On Sep 22, 2016, at 16:52 , Charles Srstka <cocoa...@charlessoft.com> wrote:
> Actually nope, it showed up in 10.3, making it younger than the
> target/selector approach.
In that case, I have no plausible rationale why this was done differently. It’s
possible there was a performance-related reason. It’s possible it was a design
preference on the part of the engineer who introduced the capability. It’s
possible it has to do with the ease of overriding the behavior in subclasses.
(It’s sometimes awkward to customize the “didEnd”-style behavior.)
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