我见过这样的例子:
self.connect(self.ui.add_button, QtCore.SIGNAL('clicked()'),self.printer)
这样的例子:
self.ui.add_button.clicked.connect(self.printer)
我刚开始学习Qt;我应该关注哪一个?
答案 0 :(得分:3)
我认为第二个例子只有一些Qt版本(较新的版本)支持,而第一个版本则由旧版本支持。 但是,两者都是正确的。
答案 1 :(得分:0)
AFAIK,如果信号过载,较新的风格不起作用,所以
self.ui.add_button.clicked.connect(self.printer)
如果还有一个,则不能使用
clicked(float, float)
所以你必须回归旧款式。了解两者总是好的。
答案 2 :(得分:0)
我知道这篇文章很老了,但我偶然发现了它, 也许你也会这样,现在这可以节省你的一天;)好吧...... 顺便说一句,这是我在SO的第一篇文章,是的!是的!
警告,我没有测试这段代码,我刚刚复制了一段时间前我写过的一些代码片段,所以,可能会有一些错误,但我希望无论如何都有帮助
PyQt的新风格简要说明:
# notice that the signal declarations are at class level (not inside some method)
class MyClass(QObject): # must subclass QObject (or subclass)
# declaring signals
mySimpleSignal = pyqtSignal()
mySignalWithArguments = pyqtSignal(int, list)
myOverloadedSignal = ([int, object],[str,object])
def __init__(self, parent=None):
super(MyClass,self).__init__(parent=parent) # remember to init the super class
[...]
# methods
[...]
# connecting signals
def connectSignalsMethod(self):
# connecting simple signal
self.mySimpleSignal.connect(self.mySlot)
# connecting signal with arguments
self.mySignalWithArguments.connect(self.mySlotWithArguments)
# connecting overloaded signals
self.myOverloadedSignal[int, object].connect(self.mySlot1)
self.myOverloadedSignal[str, object].connect(self.mySLot2)
# same syntax for disconnect()
# emitting signals
def emitSignalsMethod(self):
# emitting simple signal
self.mySimpleSignal.emit()
# emitting signal with arguments
self.mySignalWithArguments.emit(123,['this','is','a','list'])
# emitting overloaded signal
myOverloadedSignal[str,object].emit('this is a string', myObject)
# my slots
@pyqtSlot()
def mySlot(self):
print('hey!')
@pyqtSlot(int, list)
def mySlotWithArguments(self, someNumber, someList):
print('got a number: %d and a list: %s' % (someNumber, someList))
@pyqtSlot(int, object)
def mySlot1(self, intArg, objectArg):
print('got an int and an object')
@pyqtSlot(str, object)
def mySlot2(self, str, object):
print('got a string and an object')
# an overloaded slot
@pyqtSignal(int)
@pyqtSignal(str)
def overloadedSlot(someArgument)
print('got something: %s' % someArgument)
否则,试试这个 http://www.harshj.com/2010/05/06/pyqt-faq-custom-signals-jpeg-mouse-hovers-and-more/#custom
编辑: 事件和信号不一样,你上面看到的是信号