Create a simple user interface with code using Xamarin.iOS

Question

I need to create a simple login form (Username / Password) for demonstration using Xamarin.iOS, but I would prefer not to switch to Xcode for this at the moment.

Perhaps something similar to what you can do in other .NET technologies:

var panel = new Panel(); panel.Controls.Add(new Label("Username")); panel.Controls.Add(new TextBox("Password")); 

Is there a way to create simple interfaces in Xamarin for iOS programmatically? Or do you only need to create interfaces using Xcode?

Answer 1

Yes, you can create an interface through code. Using the Xcode constructor is completely optional.

 UIButton btn = new UIButton (UIButtonType.RoundedRect); btn.SetTitle ("Hello", UIControlState.Normal); btn.Frame = new RectangleF (50, 50, 50, 50); btn.TouchDown += delegate { UIAlertView alert = new UIAlertView("Hello", "Hello, Xamarin!", null, "OK"); alert.Show(); }; this.View.AddSubview (btn); 

For the data entry user interface, you can also consider using MonoTouch.Dialog .

Answer 2

Perhaps a little late in the game, but you tried using UIAlertView and then did:

 yourAlertView.AlertViewStyle = UIAlertViewStyle.LoginAndPasswordInput; 

A login popup will be created with the text fields already configured.

Answer 3

 @implementation MyViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } #pragma mark - View lifecycle /* // Implement loadView to create a view hierarchy programmatically, without using a nib. - (void)loadView { } */ // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. [self.view setBackgroundColor:[UIColor whiteColor]]; currentTF = [[UITextField alloc]init]; [self createLoginUI]; } - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:YES]; } -(void)createLoginUI { //For My Label UILabel *MyLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 340, 20)]; MyLabel.text = @"My Login Screen"; MyLabel.textAlignment = UITextAlignmentCenter; MyLabel.textColor = [UIColor blackColor]; MyLabel.backgroundColor=[UIColor cyanColor]; MyLabel.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [self.view addSubview:MyLabel]; //For Email Label UILabel *emailLabel = [[UILabel alloc]initWithFrame:CGRectMake(20, 40, 50, 20)]; emailLabel.text = @"Email:"; emailLabel.textColor = [UIColor blackColor]; emailLabel.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [self.view addSubview:emailLabel]; //For Email UITextField emailTF = [[UITextField alloc]initWithFrame:CGRectMake(85, 40, 200, 30)]; [emailTF setBorderStyle:UITextBorderStyleRoundedRect]; emailTF.delegate = self; emailTF.tag = 101; [self.view addSubview:emailTF]; //For Password Label UILabel *passwordLabel = [[UILabel alloc]initWithFrame:CGRectMake(20, 80, 100, 20)]; passwordLabel.text = @"Password:"; passwordLabel.textColor = [UIColor blackColor]; passwordLabel.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [self.view addSubview:passwordLabel]; //For Password UITextField passwordTF = [[UITextField alloc]initWithFrame:CGRectMake(105, 80, 180, 30)]; passwordTF.secureTextEntry = YES; passwordTF.delegate = self; passwordTF.tag = 102; [passwordTF setBorderStyle:UITextBorderStyleRoundedRect]; [self.view addSubview:passwordTF]; //For Login Button UIButton *loginBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [loginBtn setTitle:@"Login" forState:UIControlStateNormal]; loginBtn.frame = CGRectMake(120, 130, 50, 20); loginBtn.backgroundColor = [UIColor greenColor]; [loginBtn addTarget:self action:@selector(loginBtnClick) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:loginBtn]; //For Forgot Password Button UIButton *forgotPasswdBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [forgotPasswdBtn setTitle:@"Forgot Password" forState:UIControlStateNormal]; forgotPasswdBtn.frame = CGRectMake(30, 170, 120, 20); forgotPasswdBtn.backgroundColor = [UIColor greenColor]; [forgotPasswdBtn addTarget:self action:@selector(forgotPasswordBtnClick) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:forgotPasswdBtn]; //For sign up Button UIButton *signUpBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [signUpBtn setTitle:@"SignUp" forState:UIControlStateNormal]; signUpBtn.frame = CGRectMake(170, 170, 60, 20); signUpBtn.backgroundColor = [UIColor greenColor]; [signUpBtn addTarget:self action:@selector(signUpBtnClick) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:signUpBtn]; //For remember Me UIButton *remBtn = [UIButton buttonWithType:UIButtonTypeCustom]; [remBtn setImage:[UIImage imageNamed:@"uncheck.jpeg"] forState:UIControlStateNormal]; remBtn.frame = CGRectMake(90, 130, 20, 20); [remBtn addTarget:self action:@selector(remBtnClick) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:remBtn]; } -(void)loginBtnClick { [currentTF resignFirstResponder]; if ([self validateLoginScreen]) { //To clear textFields emailTF.text= @""; passwordTF.text = @""; //For Home View homeViewObj = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)]; [homeViewObj setBackgroundColor:[UIColor purpleColor]]; [self.view addSubview:homeViewObj]; //For Logout Button UIButton *logOutBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [logOutBtn setTitle:@"Logout" forState:UIControlStateNormal]; logOutBtn.frame = CGRectMake(170, 170, 60, 20); // logOutBtn.backgroundColor = [UIColor greenColor]; [logOutBtn addTarget:self action:@selector(logOutBtnClick) forControlEvents:UIControlEventTouchUpInside]; [homeViewObj addSubview:logOutBtn]; } } -(void)forgotPasswordBtnClick { UIAlertView *alertview=[[UIAlertView alloc]initWithTitle:@"Forgot Password" message:@"please enter sequrity qustion" delegate:self cancelButtonTitle:@"cancel" otherButtonTitles:@"ok", nil]; alertview.alertViewStyle=UIAlertViewStylePlainTextInput; [alertview textFieldAtIndex:0].delegate=self; [alertview show]; } -(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex { if(buttonIndex==1) { UIAlertView *alertview2=[[UIAlertView alloc]initWithTitle:@"Reset password" message:@"new password is send to your mail id" delegate:self cancelButtonTitle:nil otherButtonTitles:@"ok", nil]; [alertview2 show]; } } -(void)signUpBtnClick { //[currentTF resignFirstResponder]; viewobjsignup=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)]; [viewobjsignup setBackgroundColor:[UIColor grayColor]]; [self.view addSubview:viewobjsignup]; UILabel *MyLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 340, 20)]; MyLabel.text = @"Register Here"; MyLabel.textAlignment = UITextAlignmentCenter; MyLabel.textColor = [UIColor blackColor]; MyLabel.backgroundColor=[UIColor cyanColor]; MyLabel.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [viewobjsignup addSubview:MyLabel]; //username UILabel *usernmobj=[[UILabel alloc]initWithFrame:CGRectMake(20, 40, 100, 20)]; usernmobj.text=@"UserName"; usernmobj.textAlignment = UITextAlignmentCenter; usernmobj.textColor = [UIColor blackColor]; usernmobj.backgroundColor=[UIColor cyanColor]; usernmobj.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [viewobjsignup addSubview:usernmobj]; userTF = [[UITextField alloc]initWithFrame:CGRectMake(120, 40, 150, 30)]; //userTF.secureTextEntry = YES; userTF.delegate = self; // userTF.tag = 102; [userTF setBorderStyle:UITextBorderStyleRoundedRect]; [viewobjsignup addSubview:userTF]; userTF.returnKeyType=UIReturnKeyDone; //email id UILabel *Emailnmobj=[[UILabel alloc]initWithFrame:CGRectMake(20, 80, 80, 20)]; Emailnmobj.text=@"Email Id"; Emailnmobj.textAlignment = UITextAlignmentCenter; Emailnmobj.textColor = [UIColor blackColor]; Emailnmobj.backgroundColor=[UIColor cyanColor]; Emailnmobj.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [viewobjsignup addSubview:Emailnmobj]; EmailTF = [[UITextField alloc]initWithFrame:CGRectMake(120, 80, 150, 30)]; //EmailTF.secureTextEntry = YES; EmailTF.delegate = self; // EmailTF.tag = 102; [EmailTF setBorderStyle:UITextBorderStyleRoundedRect]; [viewobjsignup addSubview:EmailTF]; EmailTF.returnKeyType=UIReturnKeyDone; //password UILabel *passnmobj=[[UILabel alloc]initWithFrame:CGRectMake(20,120,100,20)]; passnmobj.text=@"Password"; passnmobj.textAlignment = UITextAlignmentCenter; passnmobj.textColor = [UIColor blackColor]; passnmobj.backgroundColor=[UIColor cyanColor]; passnmobj.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [viewobjsignup addSubview:passnmobj]; pwdTF = [[UITextField alloc]initWithFrame:CGRectMake(120, 120, 170, 30)]; pwdTF.secureTextEntry = YES; pwdTF.delegate = self; // pwdTF.tag = 102; [pwdTF setBorderStyle:UITextBorderStyleRoundedRect]; [viewobjsignup addSubview:pwdTF]; pwdTF.returnKeyType=UIReturnKeyDone; //conform password UILabel *comfobj=[[UILabel alloc]initWithFrame:CGRectMake(20,160,100,20)]; comfobj.text=@"Confpass"; //comfobj.textAlignment = UITextAlignmentCenter; comfobj.textColor = [UIColor blackColor]; comfobj.backgroundColor=[UIColor cyanColor]; comfobj.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [viewobjsignup addSubview:comfobj]; comfTF = [[UITextField alloc]initWithFrame:CGRectMake(120, 160, 180, 30)]; comfTF.secureTextEntry = YES; comfTF.delegate = self; // comfTF.tag = 102; [comfTF setBorderStyle:UITextBorderStyleRoundedRect]; [viewobjsignup addSubview:comfTF]; comfTF.returnKeyType=UIReturnKeyDone; //for dob UILabel *Dboobj=[[UILabel alloc]initWithFrame:CGRectMake(20, 190, 140, 20)]; Dboobj.text=@"DOB"; Dboobj.textAlignment = UITextAlignmentCenter; Dboobj.textColor = [UIColor blackColor]; Dboobj.backgroundColor=[UIColor cyanColor]; Dboobj.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [viewobjsignup addSubview:Dboobj]; //textfiels for date UITextField *dateobj=[[UITextField alloc]initWithFrame:CGRectMake(20, 210, 90, 30)]; [dateobj setBorderStyle:UITextBorderStyleRoundedRect]; dateobj.placeholder=@"Date"; [dateobj setKeyboardType:UIKeyboardTypeNumberPad]; dateobj.tag=105; dateobj.delegate=self; [viewobjsignup addSubview:dateobj]; dateobj.returnKeyType=UIReturnKeyDone; // //txtfield for DOB_date // UITextField * dob_dateLab=[[UITextField alloc]initWithFrame:CGRectMake(20, 270, 90, 30)]; // [dob_dateLab setBorderStyle:UITextBorderStyleRoundedRect]; // dob_dateLab.placeholder=@"Date"; // [dob_dateLab setKeyboardType:UIKeyboardTypeNumberPad]; // dob_dateLab.tag=104; // dob_dateLab.delegate = self; // [viewobjsignup addSubview:dob_dateLab]; //txtfield for month UITextField * monthobj=[[UITextField alloc]initWithFrame:CGRectMake(110, 210, 90, 30)]; [monthobj setBorderStyle:UITextBorderStyleRoundedRect]; monthobj.delegate = self; [monthobj setKeyboardType:UIKeyboardTypeNumberPad]; monthobj.tag=106; monthobj.placeholder=@"Month"; [viewobjsignup addSubview:monthobj]; monthobj.returnKeyType=UIReturnKeyDone; //txtfield for year UITextField * yearobj=[[UITextField alloc]initWithFrame:CGRectMake(200, 210, 90, 30)]; [yearobj setBorderStyle:UITextBorderStyleRoundedRect]; yearobj.delegate = self; [yearobj setKeyboardType:UIKeyboardTypeNumberPad]; yearobj.tag=107; yearobj.placeholder=@"Year"; [viewobjsignup addSubview:yearobj]; yearobj.returnKeyType=UIReturnKeyDone; //for label gender UILabel *genderobj=[[UILabel alloc]initWithFrame:CGRectMake(20, 240, 80, 20)]; genderobj.text=@"Gender"; genderobj.textAlignment = UITextAlignmentCenter; genderobj.textColor = [UIColor blackColor]; genderobj.backgroundColor=[UIColor cyanColor]; genderobj.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [viewobjsignup addSubview:genderobj]; //for male UILabel *maleobj=[[UILabel alloc]initWithFrame:CGRectMake(120, 240, 40, 20)]; maleobj.text=@"male"; maleobj.textAlignment = UITextAlignmentCenter; maleobj.textColor = [UIColor blackColor]; maleobj.backgroundColor=[UIColor cyanColor]; maleobj.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [viewobjsignup addSubview:maleobj]; //for female UILabel *femaleobj=[[UILabel alloc]initWithFrame:CGRectMake(200, 240, 80, 20)]; femaleobj.text=@"Female"; femaleobj.textAlignment = UITextAlignmentCenter; femaleobj.textColor = [UIColor blackColor]; femaleobj.backgroundColor=[UIColor cyanColor]; femaleobj.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; [viewobjsignup addSubview:femaleobj]; //for male radio but malebut=[UIButton buttonWithType:UIButtonTypeCustom]; [malebut setImage:[UIImage imageNamed:@"radio_check.jpeg"] forState:UIControlStateNormal]; //[malebut setImage:[UIImage imageNamed:@"radiobutton-checked.png"] forState:UIControlStateNormal]; malebut.frame = CGRectMake(160, 240, 20, 20); [malebut addTarget:self action:@selector(radioBtnClick_male) forControlEvents:UIControlEventTouchUpInside]; [viewobjsignup addSubview:malebut]; //For female radio but femalebut = [UIButton buttonWithType:UIButtonTypeCustom]; [ femalebut setImage:[UIImage imageNamed:@"radio_uncheck.jpeg"] forState:UIControlStateNormal]; femalebut.frame = CGRectMake(270, 240, 20, 20); [ femalebut addTarget:self action:@selector(radioBtnClick_female) forControlEvents:UIControlEventTouchUpInside]; [viewobjsignup addSubview:femalebut]; //For Save button UIButton * savebut = [UIButton buttonWithType:UIButtonTypeCustom]; [savebut setTitle:@"Save" forState:UIControlStateNormal]; savebut.titleLabel.backgroundColor=[UIColor blackColor]; savebut.frame = CGRectMake(90, 430, 70, 20); [savebut addTarget:self action:@selector(saveBtnClick) forControlEvents:UIControlEventTouchUpInside]; [viewobjsignup addSubview:savebut]; //For cancel button UIButton * cancelBtn = [UIButton buttonWithType:UIButtonTypeCustom]; cancelBtn.frame = CGRectMake(150, 430, 60, 20); [cancelBtn setTitle:@"Cancel" forState:UIControlStateNormal]; cancelBtn.titleLabel.backgroundColor=[UIColor blackColor]; cancelBtn.backgroundColor=[UIColor blackColor]; [cancelBtn addTarget:self action:@selector(cancelBtnClick1) forControlEvents:UIControlEventTouchUpInside]; [viewobjsignup addSubview:cancelBtn]; //register button // UIButton *registerbut=[UIButton buttonWithType:UIButtonTypeRoundedRect]; // [registerbut setTitle:@"Register" forState:UIControlStateNormal]; // [registerbut setFrame:CGRectMake(20,200,160,20)]; // [registerbut addTarget:self action:@selector(Registerclick) forControlEvents:UIControlEventTouchUpInside]; // [viewobjsignup addSubview:registerbut]; // //labal // myleb=[[UILabel alloc]initWithFrame:CGRectMake(20,160,140,20)]; // //comfobj.text=@" ConfermPassword"; // myleb.textAlignment = UITextAlignmentCenter; // myleb.textColor = [UIColor blackColor]; // myleb.backgroundColor=[UIColor cyanColor]; // myleb.font = [UIFont fontWithName:@"Arial-Bold" size:14.0]; // [self.view addSubview: myleb]; } -(void)radioBtnClick_female { [femalebut setImage:[UIImage imageNamed:@"radio_check.jpeg"] forState:UIControlStateNormal]; [malebut setImage:[UIImage imageNamed:@"radio_uncheck.jpeg"] forState:UIControlStateNormal]; } -(void)radioBtnClick_male { [femalebut setImage:[UIImage imageNamed:@"radio_uncheck.jpeg"] forState:UIControlStateNormal]; [malebut setImage:[UIImage imageNamed:@"radio_check.jpeg"] forState:UIControlStateNormal]; } -(void)logOutBtnClick { [homeViewObj removeFromSuperview]; } -(void)remBtnClick { } -(void)cancelBtnClick1 { [viewobjsignup removeFromSuperview]; } -(void)saveBtnClick { [currentTF resignFirstResponder]; [self validregister]; } -(void)validregister { if(userTF.text.length==00||pwdTF.text.length==00||comfTF.text.length==00) { [self showAlertMessage:@"Please enter all nesessary field"]; } else if([self emailValidation:EmailTF.text]==NO) { [self showAlertMessage:@"Please enter valid email address"]; EmailTF.text=@""; } else if([pwdTF.text isEqual:comfTF.text]==NO) { [self showAlertMessage:@"password mismatch"]; // userTf.text=@""; comfTF.text=@""; } else { EmailTF.text=@""; pwdTF.text=@""; [user setObject:EmailTF.text forKey:@"username plist"]; [user setObject:pwdTF.text forKey:@"password plist"]; [user synchronize]; [self showAlertMessage:@"You are REGISTERED now"]; [viewobjsignup removeFromSuperview]; } } //-(void)Registerclick //{ // UIAlertView *alertview1 = [[UIAlertView alloc]initWithTitle:@"Welcome" message:@"Your registration is successful..!" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; // [alertview1 show]; // [viewobjsignup removeFromSuperview]; //} // #pragma mark Validation Method -(BOOL)validateLoginScreen { if (emailTF.text.length==0) { [self showAlertMessage:@"Please enter email address"]; return NO; } else if ([self emailValidation:emailTF.text]==NO) { [self showAlertMessage:@"Please enter valid email address"]; return NO; } else if (passwordTF.text.length==0) { [self showAlertMessage:@"Please enter password "]; return NO; } return YES; } -(void)showAlertMessage:(NSString *)msg { UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Note" message:msg delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; [alert show]; } -(BOOL) emailValidation:(NSString *)emailTxt { NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"; NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex]; return [emailTest evaluateWithObject:emailTxt]; } #pragma mark TextField Delegates - (BOOL)textFieldShouldReturn:(UITextField *)textField { // if(textField.tag==101) // { // [passwordTF becomeFirstResponder]; // } // else if(textField.tag==102) // { // [passwordTF resignFirstResponder]; // } [currentTF resignFirstResponder]; return YES; } -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [currentTF resignFirstResponder]; } -(void)textFieldDidBeginEditing:(UITextField *)textField { currentTF = textField; [self animateTextField:textField up:YES]; } - (void)textFieldDidEndEditing:(UITextField *)textField { currentTF = textField; [self animateTextField:textField up:NO]; } -(void)animateTextField:(UITextField*)textField up:(BOOL)up { int movementDistance = 0; // tweak as needed if (textField.tag==105||textField.tag ==106||textField.tag==107) { movementDistance = -130; } else { movementDistance = 00; } const float movementDuration = 0.3f; // tweak as needed int movement = (up ? movementDistance : -movementDistance); [UIView beginAnimations: @"animateTextField" context: nil]; [UIView setAnimationBeginsFromCurrentState: YES]; [UIView setAnimationDuration: movementDuration]; self.view.frame = CGRectOffset(self.view.frame, 0, movement); [UIView commitAnimations]; } - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. // eg self.myOutlet = nil; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } 

Answer 4

Xamarin 5.10:

  UIButton sampleButton1; UITextField sampleTextField1; UITextField sampleTextField2; public void addUIButtonToView () { this.sampleButton1 = new UIButton (UIButtonType.RoundedRect); sampleButton1.Frame = new CoreGraphics.CGRect (10f, 100f, 300f, 50f); this.sampleButton1.SetTitle ("Sample Button", UIControlState.Normal); this.sampleButton1.SetNeedsLayout (); sampleButton1.TouchUpInside += OnSpeakButtonTapped; this.View.AddSubview (sampleButton1); } void OnSpeakButtonTapped (object sender, EventArgs e) { // This is the event handler for the actual UIButton TouchUpInside event. Console.WriteLine ("button tapped"); } public void addUITextFieldToView () { //Initiate UITextField Delegates sampleTextField1 = new UITextField (); sampleTextField1.Frame = new CoreGraphics.CGRect (10f, 100f, 300f, 50f); //sampleTextField1.Text = "This is Xamarin iOS TextField"; sampleTextField1.BackgroundColor = UIColor.LightGray; sampleTextField1.Alpha = 1.0f; sampleTextField1.TextAlignment = UITextAlignment.Center; sampleTextField1.Font = UIFont.FromName (name: "Arial", size: 15f); sampleTextField1.Placeholder = "Enter text here"; sampleTextField1.KeyboardType = UIKeyboardType.EmailAddress; sampleTextField1.ReturnKeyType = UIReturnKeyType.Default; sampleTextField1.MinimumFontSize = 17f; sampleTextField1.AdjustsFontSizeToFitWidth = true; //Additional sampleTextField2 = new UITextField (); sampleTextField2.Frame = new CoreGraphics.CGRect (this.View.Frame.X + 5, this.View.Frame.Y + 250, this.View.Frame.Width - 10, this.View.Frame.Height / 3); sampleTextField2.BackgroundColor = UIColor.FromPatternImage (UIImage.FromFile ("Real-Estate_4.jpg")); sampleTextField2.AdjustsFontSizeToFitWidth = true; sampleTextField2.MinimumFontSize = 12f; //Setting Boarder and curved edges sampleTextField2.Layer.BorderWidth = 1f; sampleTextField2.Layer.CornerRadius = 5f; sampleTextField2.Layer.BorderColor = UIColor.Black.CGColor; //Shadows sampleTextField2.Layer.ShadowColor = UIColor.DarkGray.CGColor; sampleTextField2.Layer.ShadowOffset = new CoreGraphics.CGSize (3f, 3f); sampleTextField2.Layer.ShadowOpacity = 0.3f; sampleTextField2.Layer.ShadowRadius = 3f; this.View.AddSubview (sampleTextField1); this.View.AddSubview (sampleTextField2); //Adding Delegate Methods this.enableUITextFieldDelegateMethods (); } void enableUITextFieldDelegateMethods () { this.sampleTextField1.ShouldReturn += (textField) => { sampleTextField2.BecomeFirstResponder (); textField.ResignFirstResponder (); return true; }; this.sampleTextField1.ShouldBeginEditing += (textField) => { //Write here return true; }; this.sampleTextField1.ShouldEndEditing += (textField) => { //Write here return true; }; this.sampleTextField1.ShouldClear += (textField) => { //Write here return true; }; this.sampleTextField1.ShouldChangeCharacters = (UITextField txt, NSRange range, string sampleTxt) => { var newLength = txt.Text.Length + sampleTxt.Length - range.Length; return newLength <= 9; }; }