This is a relevant article 
https://www.mikeash.com/pyblog/friday-qa-2015-12-25-swifty-targetaction.html?utm_campaign=iOS%2BDev%2BWeekly&utm_medium=email&utm_source=iOS_Dev_Weekly_Issue_231

For this topic

Sent from my iPhone

> On 31 Dec 2015, at 01:33, James Campbell <[email protected]> wrote:
> 
> Good point. Not sure if that's replaceable via a protocol or if that Api is 
> just not suited for swift. 
> 
> There is a proposal somewhere to be able to reference swift methods via back 
> ticks a sort of selector for swift so maybe in this case we would use that.
> 
> Sent from my iPhone
> 
>> On 30 Dec 2015, at 20:27, Tino Heth <[email protected]> wrote:
>> 
>> 
>>> I'm not as familiar with OS X but why is it vital there ?
>> 
>>> Do you have an example of use ?
>> 
>> If those questions are for me ;-):
>> Afair (have to do iOS most of the time now), "Undo" is the most prominent 
>> example. You don't link those menu entries to a concrete object, but rather 
>> say "bind this to a selector whose name is…", and then the system can 
>> determine the actual target (there may be many controls which support undo).
>> Additionally, before this can happen, the system has to determine wether an 
>> entry is enabled at all — you can't do this when you have only a simple 
>> closure.
>> 
>> Best regards,
>> Tino
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