如何从TableView单元格检索文本字段值

Luke 发表于 Dev

路加

我有2个单元格的tableview。两个单元格都有一个文本字段和一个标签。文本字段采用用户名/电子邮件地址和密码的值。

var emailAddress: String?
var password: String?

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier(cellID) as! TextFieldCell

    cell.label.text = loginOptions[indexPath.row]
    cell.textField.placeholder = loginOptions[indexPath.row]

    if indexPath.row == 0 {
        emailAddress = cell.textField.text!
    }
    if indexPath.row == 1 {
        password = cell.textField.text!
    }

    return cell
}

以下是检查文本框中是否有任何文本的功能，如果没有，则显示提示填写所有字段的警报控制器。

func signInButtonTapped() {

    if emailAddress!.isEmpty || password!.isEmpty {

        let alert = UIAlertController(title: "Alert", message: "all fields are required to be filled in", preferredStyle: .Alert)
        let action = UIAlertAction(title: "OK", style: .Default, handler: nil)
        alert.addAction(action)
        self.presentViewController(alert, animated: true, completion: nil)
    }

}

如何从单元格内部检索文本字段值以检查它们是否为空？上面的代码不起作用，因为文本字段始终返回空。虽然，希望可以看到我正在努力实现的目标

穆扎希德

我猜你的tableView只有一部分。那你可以这样

func signInButtonTapped() {
        let indexpathForEmail = NSIndexPath(forRow: 0, inSection: 0)
        let emailCell = tableView.cellForRowAtIndexPath(indexpathForEmail)! as TextFieldCell

        let indexpathForPass = NSIndexPath(forRow: 1, inSection: 0)
        let passCell =  tableView.cellForRowAtIndexPath(indexpathForPass)! as TextFieldCell

        if emailCell.textField.placeholder!.isEmpty || passCell.textField.placeholder!.isEmpty {

            let alert = UIAlertController(title: "Alert", message: "all fields are required to be filled in", preferredStyle: .Alert)
            let action = UIAlertAction(title: "OK", style: .Default, handler: nil)
            alert.addAction(action)
            self.presentViewController(alert, animated: true, completion: nil)
        }
    }