_cmd in Swift language [duplicate]

问题

This question already has answers here:

What is the swift equivalent to _cmd? (2 answers)

Is there a Swift alternative for NSLog(@“%s”, __PRETTY_FUNCTION__) (11 answers)

Closed 5 years ago.

My previous question was marked duplicate. I tried to edit my question, but I can't remove duplicate tag, so I have to create a new one What is the swift equivalent to _cmd?

I want to get current method name to use in a format message similar to this one

[NSExeception raise:NSInternalInconsistencyException format:@"You must override %@ in a subclass", NSStringFromSelector(_cmd)]

Also, I want to use _cmd as key to set associated object. Does anyone know the equivalent of _cmd in Swift I really appreciate.

回答1:

There's no _cmd, but you can use __FUNCTION__ to get the name of the current function, which can be used in place of selectors most of the time.

func myUnimplementedMethod() {
    println("You must override \(__FUNCTION__) in a subclass")
}
myUnimplementedMethod()
// prints "You must override myUnimplementedMethod() in a subclass"

来源：https://stackoverflow.com/questions/24483379/cmd-in-swift-language