从表格视图单元格内的文本字段中获取文本

Question

我的表格视图中有几行，每行都是我的自定义单元格类的一个实例，其中包含一个 UTextField。我为每一个都分配了一个标签，但我需要知道如何检索每个文本字段的文本值并将这些值分配给适当的字符串。

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("paymentCell", forIndexPath: indexPath) as! PaymentInfoCell

        cell.selectionStyle = .None
        cell.textField.delegate = self

        if indexPath.section == 0 {
            cell.textField.keyboardType = .NumberPad

            switch indexPath.row {
            case 0:
                cell.textField.placeholder = "Card Number"
                cell.textField.tag = 0
            case 1:
                cell.textField.placeholder = "Security Code"
                cell.textField.tag = 1
            case 2:
                cell.textField.placeholder = "Expiration Month"
                cell.textField.tag = 2
            case 3:
                cell.textField.placeholder = "Expiration Year"
                cell.textField.tag = 3
            default:
                break
            }
        } else {
            switch indexPath.row {
            case 0:
                cell.textField.placeholder = "First Name"
                cell.textField.keyboardType = .Default
                cell.textField.tag = 4

                if let firstName = sharedUser.userJSON!["firstName"] {
                    cell.textField.text = firstName as? String
                }
            case 1:
                cell.textField.placeholder = "Last Name"
                cell.textField.keyboardType = .Default
                cell.textField.tag = 5

                if let lastName = sharedUser.userJSON!["lastName"] {
                    cell.textField.text = lastName as? String
                }
            case 2:
                cell.textField.placeholder = "Phone Number"
                cell.textField.keyboardType = .PhonePad
                cell.textField.tag = 6
            case 3:
                cell.textField.placeholder = "Address"
                cell.textField.keyboardType = .EmailAddress
                cell.textField.tag = 7
            case 4:
                cell.textField.placeholder = "City"
                cell.textField.keyboardType = .Default
                cell.textField.tag = 8
            case 5:
                cell.textField.placeholder = "State"
                cell.textField.keyboardType = .Default
                cell.textField.tag = 9
            case 6:
                cell.textField.placeholder = "Zip Code"
                cell.textField.keyboardType = .NumberPad
                cell.textField.tag = 10
            default:
                break
            }
        }

        return cell
    }

我可以这样做，但这似乎不是最好的选择。

func textFieldShouldReturn(textField: UITextField) -> Bool {
        textField.resignFirstResponder()

        switch textField.tag {
        case 0:
            self.cardNumber = textField.text!
        case 1:
            self.securityCode = textField.text!
        case 2:
            self.expMonth = textField.text!
        case 3:
            self.expYear = textField.text!
        case 4:
            self.firstName = textField.text!
        case 5:
            self.lastName = textField.text!
        case 6:
            self.phoneNumber = textField.text!
        case 7:
            self.address = textField.text!
        case 8:
            self.city = textField.text!
        case 9:
            self.state = textField.text!
        case 10:
            self.zipCode = textField.text!
        default:
            break
        }

        return true
    }

Answer 1

您可以像这样简单地创建一个占位符数组

let placeholders = ["Card Number", "Security Name", ...]

那么你就可以使用这个不那么冗余的代码了

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("paymentCell", forIndexPath: indexPath) as! PaymentInfoCell

    cell.selectionStyle = .None
    cell.textField.delegate = self
    let index = indexPath.row + indexPath.section*6 //calculates the index of the text in the array
    cell.textField.placeholder = placeholders[index]
    cell.textField.tag = index

    if indexPath.section == 0 {
        cell.textField.keyboardType = .NumberPad
    } else {
        if indexPath.row == 0 {
            if let firstName = sharedUser.userJSON!["firstName"] {
                cell.textField.text = firstName as? String
            }
        } else if indexPath.row == 1 {
            if let lastName = sharedUser.userJSON!["lastName"] {
                cell.textField.text = lastName as? String
            }
        }
    }
    return cell
}

你可以对你的变量做同样的事情，把它们放在一个数组中，然后说

variable[textField.tag] = textField.text!