Question

在点击开始时附带的代码中，它会创建QSpinBox并在QThread开始计数到20，但如果我点击开始再次计数时，第一个QSpinBox停止，一个新的重点关注，两个计数器都在其中运行，但我需要所有旋转分别在同一时间运行：

import sys
import time
from PySide.QtGui import *
from PySide.QtCore import *

class frmMain(QDialog):
    def __init__(self):
        QDialog.__init__(self)
        self.btStart = QPushButton('Start')
        self.btStop = QPushButton('Stop')
        self.counter = QSpinBox()
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.btStart)
        self.layout.addWidget(self.btStop)
        self.layout.addWidget(self.counter)
        self.setLayout(self.layout)
        self.btStart.clicked.connect(self.start_thread)
        self.btStop.clicked.connect(self.stop_thread)
        self.boxes = []

    def stop_thread(self):
        self.th.stop()

    def loopfunction(self, x):
        self.boxes[-1].setValue(x)

    def start_thread(self):
        self.th = thread(2)
        self.th.loop.connect(self.loopfunction)
        self.th.setTerminationEnabled(True)
        self.boxes.append(QSpinBox())
        self.layout.addWidget(self.boxes[-1])
        self.th.start()

class thread(QThread):
    loop = Signal(object)

    def __init__(self, x):
        QThread.__init__(self)
        self.x = x

    def run(self):
        for i in range(20):
            self.x = i
            self.loop.emit(self.x)
            time.sleep(0.5)

    def stop(self):
        self.stop()


app = QApplication(sys.argv)
win = frmMain()

win.show()
sys.exit(app.exec_())

Answer 1

我做了一些关键的改变：

在覆盖相同的线程对象时保留了单独的线程列表，
修复了停止线程时的递归错误;使用terminate代替，
线程会跟踪它自己的索引，因此它知道要更新哪个旋转框。

当您按下停止或停止后按开始时，您想要发生什么并不是很清楚，但这段代码或多或少对您有用：

import sys
import time
from PySide.QtGui import *
from PySide.QtCore import *

class frmMain(QDialog):
    def __init__(self):
        QDialog.__init__(self)
        self.btStart = QPushButton('Start')
        self.btStop = QPushButton('Stop')
        #self.counter = QSpinBox()
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.btStart)
        self.layout.addWidget(self.btStop)
        #self.layout.addWidget(self.counter)
        self.setLayout(self.layout)
        self.btStart.clicked.connect(self.start_thread)
        self.btStop.clicked.connect(self.stop_thread)
        self.boxes = []
        self.threads = []

    def stop_thread(self):
        for th in self.threads:
            th.terminate()

    def loopfunction(self, n, index):
        self.boxes[index].setValue(n)

    def start_thread(self):
        index = len(self.threads)
        th = thread(index)
        th.loop.connect(self.loopfunction)
        th.setTerminationEnabled(True)
        th.start()
        self.threads.append(th)        
        self.boxes.append(QSpinBox())
        self.layout.addWidget(self.boxes[index])        


class thread(QThread):
    loop = Signal(int, int)

    def __init__(self, index):
        QThread.__init__(self)
        self.index = index

    def run(self):
        for n in range(20):
            self.loop.emit(n, self.index)
            time.sleep(0.5)


app = QApplication(sys.argv)
win = frmMain()

win.show()
sys.exit(app.exec_())

在Python中同时运行多个qthread

1 个答案: