Re: passing nothing to method with CGPoint argument
Re: passing nothing to method with CGPoint argument
- Subject: Re: passing nothing to method with CGPoint argument
- From: Dave DeLong <email@hidden>
- Date: Sat, 05 Dec 2009 19:05:20 -0700
Anything you pass can be interpreted as a point. You could pass an NSString, but those are still pointers, and you can interpret a pointer as a regular number. You could pass a character, but characters are also numbers. In fact, everything in C can be interpreted as a number (this is often viewed as one of the limitations of C-based and similar languages). The only real way around this is to pass a special point that you test for.
An example of this is when you ask NSString for a range of a substring. It returns an NSRange, and the location is always a valid number. However, we look for a special value, NSNotFound (which is just a really really big number) to indicate that the string wasn't present.
So you could pass a point that's basically {INFINITY, INFINITY} (or something like that).
But the real question here is "what are you trying to do?".
Cheers,
Dave
On Dec 5, 2009, at 6:59 PM, Chunk 1978 wrote:
> i have an method that takes a CGPoint as an argument. i would like to
> call the method without supplying a CGPoint, but i can't pass nil or
> null. i can pass CGPointZero, but that is still a point: {0, 0}
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