python - 为什么 QThread 只打印两个线程调用之一？

Question

from PySide.QtCore import *
from PySide.QtGui import *
import time as t


class WorkerThread(QThread):
    def _init_(self, mw):
    super(WorkerThread, self)._init_(mw)
    self.gameName = ""

def setGameName(self, currGameName):
    self.gameName = currGameName

def run(self):
    print self.gameName

class GG(object):
workerThread = WorkerThread()
def startThread(self,stringer):
    self.workerThread.setGameName(stringer)
    self.workerThread.start()

harro = GG()
harro.startThread("hello")
harro.startThread("hi")
t.sleep(60)

这只会打印“hi”而不是“hello”。为什么不打印两者？我将如何更改它以便同时打印两者？

Answer 1

对 startThread 的第二次调用取消了第一次。该线程没有时间打印您再次调用它要求打印“hi”的“hello”。 您可以在 QThread.start() 之后调用 QThread.wait() 以等待线程完成。

一个工作示例(同样，具有正确的标识):

class WorkerThread(QThread):
    def _init_(self, mw):
        super(WorkerThread, self)._init_(mw)
        self.gameName = ""

    def setGameName(self, currGameName):
        self.gameName = currGameName

    def run(self):
        print self.gameName

class GG(object):
     workerThread = WorkerThread()

     def startThread(self,stringer):
        self.workerThread.setGameName(stringer)
        self.workerThread.start()
        self.workerThread.wait()

harro = GG()
harro.startThread("hello")
harro.startThread("hi")

此示例将在线程运行时卡住用户界面。 所以对于更复杂的任务，你应该使用信号和槽机制。