UItableView 刷新指定的区域 与 cell && 滚动到最底部
1.指定区
NSIndexSet *indexSet=[[NSIndexSet alloc] initWithIndex:3];
[self.tableView reloadSections:indexSet withRowAnimation:UITableViewRowAnimationBottom];
2.指定cell
NSIndexPath*indexPath = [[NSIndexPathalloc]initWithIndex:1];
[self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil] withRowAnimation:UITableViewRowAnimationFade];
3.滚动到最底部
NSIndexPath*ip = [NSIndexPathindexPathForRow:1inSection:3]; //取最后一行数据
[self.tableView scrollToRowAtIndexPath:ip atScrollPosition:UITableViewScrollPositionBottom animated:YES];
