python - 将 QObject 和 QThread 多类化在一起

问题描述

我正在尝试创建一组状态机来处理我的 PyQt 项目中的不同任务，在处理需要在单个线程上处理图形的方式的过程中，我创建了两种类型的状态机，StateMachine其中必须继承QObjectand ThreadedStateMachine，为了避免重复代码，我已经从StateMachineand继承了QThread。

这是我复制问题的最低限度完整代码：

from PyQt5.QtCore import QObject, QThread


class StateMachine(QObject):
    def __init__(self):
        super().__init__()


class ThreadedStateMachine(StateMachine, QThread):
    def __init__(self):
        super().__init__()


if __name__ == "__main__":
    t = ThreadedStateMachine()

我希望这可以正常工作，但我收到了这个异常

QObject::connect: No such signal ThreadedStateMachine::started()
Traceback (most recent call last):
  File "/snap/pycharm-community/132/helpers/pydev/pydevd.py", line 1758, in <module>
    main()
  File "/snap/pycharm-community/132/helpers/pydev/pydevd.py", line 1752, in main
    globals = debugger.run(setup['file'], None, None, is_module)
  File "/snap/pycharm-community/132/helpers/pydev/pydevd.py", line 1147, in run
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "/snap/pycharm-community/132/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "/home/aaron/.PyCharmCE2019.1/config/scratches/emerson_pmd/new/scratch_7.py", line 15, in <module>
    t = ThreadedStateMachine()
  File "/home/aaron/.PyCharmCE2019.1/config/scratches/emerson_pmd/new/scratch_7.py", line 11, in __init__
    super().__init__()
  File "/home/aaron/.PyCharmCE2019.1/config/scratches/emerson_pmd/new/scratch_7.py", line 6, in __init__
    super().__init__()
  File "/snap/pycharm-community/132/helpers/pydev/_pydev_bundle/pydev_monkey_qt.py", line 181, in __init__
    self.started = StartedSignalWrapper(self, self.started)
  File "/snap/pycharm-community/132/helpers/pydev/_pydev_bundle/pydev_monkey_qt.py", line 151, in __init__
    self.original_started.connect(self._signal)
TypeError: connect() failed between started() and _signal()

QObject将和QThread类组合成一个对象的正确方法是什么？

笔记

我目前正在使用threading.Thread作为一种解决方法，但我希望能够QMessageBox从另一个线程启动一个，这会显示一个错误：

QObject::connect: Cannot queue arguments of type 'QItemSelection'
(Make sure 'QItemSelection' is registered using qRegisterMetaType().)
QBasicTimer::start: Timers cannot be started from another thread

我相信 usingQThread会在这里工作。

标签： pythonpyqtpyqt5qthreadqobject

python - 将 QObject 和 QThread 多类化在一起

问题描述

笔记

解决方案

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