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PODeclare External Functions In A Cocoa / Obj-C Project
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2009-05-06T02:10:47.540
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Ok, here goes. I've completed a Cocoa foundation-tool that calculates mean absolute deviation of random integers (Just as a learning project). I've moved the calculation into a function called "findMeanAbsoluteDeviation()" It accepts a NSMutableArray of NSNumber objects to preform calculations. Anyways. So this works all fine and dandy when I declare it in the same ".m" file as my other code. <pre><code>#import <Foundation/Foundation.h> float findMeanAbsoluteDeviation(NSMutableArray * array); int main (int argc, const char * argv[]) { ...generate random integers, execute function... meanAbsoluteDeviation = findMeanAbsoluteDeviation(numArray); } float findMeanAbsoluteDeviation(NSMutableArray * array) { ...mean absolute deviation maths... </code></pre> } and it works fine. Now, I would like to move the function to an external file. I created a subclass of NSObject named "mad". I moved the function into my mad "mad.m", I read up and then re-formatted the declaration to look like <pre><code>-(float)findMeanAbsoluteDeviation:(NSMutableArray *)array { ...code... } </code></pre> and in my "mad.h" file. <pre><code>@interface mad : NSObject { } - (float)findMeanAbsoluteDeviation:(NSMutableArray *)array; @end </code></pre> seems all awesome. Right? all I have to do is add... <pre><code>#import "mad.m" </code></pre> to the top of my "main.m" file and use the function as I would normally. Well, it doesn't seem to compile correctly. <pre><code>ld: duplicate symbol .objc_class_name_mad in ------standardDeviation.build/Debug/standardDeviation.build/Objects-normal/i386/mad.o and ------standardDeviation.build/Debug/standardDeviation.build/Objects-normal/i386/standardDeviation.o </code></pre> "------" is omitted for length's sake <pre><code>Command /Developer/usr/bin/gcc-4.0 failed with error code 1 </code></pre> Any ideas? Thanks for your help!
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<c><objective-c><cocoa><function>
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Declare External Functions In A Cocoa / Obj-C Project
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1. USMatt Egan
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