XHScrollMenu 介绍
XHScrollMenu是用于显示新闻栏目的组件，基于网易新闻App而做的。
使用方法：
NSMutableArray *menus = [[NSMutableArray alloc] initWithCapacity:10];
for (int i = 0; i < 20; i ++) {
XHMenu *menu = [[XHMenu alloc] init];
menu.title = [NSString stringWithFormat:@"Title%d", i];
menu.titleColor = [UIColor colorWithWhite:0.141 alpha:1.000];
menu.titleFont = [UIFont boldSystemFontOfSize:16];
[menus addObject:menu];
}
XHScrollMenu *scrollMenu = [[XHScrollMenu alloc] initWithFrame:CGRectMake(0, 44, CGRectGetWidth(self.view.bounds), 36)];
scrollMenu.backgroundColor = [UIColor colorWithWhite:0.902 alpha:1.000];
scrollMenu.delegate = self;
[self.view addSubview:scrollMenu];
scrollMenu.menus = menus;
[scrollMenu reloadData];
if you set default select 2 title item, you need set the property
scrollMenu.defaultSelectIndex = 2;