问题描述
demo有这个方法，要实现他么
解决方案
是这个方法- (NSMutableArray *)sortDataArray:(NSArray *)dataArray{ //建立索引的核心 UILocalizedIndexedCollation *indexCollation = [UILocalizedIndexedCollation currentCollation]; [self.sectionTitles removeAllObjects]; [self.sectionTitles addObjectsFromArray:[indexCollation sectionTitles]]; //返回27，是a－z和＃ NSInteger highSection = [self.sectionTitles count]; //tableView 会被分成27个section NSMutableArray *sortedArray = [NSMutableArray arrayWithCapacity:highSection]; for (int i = 0; i <= highSection; i++) { NSMutableArray *sectionArray = [NSMutableArray arrayWithCapacity:1]; [sortedArray addObject:sectionArray]; } //名字分section for (EMBuddy *buddy in dataArray) { //getUserName是实现中文拼音检索的核心，见NameIndex类 NSString *firstLetter = [ChineseToPinyin pinyinFromChineseString:buddy.username]; NSInteger section = [indexCollation sectionForObject:[firstLetter substringToIndex:1] collationStringSelector:@selector(uppercaseString)]; NSMutableArray *array = [sortedArray objectAtIndex:section]; [array addObject:buddy]; } //每个section内的数组排序 for (int i = 0; i < [sortedArray count]; i++) { NSArray *array = [[sortedArray objectAtIndex:i] sortedArrayUsingComparator:^NSComparisonResult(EMBuddy *obj1, EMBuddy *obj2) { NSString *firstLetter1 = [ChineseToPinyin pinyinFromChineseString:obj1.username]; firstLetter1 = [[firstLetter1 substringToIndex:1] uppercaseString]; NSString *firstLetter2 = [ChineseToPinyin pinyinFromChineseString:obj2.username]; firstLetter2 = [[firstLetter2 substringToIndex:1] uppercaseString]; return [firstLetter1 caseInsensitiveCompare:firstLetter2]; }]; [sortedArray replaceObjectAtIndex:i withObject:[NSMutableArray arrayWithArray:array]]; } NSLog(@"ssssssssss===%@",sortedArray); return sortedArray;}
解决方案二：
看你的需求啊，有需要就实现啊。