Python PyQt4文本输入上的启用按钮，连接windows

我试图用python编写gui程序，但实际上没有gui编程经验。我开始学习tkinter，学习了我的程序所需的大部分知识，但我最近发现了PyQt和Qt designer，输出看起来好多了

在我的程序中，我想首先打开一个小窗口，提示用户输入一些信息（它将用于加载文件或创建新文件）。由于此信息至关重要，我不希望用户能够从第一个小窗口进入，而不输入它，因此我希望“确定”按钮最初被禁用，并在用户向字段输入信息时启用。我对此做了一次尝试（主要是在Qt Designer中创建，然后进行编辑），如下所示

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'open.ui'
#
# Created: Wed Jun 25 17:51:25 2014
#      by: PyQt4 UI code generator 4.10.3
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName(_fromUtf8("Form"))
        Form.setEnabled(True)
        Form.resize(308, 143)
        self.horizontalLayout = QtGui.QHBoxLayout(Form)
        self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
        self.verticalLayout = QtGui.QVBoxLayout()
        self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
        self.horizontalLayout_3 = QtGui.QHBoxLayout()
        self.horizontalLayout_3.setObjectName(_fromUtf8("horizontalLayout_3"))
        spacerItem = QtGui.QSpacerItem(40, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum)
        self.horizontalLayout_3.addItem(spacerItem)
        self.label = QtGui.QLabel(Form)
        self.label.setObjectName(_fromUtf8("label"))
        self.horizontalLayout_3.addWidget(self.label)
        spacerItem1 = QtGui.QSpacerItem(40, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum)
        self.horizontalLayout_3.addItem(spacerItem1)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        self.horizontalLayout_7 = QtGui.QHBoxLayout()
        self.horizontalLayout_7.setObjectName(_fromUtf8("horizontalLayout_7"))
        self.label_2 = QtGui.QLabel(Form)
        self.label_2.setObjectName(_fromUtf8("label_2"))
        self.horizontalLayout_7.addWidget(self.label_2)
        self.lineEdit = QtGui.QLineEdit(Form)
        self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
        self.horizontalLayout_7.addWidget(self.lineEdit)
        self.verticalLayout.addLayout(self.horizontalLayout_7)
        self.horizontalLayout_8 = QtGui.QHBoxLayout()
        self.horizontalLayout_8.setObjectName(_fromUtf8("horizontalLayout_8"))
        self.label_3 = QtGui.QLabel(Form)
        self.label_3.setObjectName(_fromUtf8("label_3"))
        self.horizontalLayout_8.addWidget(self.label_3)
        self.lineEdit_2 = QtGui.QLineEdit(Form)
        self.lineEdit_2.setObjectName(_fromUtf8("lineEdit_2"))
        self.horizontalLayout_8.addWidget(self.lineEdit_2)
        self.verticalLayout.addLayout(self.horizontalLayout_8)
        self.horizontalLayout_9 = QtGui.QHBoxLayout()
        self.horizontalLayout_9.setObjectName(_fromUtf8("horizontalLayout_9"))
        self.pushButton_2 = QtGui.QPushButton(Form)
        self.pushButton_2.setEnabled(False)
        self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))
        self.horizontalLayout_9.addWidget(self.pushButton_2)
        self.pushButton = QtGui.QPushButton(Form)
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.horizontalLayout_9.addWidget(self.pushButton)
        self.verticalLayout.addLayout(self.horizontalLayout_9)
        self.horizontalLayout.addLayout(self.verticalLayout)

        self.retranslateUi(Form)
        QtCore.QObject.connect(self.lineEdit_2, QtCore.SIGNAL(_fromUtf8("textEdited(QString)")), self.pushButton_2.setEnabled)
        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        Form.setWindowTitle(_translate("Form", "Form", None))
        self.label.setText(_translate("Form", "Please enter your name and student number:", None))
        self.label_2.setText(_translate("Form", "Name: ", None))
        self.label_3.setText(_translate("Form", "Student number: ", None))
        self.pushButton_2.setText(_translate("Form", "OK", None))
        self.pushButton.setText(_translate("Form", "Cancel", None))


if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    Form = QtGui.QWidget()
    ui = Ui_Form()
    ui.setupUi(Form)
    Form.show()
    sys.exit(app.exec_())

当我运行程序并在student number字段中键入某个内容时，会出现以下错误：

TypeError:QWidget.setEnabled（bool）：参数1具有意外的类型“str”

。我意识到问题在于它将字符串作为输入而不是布尔值，但我不知道如何修复它

我的问题的第二部分是，当用户在小窗口上单击“确定”时，我希望打开一个新的更大的窗口，该窗口的底部将有一个下一个选项，它将前进到另一个类似的窗口，但我不知道如何做到这一点（即链接窗口）

---

我如何做上面提到的事情？或者我应该坚持使用tkinter，即使在我看来它在美学上是低劣的。谢谢。

首先，您不应该在Qt Designer生成的UI文件中写入代码，因为下次写入时，pyuic工具会覆盖该文件。而是将其导入一个单独的文件中

需要从Ui_文件中删除此行：

QtCore.QObject.connect(self.lineEdit_2, QtCore.SIGNAL(_fromUtf8("textEdited(QString)")), self.pushButton_2.setEnabled)

例如：

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys
from PyQt4.QtCore import pyqtSlot
from PyQt4.QtGui import QWidget, QApplication
#assumes your file is called Ui_Main_Form.py from the pyuic tool
from Ui_Main_Form import Ui_Form


class MainForm(QWidget):
    def __init__(self, parent=None):
        #Initialise
        super(MainForm, self).__init__(parent)

        #Setup the UI
        self.ui = Ui_Form()
        self.ui.setupUi(self)

        #Now can do any modifications that cant be done in Qt Designer
        #Handle the textChanged signal for QLineEdit
        self.ui.lineEdit_2.textChanged.connect(self.line_edit_text_changed)


    @pyqtSlot(str)
    def line_edit_text_changed(self, text):
        if text:  # Check to see if text is filled in
            self.ui.pushButton_2.setEnabled(True)
        else:
            self.ui.pushButton_2.setEnabled(False)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    my_form = MainForm()
    my_form.show()
    sys.exit(app.exec_())

关于PyQt的信号和插槽机制，有一些有用的信息

有关如何从此窗口启动windows的信息，请参见：已接受答案

希望这能让你开始