UITableView中Cell和section的插入与删除

插入段：

- (void)insertSections:(NSIndexSet *)sections withRowAnimation:(UITableViewRowAnimation)animation;

- (void)deleteSections:(NSIndexSet *)sections withRowAnimation:(UITableViewRowAnimation)animation;

插入行：

- (void)insertRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation;

- (void)deleteRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation;

如果在编辑模式下，复写此方法：

 - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
 {
     if (editingStyle == UITableViewCellEditingStyleDelete) {
         // Delete the row from the data source
         if (indexPath.row == ) {
             [self.modeInfomation removeObjectAtIndex:indexPath.section];
             [self.modeNameArr removeObjectAtIndex:indexPath.section];
             NSIndexSet *sectionIndex = [NSIndexSet indexSetWithIndex:indexPath.section];
             [self.tableView deleteSections:sectionIndex withRowAnimation:UITableViewRowAnimationLeft];
         }
         else {
             [[self.modeInfomation objectAtIndex:indexPath.section] removeObjectAtIndex:indexPath.row];
             [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
         }
     }
     else if (editingStyle == UITableViewCellEditingStyleInsert) {
         // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
     }
 }

在普通模式下：

 [self.tableView beginUpdates];
     [[self.modeInfomation objectAtIndex:tag] addObject:@"hehe"];
     NSIndexPath *indexpath = [NSIndexPath indexPathForRow:row +  inSection:tag];
     [self.tableView insertRowsAtIndexPaths:@[indexpath] withRowAnimation:UITableViewRowAnimationRight];
     [self.tableView endUpdates];

注意：

插入或者删除行或段，先更新datasource，再insertRows或insertSections!两个都要更新！