Take a look at NSCountedSet
this will help with your problem.
NSCountedSet *countedSet = [[NSCountedSet alloc] initWithArray:youArray];
NSInteger maxCount = 0;
id maxObject = nil;
for (id object in countedSet) {
if ([countedSet object] > maxCount) {
maxCount = [countedSet countForObject:object];
maxObject = object;
}
}
return maxObject;
This does sound like homework though.
EDIT
If they are stored as strings instead of numbers then swap out NSNumber
for NSString
everything else works the same.
EDIT
Actually, I just realised that it doesn't care about what object type it is...
Latest edit will work whatever the object is.