(self, MainWindow):
        # Some Gui Code
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(406, 234)
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.verticalLayout = QtGui.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
        self.horizontalLayout = QtGui.QHBoxLayout()
        self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
        self.listView = QtGui.QListView(self.centralwidget)
        self.listView.setObjectName(_fromUtf8("listView"))
        self.horizontalLayout.addWidget(self.listView)
        self.pushButton = QtGui.QPushButton(self.centralwidget)
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.horizontalLayout.addWidget(self.pushButton)
        self.verticalLayout.addLayout(self.horizontalLayout)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtGui.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 406, 21))
        self.menubar.setObjectName(_fromUtf8("menubar"))
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtGui.QStatusBar(MainWindow)
        self.statusbar.setObjectName(_fromUtf8("statusbar"))
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QObject.connect(self.pushButton , QtCore.SIGNAL("clicked()") , self.NewLog)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))
        self.pushButton.setText(QtGui.QApplication.translate("MainWindow", "New Log", None, QtGui.QApplication.UnicodeUTF8))



    def NewLog(self):
        app = QtGui.QWidget()
        myapp = new_application_log.Ui_Form()
        myapp.setupUi(app)
        myapp.show()
        #app.exec_()

class Ui_Form(QtGui.QWidget):
    def __init__(self,parent = None):
        QtGui.QWidget.__init__(self,parent)

    def setupUi(self, Form):
        # Some Gui Code.
        Form.setObjectName(_fromUtf8("Form"))
        Form.resize(312, 269)
        self.verticalLayout = QtGui.QVBoxLayout(Form)
        self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
        self.listView = QtGui.QListView(Form)
        self.listView.setObjectName(_fromUtf8("listView"))
        self.verticalLayout.addWidget(self.listView)

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

    def retranslateUi(self, Form):
        Form.setWindowTitle(QtGui.QApplication.translate("Form", "Form", None, QtGui.QApplication.UnicodeUTF8))

def main():
    app = QtGui.QApplication(sys.argv)
    MainWindow = QtGui.QMainWindow() # <-- Instantiate QMainWindow object.
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    app.exec_()

Answer 1

最簡單的解決方案是將newLog更改為此

def NewLog(self):
    app = QtGui.QWidget()
    self.form = Ui_Form()
    self.form.setupUi(app)
    self.form.show()

與self.form在定義的Ui_mainwindow類

class Ui_MainWindow(QtGui.QMainWindow):
    def __init__(self,parent=None):
        QtGui.QMainWindow.__init__(self,parent)

        self.form = None

在您的代碼中，您要在newLog函數內部定義myapp = Ui_form()變量，然后該變量超出范圍並在函數退出時立即刪除。 如果你以某種方式包括的功能有部分屏蔽結束你就不會在技術上需要把self.form在__init__()的Ui_mainWindow 。 舉例來說，假設您有一個要返回的表單，需要按一下按鈕才能關閉，然后可以按原樣進行操作，但是由於您只是對小部件進行show() ，因此需要將其保留在外部功能的

---

編輯：例如，由於上述原因，此代碼可以正常運行-您必須在函數退出之前單擊按鈕

def NewLog(self, text='I am open!', buttons=QtGui.QMessageBox.Ok):
   errorBox = QtGui.QMessageBox()
   errorBox.setText(text)
   errorBox.setStandardButtons(buttons)
   return errorBox.exec_()