pragma mark - 去除重复对象

• (NSArray )arrayWithMemberIsOnly:(NSArray )array
  {
  NSMutableArray *categoryArray =[[NSMutableArray alloc] init];
  for (unsigned i = 0; i < [array count]; i++)
  {
  if ([categoryArray containsObject:[array objectAtIndex:i]] == NO) {
  [categoryArray addObject:[array objectAtIndex:i]];
  }
  }
  return categoryArray;
  }