You're correct - there is no first argument per se: it is part of the
method selector, together they are called a "keyword."
http://developer.apple.com/documentation/Cocoa/Conceptual/CocoaFundamentals/CocoaObjects/chapter_3_section_3.html
A message with a single argument affixes a colon to the selector name
and puts the argument right after the colon. This construct is called
a keyword ; a keyword ends with a colon, and an argument follows the
colon. Thus we could diagram a message expression with a single
argument (and assignment) as the following:
****If a message has multiple arguments, the selector has multiple
keywords. A selector name includes all keywords****, including colons,
but does not include anything else, such as return type or parameter
types. A message expression with multiple keywords (plus assignment)
could be diagrammed as follows:
Well now I'm a bit confused as I just used the same paragraph to show
that it does. Too much C++ thinking I guess. I'm thinking the method
name is setWidth with two arguments, one unlabeled and the other
labeled with 'height'. Any suggestions where I should brush up on this
- apart from the manual I'm looking at already?
thanks!
Peter
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