Swift中的XLForm验证

Question

我正在使用这个简单的表单来处理XLForm。代码是用Swift编写的。我有一个关于验证的问题-我想使用XLForm的内部验证器来验证电子邮件和其他字段，但我不知道如何使用。我只需要检查其他字段是否填充了数据。手册是用Obj-C编写的，我在Swift中找不到任何示例。有人能给我一些如何实现它的提示吗？我尝试使用userEmail.required = true，但它不起作用。我正在寻找一些在saveTapped方法中实现的方法，在我将发送表单之前验证字段，但我无法找到任何解决方案。

class FormViewController: XLFormViewController {


required init(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder);
    self.setupForm()
}

override func viewDidLoad() {
    super.viewDidLoad()
}
@IBAction func saveTapped(sender: AnyObject) {


            println(form.formRowWithTag("userEmail").value as? String)
            println(form.formRowWithTag("userPassword").value as? String)
            println(form.formRowWithTag("userName").value as? String)

}

private func setupForm() {

    let form = XLFormDescriptor(title: "Registration")

    // Section 1
    let section1 = XLFormSectionDescriptor.formSection() as XLFormSectionDescriptor
    form.addFormSection(section1)

    let userEmail = XLFormRowDescriptor(tag: "userEmail", rowType: XLFormRowDescriptorTypeText, title: "Email")
    userEmail.required = true
    section1.addFormRow(userEmail)

    let userPassword = XLFormRowDescriptor(tag: "userPassword", rowType: XLFormRowDescriptorTypePassword, title: "Password")
    userPassword.required = true
    section1.addFormRow(userPassword)


    let userName = XLFormRowDescriptor(tag: "userName", rowType: XLFormRowDescriptorTypePassword, title: "First name")
    userName.required = true
    section1.addFormRow(userName)


    self.form = form
}

}

Answer 1

    let validationErrors:NSArray = self.formValidationErrors()
    if (validationErrors.count > 0) {
        var errorString = ""
        for error in validationErrors {
            errorString += error.localizedDescription + "\n"
        }
        UIAlertView(title: "Error! Please check again.", message: errorString, delegate: nil, cancelButtonTitle: "OK").show()
        return false
    }

将此代码放入您的saveTapped