Question

我正在设计一个用Python设计的基于QT的应用程序。该应用程序有以下两个按钮：

移动机器人
停止机器人

机器人需要一些时间从一个点移动到另一个点。因此，我调用一个新线程来控制机器人的移动，以防止GUI无响应。移动功能下方：

from threading import Thread
from thread import start_new_thread

def move_robot(self):
    def move_robot_thread(points):
        for point in points:
            thread = Thread(target=self.robot.move, args=(point,))
            thread.start()
            thread.join()
    start_new_thread(move_robot_thread, (points,))

以上功能效果很好。为了停止机器人运动，我需要停止执行上述线程。请参阅以下完整代码：

from python_qt_binding.QtGui import QPushButton

self.move_robot_button = QPushButton('Move Robot')
self.move_robot_button.clicked.connect(self.move_robot)
self.move_robot_button = QPushButton('Stop Robot')
self.move_robot_button.clicked.connect(self.stop_robot)
self.robot = RobotControllerWrapper()

from threading import Thread
from thread import start_new_thread

def move_robot(self):
    def move_robot_thread(points):
        for point in points:
            thread = Thread(target=self.robot.move, args=(point,))
            thread.start()
            thread.join()
    start_new_thread(move_robot_thread, (points,))

def stop_robot(self):
    pass

class RobotControllerWrapper():
    def __init__(self):
        self.robot_controller = RobotController()

    def move(self, point):
        while True:
            self._robot_controller.move(point)
            current_location = self.robot_controller.location()
            if current_location - point < 0.0001:
                break

如何停止线程的执行？有什么建议吗？

Answer 1

使用标志就足够了：

self.run_flag = False   # init the flag
...

def move_robot(self):
    def move_robot_thread(points):
        self.run_flag = True   # set to true before starting the thread
        ...

def stop_robot(self):
    self.robot.stop()

class RobotControllerWrapper():
    ...
    def move(self, point):
        while self.run_flag == True:   # check the flag here, instead of 'while True'
            ...

    def stop(self):
        self.run_flag = False   # set to false to stop the thread

在Python 2.7中立即停止线程执行/终止

1 个答案: