我试图实现一个使用获取的结果控制器作为其数据源的AQGridView.
我不太确定如何使用网格视图来处理NSFetchedResultsController委托方法;即内容变化.我了解如何将FRC用于其他网格视图数据源代理.
有人可以指出我的方向正确吗？
解决方法
结果应该看起来有点像这样：
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller
{
[gridView beginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type
{
switch(type)
{
case NSFetchedResultsChangeInsert:
break;
case NSFetchedResultsChangeDelete:
break;
}
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath
{
ChannelPageViewController *currentPageController,*destinationPageController;
NSIndexSet * indices = [[NSIndexSet alloc] initWithIndex: indexPath.row];
NSIndexSet *newIndices = [[NSIndexSet alloc] initWithIndex:newIndexPath.row];
switch(type) {
case NSFetchedResultsChangeInsert:
[gridView insertItemsAtIndices:newIndices withAnimation:AQGridViewItemAnimationNone];
break;
case NSFetchedResultsChangeDelete:
[gridView deleteItemsAtIndices:indices withAnimation:AQGridViewItemAnimationNone];
break;
case NSFetchedResultsChangeUpdate:
[gridView reloadItemsAtIndices:indices withAnimation:AQGridViewItemAnimationNone];
break;
case NSFetchedResultsChangeMove:
[gridView deleteItemsAtIndices:indices withAnimation:AQGridViewItemAnimationNone];
[gridView insertItemsAtIndices:newIndices withAnimation:AQGridViewItemAnimationNone];
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
[gridView endUpdates];
if ([[frc fetchedObjects] count] == 1) {
[gridView reloadData];
}
}
