获取当前cell
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
UITableViewCell *cell = [_tableView cellForRowAtIndexPath:indexPath];
获取当前cell
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
UITableViewCell *cell = [_tableView cellForRowAtIndexPath:indexPath];