题
我看到的例子是这样的:
self.connect(self.ui.add_button, QtCore.SIGNAL('clicked()'),self.printer)
和类似这样的例子:
self.ui.add_button.clicked.connect(self.printer)
我刚开始学习Qt;哪一个我应着重于?
解决方案
我认为第二个例子中仅由一些Qt的版本(较新的)支承,而第一它由旧的支持。 但是,两者都是正确的。
其他提示
AFAIK,如果有过载的信号的新的风格不工作,所以
self.ui.add_button.clicked.connect(self.printer)
,如果有也是,也就是说,不能用一个
clicked(float, float)
所以你必须退回到旧的风格。它总是好的,知道这两个。
我知道这个职位是很老,但我只是碰到它绊倒, 也许你会过现在这样可以节省您的一天;)行... 顺便说一下,这是我的第一篇文章在这里SO,yey!
警告,我没有测试此代码,我刚才复制的代码的某些代码段我前写了一段时间,因此,可能会有一些错误,但我希望它有助于反正
的PyQt的新式信号简要:
# 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,尝试此 HTTP: //www.harshj.com/2010/05/06/pyqt-faq-custom-signals-jpeg-mouse-hovers-and-more/#custom
编辑: 事件和信号是不一样的,你在上面看到是什么样的信号
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