多选

第一步：初始化model加入可变数组

- (void)initWithData {    _dataArray = [NSMutableArray arrayWithCapacity:1];        for (int i=0; i<20; i++) {        SelectedModel *sModel = [[SelectedModel alloc] init];        sModel.title = [NSString stringWithFormat:@"%d", i];        sModel.isSelected = NO;        [_dataArray addObject:sModel];    }    }

第二步：在代理中实现选中取消选中的状态

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {    [tableView deselectRowAtIndexPath:indexPath animated:YES];    SelectedModel *model = _dataArray[indexPath.row];    model.isSelected = !model.isSelected;    [_dataArray replaceObjectAtIndex:indexPath.row withObject:model];    [self.myTableView reloadData];}

单选

与多选的区别在于代理方法的处理不同

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {    [tableView deselectRowAtIndexPath:indexPath animated:YES];    if (_lastIndex != -1) {        SelectedModel *sModel = _dataArray[_lastIndex];        sModel.isSelected = NO;        [_dataArray replaceObjectAtIndex:_lastIndex withObject:sModel];    }        _lastIndex = indexPath.row;    SelectedModel *model = _dataArray[indexPath.row];    model.isSelected = YES;    [_dataArray replaceObjectAtIndex:indexPath.row withObject:model];    [self.myTableView reloadData];    }