NSCountedSet – 获取集合中的项目数

我有一个信息数组，我有多个名称，我想要匹配和计数，然后移动到一个表视图，你会看到一个消息应用程序。

我已经达到了这一点。 在哪里我可以login，看看我想要什么，但根本找不到任何解决scheme从该集合中拉出信息，并相应放置到一个tableview 。

例

- (void)directMessagesReceived:(NSArray *)messages forRequest:(NSString *)connectionIdentifier{ for(NSDictionary *d in messages) { // NSLog(@"See Direct Messageges Parsing Info: %@", d); Tweet *tweetDic = [[Tweet alloc] initWithTweetDictionary:d]; //[directMessages addObject:tweetDic]; [tweetDic autorelease]; } //[arayToScan addObject:[messages valueForKey:@"sender_screen_name"]]; [arayToScan addObjectsFromArray:messages]; [self checkForDuplicateIDs]; // NSLog(@"Same ScreenName Received: %@", arayToScan); //[self.mainTableView reloadData]; NSLog(@"DM COUNT = %i",[directMessages count]); [DSBezelActivityView removeViewAnimated:YES]; } - (NSSet *)checkForDuplicateIDs { //CHECK FOR DUPLICATES IN ARRAY NSArray *allIDs = [arayToScan valueForKeyPath:@"sender_screen_name"]; NSArray *sortedIDs = [allIDs sortedArrayUsingSelector:@selector(compare:)]; NSString *previousID = nil; duplicateIDs = [NSMutableSet set]; for (NSString *anID in sortedIDs) { if ([previousID isEqualToString:anID]) { [duplicateIDs addObject:anID]; } previousID = anID; } //THEN REMOVE ANY DUPLICATES IN NEW ARRAY NSCountedSet *countedSet = [NSCountedSet setWithArray:sortedIDs]; NSMutableArray *oneMess = [NSMutableArray arrayWithCapacity:[sortedIDs count]]; NSMutableArray *multipleMess = [NSMutableArray arrayWithCapacity:[sortedIDs count]]; for(id obj in countedSet) { if([countedSet countForObject:obj] == 1) { [oneMess addObject:obj]; } for(id duplicatenames in countedSet) { if ([countedSet countForObject:duplicatenames]>1) { [multipleMess addObject:duplicatenames]; [countedSet countForObject:duplicatenames]; } } } //NSLog(@"NSCountedSet = %@",[countedSet allObjects]); //NSLog(@"NSCountedSet = %@",countedSet); //NSLog(@"One Message = %@",oneMess); // NSLog(@"Multiple Messages = %@",multipleMess); //HERE I HAVE ORIGINAL ARRAY IN ALBETICAL ORDER // NSLog(@"Messages Containing more then 1 = %@",sortedIDs); //HERE I HAVE DUPLICATES IN ALBETICAL ORDER // NSLog(@"Messages Containing more then 1 = %@",duplicateIDs); //HERE I HAVE THE MESSAGES ONLY CONTAING 1 //NSLog(@"Messages Containing only 1 = %@",oneMess); //NOW I WANT TO COUNT THE DUPLICATES TO PLACE AS A STRING IN CELL FOR # OF MESSAGES & # OF ROW IN TBLVIEW //NSLog(@"Duplicates count = %i",[duplicateIDs count]); // NSLog(@"Messages Containing only count = %i",[oneMess count]); //HERE I WOULD ADD BOTH ARRAYS AND SEND TO MY ARRAY BELOW WHICH IS USED FOR MY TBLVIEW THIS INFO IS RETRIEVABLE WHAT I NEED IS THE # OF EACH DUPLICATE AS SEEN //ARRAY *NEWARRAY INIT WITH OBJECTS ,ONEMESS, MULTIPLEMESS, //ARRAY CUSTOM # OF EACH MULTIPLE MESSAGE TO SHOW IN TBLVIEW??? //THEN I CAN CONTINUE WITH THE BELOW METHOD TO RELOD THE TABLEVIEW //[directMessages addObject:NEWARRAY]; //[self.mainTableView reloadData]; return [[duplicateIDs copy] autorelease]; } 

这是日志…这发生了很多次，但我只是logging下来，看看它是否正在工作。 任何帮助将不胜感激

 Counted = <NSCountedSet: 0x6d8cb80> (Nkapoor124 [33], iphonetechtips [3], jima6636 [4], pro1995 [2], iphone266 [2], eenofonn [1], iphoneMaster323 [3], FreeAppl3 [2], Bababooey13 [7], _CL1CK_ [5], _ToyVan_ [4], Nucleiosis [26], dracossaint [6], AlexInHouston [1], FlybriTn [7], iOSGraphix [1], deckedsg [5], 19est80 [3], JHackstar [2], barsoverbeats [7], anonomys209 [5], 87whitestallion [1], bAdGigabit [55], Sgt_Impacto [3], Nazaroth [2], K_Nitsua [1], MannyIphone [6], iphoneman76 [3]) 

Answer 1

在你的澄清，你要求的数量（数字？）的每个副本。 你可以在下面的计数。 如果你正在寻找每个重复的次数（而不是每个的总数），那么这个数是每个都是1。 如果它是计数 – 1是0，没有重复。

我想你正在寻找NSCountedSet的countForObject方法。

下面的示例…

  NSArray *names = [NSArray arrayWithObjects:@"John", @"Jane", @"John", nil]; NSCountedSet *set = [[NSCountedSet alloc] initWithArray:names]; for (id item in set) { NSLog(@"Name=%@, Count=%lu", item, (unsigned long)[set countForObject:item]); } 

会输出：

 2011-09-30 01:00:50.665 Craplet[7854:707] Name=Jane, Count=1 2011-09-30 01:00:50.679 Craplet[7854:707] Name=John, Count=2