pyqt5 信号槽

pyqtSignal 的数据类型可以 int str,list

getimageSignal = pyqtSignal(QImage, list)

previewSignal = pyqtSignal([int,str],[str])

简单demo：

from PyQt5 import QtCore
from PyQt5.QtCore import Qt,pyqtSignal,QSize,QRect,QMetaObject, QCoreApplication, pyqtSlot,QPropertyAnimation,QThread

1. from PyQt5 import QtWidgets,QtCore
2. from untitled import Ui_Form
3. import time
5. class MyWindow(QtWidgets.QWidget,Ui_Form):
6. _signal=QtCore.pyqtSignal(str) #定义信号,定义参数为str类型
7. def __init__(self):
8. super(MyWindow,self).__init__()
9. self.setupUi(self)
10. self.myButton.clicked.connect(self.myPrint)
11. self._signal.connect(self.mySignal) #将信号连接到函数mySignal
13. def myPrint(self):
14. self.tb.setText( "")
15. self.tb.append( "正在打印，请稍候")
16. self._signal.emit( "你妹，打印结束了吗，快回答！")
17. def mySignal(self,string):
18. print(string)
19. self.tb.append( "打印结束")
21. if __name__== "__main__":
22. import sys
24. app=QtWidgets.QApplication(sys.argv)
25. myshow=MyWindow()
26. myshow.show()
27. sys.exit(app.exec_())

1. from PyQt5 import QtWidgets,QtCore
2. from untitled import Ui_Form
3. import time
5. class MyWindow(QtWidgets.QWidget,Ui_Form):
6. _signal=QtCore.pyqtSignal(str) #定义信号,定义参数为str类型
7. def __init__(self):
8. super(MyWindow,self).__init__()
9. self.setupUi(self)
10. self.myButton.clicked.connect(self.myPrint)
11. self._signal.connect(self.mySignal) #将信号连接到函数mySignal
13. def myPrint(self):
14. self.tb.setText( "")
15. self.tb.append( "正在打印，请稍候")
16. self._signal.emit( "你妹，打印结束了吗，快回答！")
17. def mySignal(self,string):
18. print(string)
19. self.tb.append( "打印结束")
21. if __name__== "__main__":
22. import sys
24. app=QtWidgets.QApplication(sys.argv)
25. myshow=MyWindow()
26. myshow.show()
27. sys.exit(app.exec_())
28. 
    

还有一对多，多对一的高级玩法，可以参考：

https://blog.csdn.net/broadview2006/article/details/80132757