从另一个视图控制器更新UITableView数据单元格

protocol UpdateDataDelegate: class {
    func updateData(with newData: [String])
}

class DataSourceViewController: UIViewController {
    weak var delegate: UpdateDataDelegate?
    
    // 其他代码...
}

class DataSourceViewController: UIViewController {
    // ...

    func updateData() {
        let newData = ["Data 1", "Data 2", "Data 3"]
        delegate?.updateData(with: newData)
    }
    
    // ...
}

class TargetViewController: UIViewController, UpdateDataDelegate {
    // ...
    
    func updateData(with newData: [String]) {
        // 更新UITableView的数据源
        // tableViewData = newData
        // tableView.reloadData()
    }
    
    // ...
}

class TargetViewController: UIViewController {
    // ...

    func showDataSourceView() {
        let dataSourceVC = DataSourceViewController()
        dataSourceVC.delegate = self
        present(dataSourceVC, animated: true, completion: nil)
    }
    
    // ...
}