Here is an example of reversing a NSArray/NSMutableArray
NSString *string = @"a,b,c,d,e,f,g,h,i,j,k";
NSArray *array = [string componentsSeparatedByString:@","];
NSLog(@"array = %@",array);
NSArray* reversedArray = [[array reverseObjectEnumerator] allObjects];
NSLog(@"Reverse array = %@",reversedArray);
Happy coding all iPhone coderz