python qt5线程don';t实时刷新控件
我正在使用QT5和python编写一个UI,我添加了一个线程来处理UI,线程工作“很好”,线程中的一个函数接收2个字符串并返回2个字符串(我在开发实际项目之前进行实验,只是为了看看它是如何工作的),正如您在调用线程函数后的代码中所看到的:python qt5线程don';t实时刷新控件,python,pyqt5,qthread,Python,Pyqt5,Qthread,我正在使用QT5和python编写一个UI,我添加了一个线程来处理UI,线程工作“很好”,线程中的一个函数接收2个字符串并返回2个字符串(我在开发实际项目之前进行实验,只是为了看看它是如何工作的),正如您在调用线程函数后的代码中所看到的: self.requestConexion.emit('lblText1','dddddd') 我调用另一个函数,它只是一个简单的计数器 self.contador() 所以我希望在计数器完成控件self.lblText1的值更改之前,这不会发生。。。以下是
self.requestConexion.emit('lblText1','dddddd')
我调用另一个函数,它只是一个简单的计数器
self.contador()
所以我希望在计数器完成控件self.lblText1的值更改之前,这不会发生。。。以下是主要代码:
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
import UI_test
import time
import sys
class Threaded(QObject):
result=pyqtSignal(str,str)
def __init__(self, parent=None, **kwargs):
super().__init__(parent, **kwargs)
@pyqtSlot(str,str)
def etiquetas(self,lbl,texto):
print(texto)
self.result.emit(lbl,texto)
class MainApp(QMainWindow, UI_test.Ui_MainWindow):
requestConexion=pyqtSignal(str,str)
def __init__(self, parent=None):
super(MainApp, self).__init__(parent)
self._thread=QThread()
self._threaded=Threaded(result=self.displayLabel)
self.requestConexion.connect(self._threaded.etiquetas)
self._threaded.moveToThread(self._thread)
qApp.aboutToQuit.connect(self._thread.quit)
self._thread.start()
self.setupUi(self)
self.btnStart.clicked.connect(self.conexion)
@pyqtSlot()
def conexion(self):
#self._thread.start()
print(1)
self.requestConexion.emit('lblText1','dddddd')
self.contador()
text, ok = QInputDialog.getText(self, 'Text Input Dialog', 'Enter your name:')
if ok:
print(str(text))
@pyqtSlot()
def contador(self):
i=0
while i<50:
print(i)
time.sleep(0.1)
i+=1
@pyqtSlot(str,str)
def displayLabel(self, etiqueta, texto):
self.lblText1.setText(etiqueta)
print(texto)
def main():
app = QApplication(sys.argv)
form = MainApp()
form.show()
app.exec_()
exit(app.exec_())
if __name__ == '__main__':
main()
从PyQt5.QtCore导入*
从PyQt5.QtWidgets导入*
从PyQt5.QtGui导入*
导入用户界面测试
导入时间
导入系统
类线程化(QObject):
结果=PYQT信号(str,str)
def uuu init uuuu(self,parent=None,**kwargs):
super()。\uuuuu init\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
@pyqtSlot(str,str)
定义etiquetas(自我、lbl、文本):
打印(文本)
self.result.emit(lbl,texto)
类MainApp(QMainWindow、UI\u test.UI\u MainWindow):
requestConexion=pyqtSignal(str,str)
def uuu init uuu(self,parent=None):
超级(主应用程序,自我)。\uuuuu初始化\uuuuuuu(父级)
self.\u thread=QThread()
self.\u threaded=threaded(结果=self.displayLabel)
self.requestConexion.connect(self.\u threaded.etiquetas)
自线程。移动到线程(自线程)
qApp.aboutToQuit.connect(self.\u thread.quit)
self.\u thread.start()
self.setupUi(self)
self.btnStart.clicked.connect(self.conexion)
@pyqtSlot()
def conexion(自):
#self.\u thread.start()
印刷品(1)
self.requestConexion.emit('lblText1','dddddddd')
self.contador()
text,ok=QInputDialog.getText(self,'text Input Dialog','Enter your name:')
如果确定:
打印(str(文本))
@pyqtSlot()
def contador(自我):
i=0
我终于在下一篇博客中找到了我问题的答案:
这是一个非常棒的教程,在阅读了博客中的文档后,我能够修改其中一个示例,实时修改标签控件的文本;以下是最终代码:
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import time
class Worker(QRunnable):
def __init__(self, fn, *args, **kwargs):
super(Worker, self).__init__()
self.args = args
self.kwargs = kwargs
self.fn = fn
@pyqtSlot()
def run(self):
#print(self.args, self.kwargs)
print("Thread start")
time.sleep(0.2)
self.fn(*self.args, **self.kwargs) #ejecuta la funcion recibida
class MainWindow(QMainWindow):
def __init__(self, *args, **kwargs):
super(MainWindow, self).__init__(*args, **kwargs)
self.threadpool = QThreadPool()
print("Multithreading with maximum %d threads" % self.threadpool.maxThreadCount())
self.counter = 0
layout = QVBoxLayout()
self.l = QLabel("Start")
self.l2 = QLabel("xxxxx")
b = QPushButton("DANGER!")
b.pressed.connect(self.oh_no)
layout.addWidget(self.l)
layout.addWidget(self.l2)
layout.addWidget(b)
w = QWidget()
w.setLayout(layout)
self.setCentralWidget(w)
self.show()
self.etiqueta="rrrrrrrrrr"
self.timer = QTimer()
self.timer.setInterval(500)
self.timer.timeout.connect(self.recurring_timer)
self.timer.start()
def oh_no(self):
self.etiqueta="hhhhhhhhhhhhhhhhh"
worker = Worker(self.execute_this_fn,'4444')
self.threadpool.start(worker)
def recurring_timer(self):
self.counter +=1
self.l.setText("Counter: %d" % self.counter)
def execute_this_fn(self,x):
print("Hello!")
self.l2.setText(x)
app = QApplication([])
window = MainWindow()
app.exec_()
GUI不应从另一个线程更新,在您的情况下,您使用的是self.l2.setText(x)
,这就是信号的用途,因此您可以更好地理解并阅读文档: