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joslinm/gist:5341452

Created April 8, 2013 23:19
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basic objc/runtime usage
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gistfile1.m
#define KEY @"key"
// Set vaulue as a property of obj
id obj = [NSObject alloc] init]
id value = [[NSObject alloc] init]
objc_setAssociatedObject(obj, KEY, value, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
// Get that same value from object
id value = objc_getAssociatedObject(obj, KEY)
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