Question

我有一个自定义tableView，它有2个标签和一个按钮。我想要做的是当我按下特定单元格中的按钮时，打印该单元格中标签的文本。

我使用了委托让按钮像这样工作。

**Protocol**

protocol YourCellDelegate : class {
    func didPressButton(_ tag: Int)
}

**UITableViewCell**

class YourCell : UITableViewCell
{
    weak var cellDelegate: YourCellDelegate?   

    // connect the button from your cell with this method
    @IBAction func buttonPressed(_ sender: UIButton) {
        cellDelegate?.didPressButton(sender.tag)
    }         
    ...
}

**cellForRowAt Function**

cell.cellDelegate = self
cell.tag = indexPath.row

**final Function**

func didPressButton(_ tag: Int) {
     print("I have pressed a button")
}

现在我如何显示来自该特定单元格的数据

非常感谢你的帮助

修改

-getting contacts from phone-

    lazy var contacts: [CNContact] = {
        let contactStore = CNContactStore()
        let keysToFetch = [
            CNContactFormatter.descriptorForRequiredKeys(for: .fullName),
            CNContactEmailAddressesKey,
            CNContactImageDataAvailableKey] as [Any]

        // Get all the containers
        var allContainers: [CNContainer] = []
        do {
            allContainers = try contactStore.containers(matching: nil)
        } catch {
            print("Error fetching containers")
        }

        var results: [CNContact] = []

        // Iterate all containers and append their contacts to our results array
        for container in allContainers {
            let fetchPredicate = CNContact.predicateForContactsInContainer(withIdentifier: container.identifier)

            do {
                let containerResults = try contactStore.unifiedContacts(matching: fetchPredicate, keysToFetch: keysToFetch as! [CNKeyDescriptor])
                results.append(contentsOf: containerResults)
            } catch {
                print("Error fetching results for container")
            }
        }

        return results
    }()

-cellForRowAt-

let cell = tableView.dequeueReusableCell(withIdentifier: "PersonCell", for: indexPath) as? PersonCell

        let contacts = self.contacts[indexPath.row]
        cell?.updateUI(contact: contacts)

        cell?.cellDelegate = self as? YourCellDelegate
        cell?.tag = indexPath.row

        return cell!

Answer 1

这里显示数据的问题是什么。您将索引值作为didPressButton委托中的标记作为参数发送。当您在此处获得委托中的索引值时，您只需显示其中的值。

假设您从cellForRowAtIndexPath中的数组传递值，您只需要按如下方式打印它。

func didPressButton(_ tag: Int) {
     print("I have pressed a button")
     let contacts = self.contacts[tag]
     print(contacts.givenName)
}

另外，不要忘记在YourCellDelegate的接口声明中设置UIViewController，如class myViewController: UIViewController,YourCellDelegate {

Answer 2

func didPressButton(_ tag: Int) {
     let selectedContact = self.contacts[tag]

    // Now use `selectedContact` to fetch Name and Phone Number 
}

如何使用按钮从自定义tableview打印数据？

2 个答案: