A form which we may use in multiple applications but each time that is Sign up or Registration form.

Below is the sample code of simple registration form

Below form contains the fields like

-First Name

-Last Name

-Email

-Password & Confirm Password

regform
Code

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var txtFName: UITextField!
@IBOutlet weak var txtLName: UITextField!
@IBOutlet weak var txtEmailID: UITextField!
@IBOutlet weak var txtPassword: UITextField!
@IBOutlet weak var txtConfirmPassword: UITextField!

override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}

@IBAction func btnRegistration(sender: AnyObject)
{
if(countElements(txtFName.text) == 0){
var alert : UIAlertView = UIAlertView(title: "Oops!", message: "Please enter your first name.",
delegate: nil, cancelButtonTitle: "OK")
alert.show()

}else if (countElements(txtLName.text) == 0){
var alert : UIAlertView = UIAlertView(title: "Oops!", message: "Please enter your last name.",
delegate: nil, cancelButtonTitle: "OK")
alert.show()

}else if (countElements(txtEmailID.text) == 0){
var alert : UIAlertView = UIAlertView(title: "Oops!", message: "Please enter your email id.",
delegate: nil, cancelButtonTitle: "OK")
alert.show()

}else if !isValidEmail(txtEmailID.text){
var alert : UIAlertView = UIAlertView(title: "Oops!", message: "Please enter your correct email id.",
delegate: nil, cancelButtonTitle: "OK")
alert.show()

}else if (countElements(txtPassword.text) == 0){
var alert : UIAlertView = UIAlertView(title: "Oops!", message: "Please enter your password.",
delegate: nil, cancelButtonTitle: "OK")
alert.show()

}else if (countElements(txtConfirmPassword.text) != countElements(txtPassword.text)){
var alert : UIAlertView = UIAlertView(title: "Oops!", message: "Confirmed password not matched please try again.",
delegate: nil, cancelButtonTitle: "OK")
alert.show()

}else{
var alert : UIAlertView = UIAlertView(title: "User Registration!", message: "Your Registration is successfully.",
delegate: nil, cancelButtonTitle: "OK")
alert.show()

}

}



func textFieldShouldReturn(textField: UITextField) -> Bool
{
if(textField.returnKeyType == UIReturnKeyType.Done)
{
textField .resignFirstResponder()
}
else
{
var txtFld : UITextField? = self.view.viewWithTag(textField.tag + 1) as? UITextField;
txtFld?.becomeFirstResponder()
}
return true
}

func isValidEmail(testStr:String) -> Bool {
let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"

var emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
let result = emailTest.evaluateWithObject(testStr)
return result
}

}