单击主窗口PyQt5 Python中的按钮时打开窗口

Question

我已经通过了各种类似的帖子，这些帖子都有类似的问题，我也尝试了答案，但对我来说不起作用。这就是我的问题-

我有两个窗口-TestBox和MailBox，当我单击TestBox按钮和输入路径参数时，它必须打开邮箱窗口，当我关闭邮箱窗口时，这个新窗口邮箱将再次向TestBox发送修改路径

1. 我在PyQt5工具中创建了两个窗口，并创建了ui文件，然后使用-Python-m PyQt5.uic.pyuic testboxui.ui-o testboxui.py转换为Python文件

2. 我没有接触testboxui.py或mailboxui.py文件，因为它们通过重新转换不断更改任何修改。相反，我创建了另一个文件TestBox.py和MailBox.py来导入和写入函数

以下是可生成的最小代码-

TestBox.py[主应用程序代码]

import os,sys
from PyQt5 import QtWidgets, QtGui, QtCore
from testboxui import Ui_TestBox
from MailBox import AppWindow_MailList

app = QtWidgets.QApplication(sys.argv)

class AppWindow_MainBox(QtWidgets.QMainWindow):
    def __init__(self):
        super(AppWindow_MainBox, self).__init__()
        self.ui = Ui_TestBox()
        self.ui.setupUi(self)
        self.ui.openbox.clicked.connect(self.fcn_maillist)

    def fcn_maillist(self):
        GetPath = os.getcwd()
        dialog  = AppWindow_MailList(self,GetPath)
        if dialog.exec_() == AppWindow_MailList.Accepted:
            GetPath = dialog.get_output()

def main():
    app = QtWidgets.QApplication(sys.argv)
    application = AppWindow_MainBox()
    application.show()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

testboxui.py[由PyQt5工具直接从UI文件生成]

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_TestBox(object):
    def setupUi(self, TestBox):
        TestBox.setObjectName("TestBox")
        TestBox.resize(647, 279)
        self.centralwidget = QtWidgets.QWidget(TestBox)
        self.centralwidget.setObjectName("centralwidget")
        self.openbox = QtWidgets.QPushButton(self.centralwidget)
        self.openbox.setGeometry(QtCore.QRect(210, 60, 231, 91))
        self.openbox.setObjectName("openbox")
        TestBox.setCentralWidget(self.centralwidget)

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

    def retranslateUi(self, TestBox):
        _translate = QtCore.QCoreApplication.translate
        TestBox.setWindowTitle(_translate("TestBox", "TestBox"))
        self.openbox.setText(_translate("TestBox", "Click Here \n""To Open Another Window"))

MailBox.py[子应用程序代码]

import os,sys
from PyQt5 import QtWidgets, QtGui, QtCore
from maillistui import Ui_MailList

app = QtWidgets.QApplication(sys.argv)

class AppWindow_MailList(QtWidgets.QMainWindow):
    def __init__(self,RcvPath=''):
        super(AppWindow_MailList, self).__init__()
        self.ui = Ui_MailList()
        self.ui.setupUi(self)
        self.init_fcn(RcvPath)

    def init_fcn(self,RcvPath):
        self.ui.browse.clicked.connect(self.browse_fcn) 
        if not RcvPath:
            self.RcvPath = os.getcwd()
        else:
            self.RcvPath = RcvPath
        self.ui.path.setText(self.RcvPath)

    def closeEvent(self, event):
        event.accept()

    def get_output(self):
        return os.path.join(self.RcvPath,'TestFolder')

    def browse_fcn(self):
        pass

def main():
    app = QtWidgets.QApplication(sys.argv)
    application = AppWindow_MailList()
    application.show()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

maillistui.py-[由PyQt5直接从ui文件生成]

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MailList(object):
    def setupUi(self, MailList):
        MailList.setObjectName("MailList")
        MailList.resize(647, 279)
        self.centralwidget = QtWidgets.QWidget(MailList)
        self.centralwidget.setObjectName("centralwidget")
        self.path = QtWidgets.QLineEdit(self.centralwidget)
        self.path.setGeometry(QtCore.QRect(50, 30, 511, 41))
        self.path.setObjectName("path")
        self.browse = QtWidgets.QPushButton(self.centralwidget)
        self.browse.setGeometry(QtCore.QRect(450, 90, 112, 41))
        self.browse.setObjectName("browse")
        MailList.setCentralWidget(self.centralwidget)

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

    def retranslateUi(self, MailList):
        _translate = QtCore.QCoreApplication.translate
        MailList.setWindowTitle(_translate("MailList", "MailList"))
        self.browse.setText(_translate("MailList", "Browse"))

以前我使用qtwidts.QDialog创建PyQt5对话框，我可以在qtwidts.QApplication中轻松加载该对话框。但这里两者都是QApplication（QMainWindow），但很难在ui中调用ui

我在这里做错什么了吗

Answer 1

只应创建一个QApplication，对于不必要创建的每个脚本，请删除以下代码：

```
from MailBox import AppWindow_MailList

app = QtWidgets.QApplication(sys.argv) # < - delete this line

class AppWindow_MainBox(QtWidgets.QMainWindow):
```

```
from maillistui import Ui_MailList

app = QtWidgets.QApplication(sys.argv) # < - delete this line

class AppWindow_MailList(QtWidgets.QMainWindow):
```

纠正上述错误后，会出现另一个错误，但对于此Python指出了错误消息，在许多IDE中，它们不处理Qt错误，因此我建议您在控制台中运行它，您将得到以下错误消息：

Traceback (most recent call last):
  File "TextBox.py", line 16, in fcn_maillist
    dialog  = AppWindow_MailList(self,GetPath)
TypeError: __init__() takes from 1 to 2 positional arguments but 3 were given

这清楚地表明AppWindow_MailList类接受单个参数（RcvPath），但您将其传递给2。我不知道这是否是一个打字错误，或者您不知道“self”在python中的用法（如果是后者，建议阅读What is the purpose of the word 'self'?）

class AppWindow_MailList(QtWidgets.QMainWindow):
    def __init__(self,RcvPath=''):
        super(AppWindow_MailList, self).__init__()

即使解决了这个错误，还有另一个问题，AppWindow\u MailList是一个QMainWindow，因此它没有任何exec\u（）方法，似乎您试图使用一些使用QDialog的帖子的代码，但不理解解决方案的逻辑

通常，每个小部件都有一个用途：

• QWidget是一个通用的小部件，可以用作构建任何其他类型的小部件或容器的基础，类似于html中的div

• QDialog是一个小部件，它的目的是向用户请求信息，因此exec_（）方法返回阻塞eventloop的请求的状态（如果它被接受或拒绝）

• QMainWindow的目的是提供一个主窗口，因为它包含工具栏、状态栏、菜单栏、dockwidets等。

因此，为了实现您的目标，您必须选择正确的元素，考虑到我将重新构造您的应用程序

mailbox.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Dialog</class>
 <widget class="QDialog" name="Dialog">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>461</width>
    <height>300</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Dialog</string>
  </property>
  <layout class="QGridLayout" name="gridLayout">
   <item row="0" column="0" colspan="2">
    <widget class="QLineEdit" name="mail_le">
     <property name="minimumSize">
      <size>
       <width>0</width>
       <height>49</height>
      </size>
     </property>
     <property name="maximumSize">
      <size>
       <width>16777215</width>
       <height>40</height>
      </size>
     </property>
    </widget>
   </item>
   <item row="1" column="0">
    <spacer name="horizontalSpacer">
     <property name="orientation">
      <enum>Qt::Horizontal</enum>
     </property>
     <property name="sizeHint" stdset="0">
      <size>
       <width>324</width>
       <height>20</height>
      </size>
     </property>
    </spacer>
   </item>
   <item row="1" column="1">
    <widget class="QPushButton" name="browse_btn">
     <property name="minimumSize">
      <size>
       <width>110</width>
       <height>40</height>
      </size>
     </property>
     <property name="maximumSize">
      <size>
       <width>16777215</width>
       <height>110</height>
      </size>
     </property>
     <property name="text">
      <string>Browse</string>
     </property>
    </widget>
   </item>
   <item row="2" column="1">
    <spacer name="verticalSpacer">
     <property name="orientation">
      <enum>Qt::Vertical</enum>
     </property>
     <property name="sizeHint" stdset="0">
      <size>
       <width>20</width>
       <height>178</height>
      </size>
     </property>
    </spacer>
   </item>
  </layout>
 </widget>
 <resources/>
 <connections/>
</ui>

testbox.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>800</width>
    <height>600</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="1">
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>213</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="1" column="0">
     <spacer name="horizontalSpacer">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>267</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="1" column="1">
     <widget class="QPushButton" name="open_btn">
      <property name="minimumSize">
       <size>
        <width>230</width>
        <height>90</height>
       </size>
      </property>
      <property name="maximumSize">
       <size>
        <width>230</width>
        <height>90</height>
       </size>
      </property>
      <property name="text">
       <string>Click Here 
To Open Another Window</string>
      </property>
     </widget>
    </item>
    <item row="1" column="2">
     <spacer name="horizontalSpacer_2">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>267</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="2" column="1">
     <spacer name="verticalSpacer_2">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>212</height>
       </size>
      </property>
     </spacer>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>800</width>
     <height>26</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

python -m PyQt5.uic.pyuic mailbox.ui -o mailbox_ui.py -x 
python -m PyQt5.uic.pyuic testbox.ui -o testbox_ui.py -x 

邮箱.py

import os
from PyQt5 import QtCore, QtGui, QtWidgets

from mailbox_ui import Ui_Dialog


class MailBox(QtWidgets.QDialog):
    def __init__(self, mail="", parent=None):
        super().__init__(parent)

        self.ui = Ui_Dialog()
        self.ui.setupUi(self)

        self.ui.browse_btn.clicked.connect(self.accept)

        if mail:
            self.ui.mail_le.setText(mail)
        else:
            self.ui.mail_le.setText(os.getcwd())

    def mail(self):
        return self.ui.mail_le.text()


def main():
    import sys

    app = QtWidgets.QApplication(sys.argv)
    w = MailBox()
    w.show()
    sys.exit(app.exec_())


if __name__ == "__main__":
    main()

testbox.py

import os
from PyQt5 import QtCore, QtGui, QtWidgets

from mailbox import MailBox
from testbox_ui import Ui_MainWindow


class TestBox(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)

        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        self.ui.open_btn.clicked.connect(self.open_window)

    @QtCore.pyqtSlot()
    def open_window(self):
        dialog = MailBox()
        if dialog.exec_() == QtWidgets.QDialog.Accepted:
            path = dialog.mail()
            print(path)


def main():
    import sys

    app = QtWidgets.QApplication(sys.argv)
    w = TestBox()
    w.show()
    sys.exit(app.exec_())


if __name__ == "__main__":
    main()

├── mailbox.py
├── mailbox.ui
├── mailbox_ui.py
├── testbox.py
├── testbox.ui
└── testbox_ui.py