iphone - Nsrange problem when it should return 0 -

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So, I'm trying to do a nsstring search for a range, but whenever we are in range Does not match that result, I get something on the lines of 0 to 2748601949 as opposed to. For example, I'm trying to "sin (", @ "cos (", and @ "tan (" string + like + 1 + sin (28) ") + Cos (72)" Thank you " / P>

This is returning NSNotFound , which is NSObjCRuntime.h is defined in: 

  enum {NSNotFound = NSIntegerMax};

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