实战使用PyQT5开发一个B站缓存合成器

先来看看在pyqt5 designer中拖拽生成的界面：

下面我直接给出上面这个界面的ui文件的代码：

<?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>955</width>
    <height>657</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string notr="true">阿甘·B站缓存合成器</string>
  </property>
  <layout class="QGridLayout" name="gridLayout_2">
   <item row="0" column="0">
    <layout class="QGridLayout" name="gridLayout">
     <property name="sizeConstraint">
      <enum>QLayout::SetNoConstraint</enum>
     </property>
     <item row="0" column="0">
      <widget class="QLabel" name="cache_path_label">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
         <horstretch>0</horstretch>
         <verstretch>50</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <weight>50</weight>
         <bold>false</bold>
        </font>
       </property>
       <property name="text">
        <string notr="true">缓存路径</string>
       </property>
      </widget>
     </item>
     <item row="2" column="2">
      <widget class="QPushButton" name="scan_button">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="text">
        <string notr="true">扫描</string>
       </property>
      </widget>
     </item>
     <item row="2" column="3">
      <widget class="QPushButton" name="composer_button">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="text">
        <string notr="true">开始合成</string>
       </property>
      </widget>
     </item>
     <item row="2" column="0" colspan="2">
      <widget class="QPushButton" name="go_to_website_button">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="text">
        <string notr="true">点我下载最新版本,网站打不开的话需要你懂的</string>
       </property>
      </widget>
     </item>
     <item row="0" column="1" colspan="3">
      <widget class="QPlainTextEdit" name="cache_path_text_edit">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>50</horstretch>
         <verstretch>99</verstretch>
        </sizepolicy>
       </property>
      </widget>
     </item>
     <item row="1" column="0" colspan="4">
      <widget class="QListWidget" name="listWidget">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
      </widget>
     </item>
    </layout>
   </item>
  </layout>
 </widget>
 <resources/>
 <connections/>
</ui>

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<?xml version="1.0" encoding="UTF-8"?>

<class>Dialog</class>

<rect>

</rect>

</property>

<string notr="true">阿甘·B站缓存合成器</string>

</property>

<enum>QLayout::SetNoConstraint</enum>

</property>

</sizepolicy>

</property>

<font>

<bold>false</bold>

</font>

</property>

</property>

</widget>

</item>

</sizepolicy>

</property>

</property>

</widget>

</item>

</sizepolicy>

</property>

</property>

</widget>

</item>

</sizepolicy>

</property>

<string notr="true">点我下载最新版本,网站打不开的话需要你懂的</string>

</property>

</widget>

</item>

</sizepolicy>

</property>

</widget>

</item>

</sizepolicy>

</property>

</widget>

</item>

</layout>

</item>

</layout>

</widget>

</ui>

然后是上面这个ui文件转换成的python代码，注意下面转换完的py代码做了很多修改，不然不能实现功能的哈，

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

# Form implementation generated from reading ui file '.\阿甘·B站缓存合成器.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtGui import QIcon,QPixmap
from PyQt5.QtWidgets import QListWidget, QCheckBox,QListWidgetItem
from PyQt5.QtCore import Qt
import ctypes
ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID("Dialog")

class FilteredList(QListWidget):
    #继承自列表控件
    def __init__(self, parent=None):
        super().__init__(parent)
        self.selectAll_ch = QCheckBox("全选(selectAll)")
        self.selectAll_ch.setCheckState(Qt.Checked)
        self.selectAll_ch.stateChanged[int].connect(self.on_selectAll)#
        item = QListWidgetItem(self)
        self.setItemWidget(item, self.selectAll_ch )#列表控件的项设为 QCheckBox
        self.boxes = set()
        self.videos_title_dict = {}

def insert_item(self,videos_list):
        if not self.boxes:
            for _, text in enumerate(videos_list):
                ch = QCheckBox(text)
                ch.setCheckState(Qt.Unchecked)
                ch.stateChanged[int].connect(self.on_stateChanged)
                #item.setCheckState(Qt.Unchecked)#
                item = QListWidgetItem(self)
                self.setItemWidget(item, ch)
                self.boxes.add(ch)
                self.videos_title_dict[text]=ch

def on_selectAll(self,state):
        if state == 2:
            for ch in self.boxes:
                ch.setCheckState(2)
        if state == 0:
            for ch in self.boxes:
                ch.setCheckState(0)

def on_stateChanged(self,state):
        ch = self.sender()
        if state:
            if len([ch for ch in self.boxes if ch.checkState()]) == self.count()-1:
        #0 不选中， 1 部分选中，2 全选中 #Qt.Unchecked #Qt.PartiallyChecked #Qt.Checked
                self.selectAll_ch.setCheckState(2)
            else:
                self.selectAll_ch.setCheckState(1)
        else:
            if len([k for k in self.boxes if k.checkState()]):
                self.selectAll_ch.setCheckState(1)
            else:
                self.selectAll_ch.setCheckState(0)
                
    def keyPressEvent(self, event):
        #Ctrl+A 全选
        if event.modifiers() & Qt.ControlModifier and event.key()==Qt.Key_A:
            self.selectAll_ch.setCheckState(2)

class Ui_Dialog(object):
    def get_icon(self):
        import base64
        icon_bytes = b'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'
        icon_img = base64.b64decode(icon_bytes)  # 解码
        icon_pixmap = QPixmap()  # 新建QPixmap对象
        icon_pixmap.loadFromData(icon_img)  # 往QPixmap中写入数据
        return icon_pixmap

def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(1049, 633)
        Dialog.setWindowTitle("阿甘·B站缓存合成器 - V1.0.0")
        Dialog.setWindowIcon(QIcon(self.get_icon()))
        self.gridLayout_2 = QtWidgets.QGridLayout(Dialog)
        self.gridLayout_2.setObjectName("gridLayout_2")
        self.gridLayout = QtWidgets.QGridLayout()
        self.gridLayout.setSizeConstraint(QtWidgets.QLayout.SetNoConstraint)
        self.gridLayout.setObjectName("gridLayout")
        self.cache_path_label = QtWidgets.QLabel(Dialog)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(50)
        sizePolicy.setHeightForWidth(self.cache_path_label.sizePolicy().hasHeightForWidth())
        self.cache_path_label.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setBold(False)
        font.setWeight(50)
        self.cache_path_label.setFont(font)
        self.cache_path_label.setText("缓存路径")
        self.cache_path_label.setObjectName("cache_path_label")
        self.gridLayout.addWidget(self.cache_path_label, 0, 0, 1, 1)
        self.scan_button = QtWidgets.QPushButton(Dialog)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.scan_button.sizePolicy().hasHeightForWidth())
        self.scan_button.setSizePolicy(sizePolicy)
        self.scan_button.setText("扫描")
        self.scan_button.setObjectName("scan_button")
        self.scan_button.clicked.connect(Dialog.scan_videos_generate_list)
        self.gridLayout.addWidget(self.scan_button, 2, 2, 1, 1)
        self.composer_button = QtWidgets.QPushButton(Dialog)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.composer_button.sizePolicy().hasHeightForWidth())
        self.composer_button.setSizePolicy(sizePolicy)
        self.composer_button.setText("开始合成")
        self.composer_button.setObjectName("composer_button")
        self.composer_button.clicked.connect(Dialog.videos_composer)
        self.gridLayout.addWidget(self.composer_button, 2, 3, 1, 1)
        self.listWidget = FilteredList()
        self.gridLayout.addWidget(self.listWidget, 1, 0, 1, 4)
        self.go_to_website_button = QtWidgets.QPushButton(Dialog)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.go_to_website_button.sizePolicy().hasHeightForWidth())
        self.go_to_website_button.setSizePolicy(sizePolicy)
        self.go_to_website_button.setText("点我下载最新版本,网站打不开的话需要你懂的")
        self.go_to_website_button.setObjectName("go_to_website_button")
        self.go_to_website_button.clicked.connect(lambda: QtGui.QDesktopServices.openUrl(QtCore.QUrl('http://www.sharpgan.com/a-gan-bilibili-video-composer')))
        self.gridLayout.addWidget(self.go_to_website_button, 2, 0, 1, 2)
        self.cache_path_text_edit = QtWidgets.QPlainTextEdit(Dialog)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(50)
        sizePolicy.setVerticalStretch(99)
        sizePolicy.setHeightForWidth(self.cache_path_text_edit.sizePolicy().hasHeightForWidth())
        self.cache_path_text_edit.setSizePolicy(sizePolicy)
        self.cache_path_text_edit.setPlaceholderText("请输入B站客户端的设置-下载设置-缓存目录中的路径")
        self.cache_path_text_edit.setObjectName("cache_path_text_edit")
        self.gridLayout.addWidget(self.cache_path_text_edit, 0, 1, 1, 3)
        self.gridLayout_2.addLayout(self.gridLayout, 0, 0, 1, 1)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

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

# Form implementation generated from reading ui file '.\阿甘·B站缓存合成器.ui'

# Created by: PyQt5 UI code generator 5.15.4

# WARNING: Any manual changes made to this file will be lost when pyuic5 is

# run again. Do not edit this file unless you know what you are doing.

from PyQt5 import QtCore, QtGui, QtWidgets

from PyQt5.QtGui import QIcon,QPixmap

from PyQt5.QtWidgets import QListWidget, QCheckBox,QListWidgetItem

from PyQt5.QtCore import Qt

import ctypes

ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID("Dialog")

class FilteredList(QListWidget):

#继承自列表控件

def __init__(self, parent=None):

super().__init__(parent)

self.selectAll_ch = QCheckBox("全选(selectAll)")

self.selectAll_ch.setCheckState(Qt.Checked)

self.selectAll_ch.stateChanged[int].connect(self.on_selectAll)#

item = QListWidgetItem(self)

self.setItemWidget(item, self.selectAll_ch )#列表控件的项设为 QCheckBox

self.boxes = set()

self.videos_title_dict = {}

def insert_item(self,videos_list):

if not self.boxes:

for _, text in enumerate(videos_list):

ch = QCheckBox(text)

ch.setCheckState(Qt.Unchecked)

ch.stateChanged[int].connect(self.on_stateChanged)

#item.setCheckState(Qt.Unchecked)#

item = QListWidgetItem(self)

self.setItemWidget(item, ch)

self.boxes.add(ch)

self.videos_title_dict[text]=ch

def on_selectAll(self,state):

if state == 2:

for ch in self.boxes:

ch.setCheckState(2)

if state == 0:

for ch in self.boxes:

ch.setCheckState(0)

def on_stateChanged(self,state):

ch = self.sender()

if state:

if len([ch for ch in self.boxes if ch.checkState()]) == self.count()-1:

#0 不选中， 1 部分选中，2 全选中 #Qt.Unchecked #Qt.PartiallyChecked #Qt.Checked

self.selectAll_ch.setCheckState(2)

else:

self.selectAll_ch.setCheckState(1)

else:

if len([k for k in self.boxes if k.checkState()]):

self.selectAll_ch.setCheckState(1)

else:

self.selectAll_ch.setCheckState(0)

def keyPressEvent(self, event):

#Ctrl+A 全选

if event.modifiers() & Qt.ControlModifier and event.key()==Qt.Key_A:

self.selectAll_ch.setCheckState(2)

class Ui_Dialog(object):

def get_icon(self):

import base64

icon_bytes = b'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'

icon_img = base64.b64decode(icon_bytes) # 解码

icon_pixmap = QPixmap() # 新建QPixmap对象

icon_pixmap.loadFromData(icon_img) # 往QPixmap中写入数据

return icon_pixmap

def setupUi(self, Dialog):

Dialog.setObjectName("Dialog")

Dialog.resize(1049, 633)

Dialog.setWindowTitle("阿甘·B站缓存合成器 - V1.0.0")

Dialog.setWindowIcon(QIcon(self.get_icon()))

self.gridLayout_2 = QtWidgets.QGridLayout(Dialog)

self.gridLayout_2.setObjectName("gridLayout_2")

self.gridLayout = QtWidgets.QGridLayout()

self.gridLayout.setSizeConstraint(QtWidgets.QLayout.SetNoConstraint)

self.gridLayout.setObjectName("gridLayout")

self.cache_path_label = QtWidgets.QLabel(Dialog)

sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)

sizePolicy.setHorizontalStretch(0)

sizePolicy.setVerticalStretch(50)

sizePolicy.setHeightForWidth(self.cache_path_label.sizePolicy().hasHeightForWidth())

self.cache_path_label.setSizePolicy(sizePolicy)

font = QtGui.QFont()

font.setBold(False)

font.setWeight(50)

self.cache_path_label.setFont(font)

self.cache_path_label.setText("缓存路径")

self.cache_path_label.setObjectName("cache_path_label")

self.gridLayout.addWidget(self.cache_path_label, 0, 0, 1, 1)

self.scan_button = QtWidgets.QPushButton(Dialog)

sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)

sizePolicy.setHorizontalStretch(0)

sizePolicy.setVerticalStretch(0)

sizePolicy.setHeightForWidth(self.scan_button.sizePolicy().hasHeightForWidth())

self.scan_button.setSizePolicy(sizePolicy)

self.scan_button.setText("扫描")

self.scan_button.setObjectName("scan_button")

self.scan_button.clicked.connect(Dialog.scan_videos_generate_list)

self.gridLayout.addWidget(self.scan_button, 2, 2, 1, 1)

self.composer_button = QtWidgets.QPushButton(Dialog)

sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)

sizePolicy.setHorizontalStretch(0)

sizePolicy.setVerticalStretch(0)

sizePolicy.setHeightForWidth(self.composer_button.sizePolicy().hasHeightForWidth())

self.composer_button.setSizePolicy(sizePolicy)

self.composer_button.setText("开始合成")

self.composer_button.setObjectName("composer_button")

self.composer_button.clicked.connect(Dialog.videos_composer)

self.gridLayout.addWidget(self.composer_button, 2, 3, 1, 1)

self.listWidget = FilteredList()

self.gridLayout.addWidget(self.listWidget, 1, 0, 1, 4)

self.go_to_website_button = QtWidgets.QPushButton(Dialog)

sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)

sizePolicy.setHorizontalStretch(0)

sizePolicy.setVerticalStretch(0)

sizePolicy.setHeightForWidth(self.go_to_website_button.sizePolicy().hasHeightForWidth())

self.go_to_website_button.setSizePolicy(sizePolicy)

self.go_to_website_button.setText("点我下载最新版本,网站打不开的话需要你懂的")

self.go_to_website_button.setObjectName("go_to_website_button")

self.go_to_website_button.clicked.connect(lambda: QtGui.QDesktopServices.openUrl(QtCore.QUrl('http://www.sharpgan.com/a-gan-bilibili-video-composer')))