启动时将参数传递给pyqt线程

Question

当线程启动时（.start）有什么办法可以将参数传递给QThread吗？

我发现了一个在stackoverflow中使用pyqt线程的例子，但我想知道如何传递一个参数，以防我希望工作线程处理传递给它的run（）函数的数据。

我指的是后：Busy indication with PyQt progress bar

代码：

class MyCustomWidget(QtGui.QWidget): 

    def __init__(self, parent=None): 
     super(MyCustomWidget, self).__init__(parent) 
     layout = QtGui.QVBoxLayout(self)  

     self.progressBar = QtGui.QProgressBar(self) 
     self.progressBar.setRange(0,100) 
     button = QtGui.QPushButton("Start", self) 
     layout.addWidget(self.progressBar) 
     layout.addWidget(button) 

     button.clicked.connect(self.onStart) 

     self.myLongTask = TaskThread() 
     self.myLongTask.notifyProgress.connect(self.onProgress) 


    def onStart(self): 
     self.myLongTask.start() 

    def onProgress(self, i): 
     self.progressBar.setValue(i) 


class TaskThread(QtCore.QThread): 
    notifyProgress = QtCore.pyqtSignal(int) 
    def run(self): 
     for i in range(101): 
      self.notifyProgress.emit(i) 
      time.sleep(0.1) 

我想打电话。开始如

self.myLongTask.start(myvar) 
. 
. 
def run(self, myvar): 

当然，但当传递变量，PyQt的呢不允许。

Answer 1

你不能传递参数run但你可以传递参数给它的构造是这样的：

class TaskThread(QtCore.QThread): 
    def __init__(self, myvar, parent=None): 
     QThread.__init__(self, parent) 
     self.notifyProgress = QtCore.pyqtSignal(int) 
     self.myvar = myvar 
    def run(self): 
     #use self.myvar in your run 
     for i in range(101): 
      self.notifyProgress.emit(i) 
      time.sleep(0.1) 

，并在MyCustomWidget类：

class MyCustomWidget(QtGui.QWidget): 

    def __init__(self, parent=None): 
     super(MyCustomWidget, self).__init__(parent) 
     layout = QtGui.QVBoxLayout(self)  

     self.progressBar = QtGui.QProgressBar(self) 
     self.progressBar.setRange(0,100) 
     button = QtGui.QPushButton("Start", self) 
     layout.addWidget(self.progressBar) 
     layout.addWidget(button) 

     button.clicked.connect(self.onStart) 
     ############################################################## 
     #and pass your argumetn to it's constructor here 
     self.myLongTask = TaskThread(myvar=myargument) 
     ############################################################## 
     self.myLongTask.notifyProgress.connect(self.onProgress) 


    def onStart(self): 
     self.myLongTask.start() 

    def onProgress(self, i): 
     self.progressBar.setValue(i)