Catching nil Member Variables

When I wrote this method it seemed like it would be helpful,

//log a warning for any member variable that nil
- (void) warnOfNilIVars;
{
  unsigned int ivarCount = 0;
  Ivar * ivarList = class_copyIvarList([self class], &ivarCount);
  if(ivarList) {
    for(int i = 0; i < ivarCount; i++){
      const char *typeString = ivar_getTypeEncoding(ivarList[i]);
      if(typeString && typeString[0] == '@')
        if(!object_getIvar(self, ivarList[i]))
          NSLog(@"***WARNING: ivar %s of %@ is nil", ivar_getName(ivarList[i]), [self className]);
    }
    free(ivarList);
  }
}


But in practice I haven’t really used it (and when I have there were quite a few false-positives). Still, I think it’s pretty neat that you can do something like this in Objective-C.

If you find a use for it, please let me know!