基于pyqt实现子线程Thread-1中的动作在主线程MainThread中完成

class OpenView(QtCore.QObject):
    nextSignal = QtCore.pyqtSignal([int, str])

    def __init__(self, vis):
        super(OpenView, self).__init__()    
        
        self.nextSignal.connect(self.update_next)
        threading.Thread(target=self._on_update_thread).start()     

    def _on_update_thread(self):
        while not self.is_done:
            # Get the next frame, for instance, reading a frame from the file.
            if not self.is_ready or not self.is_playing:
                time.sleep(0.2)
            else:  # ready and playing
                self.nextSignal.emit(0, 'ignored')               
                time.sleep(0.05)

    def update_next(self, ignored_int, ignored_str):
        
        print('播放中...')

        pass        

实际运行

[2022-05-07 17:38:52.961103 MainThread]-播放中... 用时 24 ms