NSFetchResultsController에서 객체 수를 제한하는 방법은 무엇입니까?

Question

나는

- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller { 
    DLog(@"controllerWillChangeContent: %@", controller); 
    [self.tableViewA beginUpdates]; 

} 


- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo 
      atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type { 

    DLog(@"didChangeSection: %@", controller); 

    switch(type) { 
     case NSFetchedResultsChangeInsert: 
      [self.tableViewA insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade]; 
      break; 

     case NSFetchedResultsChangeDelete: 
      [self.tableViewA deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade]; 
      break; 
    } 
} 


- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject 
     atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type 
     newIndexPath:(NSIndexPath *)newIndexPath { 

    DLog(@"controller:%@\ndidChangeObject:%@\natIndexPath:%@\nforChangeType:%d\nnewIndexPath:%@\n",controller, anObject, indexPath, type, newIndexPath); 

    UITableView *tableView = self.tableViewA; 
    DLog(@"%@", self.tableViewA); 
    switch(type) { 
     case NSFetchedResultsChangeInsert: 
       [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationRight]; 
      break; 

     case NSFetchedResultsChangeDelete: 
      [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight]; 
      break; 

     case NSFetchedResultsChangeUpdate: 
      [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationNone]; 
      [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]withRowAnimation:UITableViewRowAnimationNone]; 
      //[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationNone]; 
      break; 

     case NSFetchedResultsChangeMove: 
      [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight]; 
      [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath]withRowAnimation:UITableViewRowAnimationRight]; 
      break; 
    } 

} 


- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller { 
    [self.tableViewA endUpdates]; 
} 

및 performFetch 전에 나는 평균의

request.fetchLimit = 100; 
    request.fetchBatchSize = 100; 

내가 데이터 불과 100을 보여주고 싶은 사용 NSFetchedResultsControllerDelegate

사용 내가있는 tableView

에서

을 데이터를 표시 할 필요가 NSFetchedResultsController을 가지고 있지만, NSManagedObjectContext가 변경 될 무언가를하면 NSFetchedResultsControllerDelegate를 호출하고 tableView에 모든 데이터를 삽입합니다. 문제가있는 tableView는

가 내가있는 tableView 100 개 이상의 데이터를 표시 할 수 없습니다 할 수있는 방법

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{ 
    id <NSFetchedResultsSectionInfo> sectionInfo = [[self.FetchController sections] objectAtIndex:section]; 
    CalledRowCountingNotYetCallRowForSection=true; 
    [self.tableViewA setBounces:YES]; 


    if([sectionInfo numberOfObjects]>100){ 
     //[Timer searchCriteriaChanged]; 
     CLog(@"Something Wrong This NumberOfRow: %d", [sectionInfo numberOfObjects]); 
    } 
    else{ 
    } 
    return [sectionInfo numberOfObjects]; 
} 

numberOfRowsInSection

을 설정하려면이 기능을 사용하여 100 개 이상의 데이터를 ... 보여줄 수있다?

Answer 1

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 

이 함수는 numberOfRowsInSection을 설정하고 숫자를 가져 오지 않을 수 있습니다.

-(void)controller:(NSFetchedResultsController *)controller 
     didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo 
     atIndex:(NSUInteger)sectionIndex 
     forChangeType:(NSFetchedResultsChangeType)type { 

DLog(@"didChangeSection: %@", controller); 

switch(type) { 
    case NSFetchedResultsChangeInsert: 
    if([YourtableView numberOfRowsInSection:yourSection]>100){ 
     return; //TO avoid insertion 
    } 
    ... 
    ... 
    ... 
} 
}