问一个pyqt多线程的问题 [复制链接]

from PyQt4.QtCore import *
from PyQt4.QtGui import *
import sys,time

class MyThread(QThread):
    def __init__(self):
        super(MyThread,self).__init__()

    def run(self):
        print 4
        #for i in range(10):
        #mainwin.textedit.setText(QString("%1").arg(3))

class MainWin(QWidget):
    def __init__(self):
        super(MainWin,self).__init__()
        self.resize(200,200)
        self.button = QPushButton("Start",self)
        self.button.setGeometry(60,100,80,30)
        self.textedit = QTextEdit(self)
        self.textedit.setGeometry(30,10,140,70)
        self.connect(self.button,SIGNAL("clicked()"),self.process)

    def process(self):
        mythread = MyThread()
        mythread.start()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    mainwin = MainWin()
    mainwin.show()
    app.exec_()

请问是不是一定要在主线程里面加wait？如果这样的话，那gui岂不是一样会看上去死掉？

另外为什么我print 4是可以的，把下面的那个注释去掉就会报错：QThread：Destroyed while threadis still running