How to set a boolean in objective-c

I am trying to set a boolean, but it won开发者_开发百科't let me set it true. It keeps telling me that YES is redefined. I am using the method #define YES (q1); where q1 is the boolean.

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BOOL yourBool = YES;

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Why are you doing this?

#define YES (q1);

its a preprocessor macro to replace all occurences of the word YES with (q1) if thats what you actually want to do(you probably don't), then use BOOL yourBool=TRUE;

but its a really bad idea to redefine YES. don't.

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I think the define you are looking for is:

#define q1 YES

To verify:

NSLog(@"Q1 is set to %@", (q1 ? @"YES" : @"NO"));

if (q1)
{
    // Do something funky
}