運行多個qthreads

Question

在所附的代碼，當你點擊開始它創建一個QSpinBox，並開始在QThread數到20，但如果我再次點擊開始同時計數，第一QSpinBox停止，並新的需要關注的焦點，而這兩個計數器在運行它，但我需要的所有旋轉以分別同時運行：

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

我做了一些重要變化：

• 保留了一個單獨的線程列表，因爲您正在覆蓋同一個線程對象，
• 修復了停止線程時的遞歸錯誤;使用terminate代替
• 線程跟蹤其自己的索引，以便知道要更新哪個旋轉框。

這不是真的清楚你想，當你按下停止，或者按開始停藥後發生的事情，但是這個代碼應該更多的還是你少工作：

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_())