PyQt6 uic 修改ui编译器代码生成 方便实现ui和逻辑代码分离提高效率_pyqt6 pyuic

使用PyQt6 uic 在终端生成py代码命令如下：

python -m PyQt6.uic.pyuic uifile.ui -o uifile.py

在pycharm的设置如下：

通过PyQt附带的designer设计好UI后，通过uic可以将ui文件转换为py文件, 生成py文件后类似下面的代码：

class Ui_Frame(object):
    def setupUi(self, Frame):
    # ...

ui类默认从object派生，如果直接使用该文件进行后续开发，需要将object替换为QWidget才能将界面显示出来，类似下面的代码

from PyQt6 import QtCore, QtGui, QtWidgets
from PyQt6.QtWidgets import QWidget
 
 
class Ui_Frame(QWidget):
    def __init__(self):
        super(Ui_Frame, self).__init__()
        self.setupUi(self)
 
    def setupUi(self, Frame):
        pass
        # ...

而且如果后期一旦界面更新，需要重新生成文件的时候内容会被覆盖，不利于界面和代码的分离，每次手动修改也麻烦，于是想到能不能修改编译器代码生成把ui代码类（Ui_Frame）的生成修改一下，改成上图所示的那样，业务逻辑在Ui_Frame的派生类进行处理，这样每次变更ui重新生成代码，对于业务逻辑处理的影响降到最小

通过翻看uic的源码 （site-packages\PyQt6\uic 路径下），可以实现上面的修改

我这边的实现修改了三个文件：

site-packages\PyQt6\uic\pyuic.py

site-packages\PyQt6\uic\compile_ui.py

site-packages\PyQt6\uic\Compiler\compiler.py

修改步骤如下：

1.pyuic.py文件的修改，修改 generate 函数，新增函数 generate_extend，使得可以生成派生类文件

def generate(ui_file, output, indent, execute):
    """ Generate the Python code. """
 
    from .compile_ui import compileUi
 
    if output == '-':
        import io
 
        pyfile = io.TextIOWrapper(sys.stdout.buffer, encoding='utf8')
        needs_close = False
    else:
        pyfile = open(output, 'wt', encoding='utf8')
        needs_close = True
 
    winfo = compileUi(ui_file, pyfile, execute, indent)     # 修改1
 
    if needs_close:
        pyfile.close()
 
    # 生成派生类
    generate_extend(output, winfo)    # 新增 2
 
 
# by qifa（新增函数）
def generate_extend(output: str, winfo: dict) -> None:
    import os
    filename = output[:output.rfind('.')]
    class_name = 'Ui_' + filename + 'extend'
    output_file = filename + 'extend.py'
    if os.path.exists(output_file):
        return  # 如果文件已经存在，不再生成
    from PyQt6.uic.Compiler.indenter import createCodeIndenter, getIndenter
    output_stream = open(output_file, 'wt', encoding='utf8')
    createCodeIndenter(output_stream)
    indenter = getIndenter()
    indenter.level = 0
 
    # 生成代码
    indenter.write("from %s import %s" % (filename, winfo['uiclass']))
    indenter.write("")
    indenter.write("")
    indenter.write("class %s(%s):" %(class_name, winfo['uiclass']))
    indenter.indent()
    indenter.write("def __init__(self):")
    indenter.indent()
    indenter.write("super().__init__()")
    indenter.write("pass")
 
    output_stream.close()

派生类最终生成的示例代码如下：

from ebookdownloadmain import Ui_Frame
 
 
class Ui_ebookdownloadmainextend(Ui_Frame):
    def __init__(self):
        super().__init__()
        pass

2. 修改 compile_ui.py 文件，修改compileUi函数，返回一个字典信息

def compileUi(uifile, pyfile, execute=False, indent=4):
    """compileUi(uifile, pyfile, execute=False, indent=4)
    Creates a Python module from a Qt Designer .ui file.
    
    uifile is a file name or file-like object containing the .ui file.
    pyfile is the file-like object to which the Python code will be written to.
    execute is optionally set to generate extra Python code that allows the
    code to be run as a standalone application.  The default is False.
    indent is the optional indentation width using spaces.  If it is 0 then a
    tab is used.  The default is 4.
    """
 
    from PyQt6.QtCore import PYQT_VERSION_STR
 
    try:
        uifname = uifile.name
    except AttributeError:
        uifname = uifile
 
    indenter.indentwidth = indent
 
    pyfile.write(_header.format(uifname, PYQT_VERSION_STR))
 
    winfo = compiler.UICompiler().compileUi(uifile, pyfile)
 
    if execute:
        indenter.write_code(_display_code % winfo)
        
    return winfo    # 修改 返回字典信息

3. 修改Compiler\compiler.py文件，这里才是修改ui文件生成py文件的地方，修改UICompiler类的createToplevelWidget成员函数，代码如下：

class UICompiler(UIParser):
    def __init__(self):
        UIParser.__init__(self, qtproxies.QtCore, qtproxies.QtGui,
                qtproxies.QtWidgets, CompilerCreatorPolicy())
 
    def reset(self):
        qtproxies.i18n_strings = []
        UIParser.reset(self)
 
    def setContext(self, context):
        qtproxies.i18n_context = context
    
    # 修改
    def createToplevelWidget(self, classname, widgetname):
        indenter = getIndenter()
        indenter.level = 0
 
        indenter.write("from PyQt6 import QtCore, QtGui, QtWidgets")
        indenter.write("from PyQt6.QtWidgets import QWidget")
        indenter.write("")
 
        indenter.write("")
        indenter.write("class Ui_%s(QWidget):" % self.uiname)
        indenter.indent()
        indenter.write("def __init__(self):")
        indenter.indent()
        indenter.write("super(Ui_%s, self).__init__()" % self.uiname)
        indenter.write("self.setupUi(self)")
        indenter.dedent()
        indenter.write("")
        indenter.write("def setupUi(self, %s):" % widgetname)
        indenter.indent()
        w = self.factory.createQtObject(classname, widgetname,
                is_attribute=False, no_instantiation=True)
        w.baseclass = classname
        w.uiclass = "Ui_%s" % self.uiname
        return w
    
    
    # ...

最终效果示例效果：

from PyQt6 import QtCore, QtGui, QtWidgets
from PyQt6.QtWidgets import QWidget
 
 
class Ui_Frame(QWidget):
    def __init__(self):
        super(Ui_Frame, self).__init__()
        self.setupUi(self)
 
    def setupUi(self, Frame):
        pass
        # ...
 
 
 
from ebookdownloadmain import Ui_Frame
 
 
class Ui_ebookdownloadmainextend(Ui_Frame):
    def __init__(self):
        super().__init__()
        pass
 
 
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ui = Ui_ebookdownloadmainextend()
    ui.show()
    sys.exit(app.exec())

后续只需要在 Ui_ebookdownloadmainextend 类写业务逻辑即可，代码的智能提示也方便，原ui生成的py文件不用管它，界面更新了重新生成即可

修改的几个文件已经打包好了，点这里下载