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Daniel's questions

Martin Hope
Daniel
Asked: 2025-01-14 20:43:14 +0800 CST
  • 4

我想让我的项目保持秩序，因此我考虑将属性从“main.py”文件移至另一个名为“CustomVariables.py”的文件。但现在我收到“TypeError：无法读取未定义的属性‘loaderSource’”。当您取消注释下面代码中的注释时，它可以正常工作，但是我不想在“BG”类中声明属性。有人可以指导我如何正确设置它吗？

自定义变量.py

from PySide6.QtCore import QObject, Property, Signal

class CustomVariables(QObject):
    def __init__(self):
        QObject.__init__(self)
        self.loaderSource = 'PageWork.qml'

    def get_loaderSource(self):
        return self._loaderSource
    
    def set_loaderSource(self, new_loaderSource):
        self._loaderSource = new_loaderSource
        self.loaderSourceChanged.emit()
        
    loaderSourceChanged = Signal()
    
    loaderSource = Property(str, get_loaderSource, set_loaderSource, notify=loaderSourceChanged)

主程序

import sys
from pathlib import Path

from PySide6.QtGui import QGuiApplication
from PySide6.QtQml import QQmlApplicationEngine
from PySide6.QtCore import QObject, Property, Signal

from CustomVariables import CustomVariables



class BG(QObject):
    def __init__(self):
        QObject.__init__(self)
        # self.loaderSource = 'PageWork.qml'

    cv = CustomVariables()

    # def get_loaderSource(self):
    #     return self._loaderSource
    # def set_loaderSource(self, new_loaderSource):
    #     self._loaderSource = new_loaderSource
    #     self.loaderSourceChanged.emit()
    # loaderSourceChanged = Signal()
    # loaderSource = Property(str, get_loaderSource, set_loaderSource, notify=loaderSourceChanged)


if __name__ == "__main__":
    app = QGuiApplication(sys.argv)
    engine = QQmlApplicationEngine()

    background = BG()
    engine.rootContext().setContextProperty("bg", background)

    qml_file = Path(__file__).resolve().parent / "main.qml"
    engine.load(qml_file)
    if not engine.rootObjects():
        sys.exit(-1)
    sys.exit(app.exec())

主文件

import QtQuick.Controls.FluentWinUI3
import QtQuick


Window {
    id: root
    width: 1280
    height: 720
    visible: true

    Loader {
        id: projectLoader
        anchors.fill: parent
        asynchronous: true
        source: bg.cv.loaderSource
        //source: bg.loaderSource
    }
}

我也尝试在“init”中声明“cv”：

self.cv = CustomVariables()

但仍然没有成功

python