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Comparison between pointer and integer error

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+2 A:

self.rule.sunday is returning an object reference. YES is not an object, it's an unsigned char. So you're comparing an object reference (ie, a memory address) to 1. Of course it's going to complain at you.

Dave DeLong 2010-05-03 16:09:46

Ok...but if the object being referred to is a boolean, how are you supposed to compare against it for decision-making purposes? The construct I'm shooting for is, "If the boolean 'sunday' attribute of the Rule entity called 'rule' is 'yes' then do some stuff."

Andy 2010-05-03 16:36:53

@Andy there is no such thing as a boolean object (unless you've created one). BOOLs are commonly wrapped in `NSNumber` objects, so in that case you'd use `-boolValue` to extract the `BOOL`. But a better question is: how are you declaring the `sunday` property on the `rule` type?

Dave DeLong 2010-05-03 16:49:17

I'm using Core Data to manage the objects; the "sunday" attribute is marked as a "Boolean."While I was waiting I came across the NSNumber Class reference and the -boolValue and +numberWithBool methods. Substituting those on the lines in question took care of all of the compiler warnings, and eliminated another bug that I hadn't even started working on yet.Thanks for the shove in the right direction, Dave.

Andy 2010-05-03 16:54:49

@Andy yep, that makes sense. I think the easiest way to fix this would be `if ([self.rule.sunday boolValue] == YES) { ... }`, since that means you won't have to be creating a ton of `[NSNumber numberWithBool:YES]` objects. Glad I could help! :)

Dave DeLong 2010-05-03 16:57:49

That's exactly how I did it. The only places I used the numberWithBool method was where a slice of code needed to update the 'sunday' attribute. Thanks again.

Andy 2010-05-03 16:59:11

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Comparison between pointer and integer error

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