UITableView添加索引栏

#pragma mark---tableView索引相关设置----

- (NSString *) pinyinFirstLetter:(NSString*)sourceString {
NSMutableString *source = [sourceString mutableCopy];
CFStringTransform((__bridge CFMutableStringRef)source, NULL, kCFStringTransformMandarinLatin, NO);
CFStringTransform((__bridge CFMutableStringRef)source, NULL, kCFStringTransformStripDiacritics, NO);//这一行是去声调的
return source;
}

//添加索引栏标题数组

- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
NSMutableArray *resultArray =[NSMutableArray arrayWithObject:UITableViewIndexSearch];
for (NewModel * dict in self.userArray) {
NSString *title = [dict.nick_name substringWithRange:NSMakeRange(0, 1)];
NSString * newtitle = [title uppercaseString];
[resultArray addObject:newtitle];
}
//
return resultArray;
}

//点击索引栏标题时执行

- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index
{
//这里是为了指定索引index对应的是哪个section的，默认的话直接返回index就好。其他需要定制的就针对性处理
if ([title isEqualToString:UITableViewIndexSearch])
{
[tableView setContentOffset:CGPointZero animated:NO];//tabview移至顶部
return NSNotFound;
}
else
{
return [[UILocalizedIndexedCollation currentCollation] sectionForSectionIndexTitleAtIndex:index] - 1; // -1 添加了搜索标识
}
}