Create An Alert Dialog In Xamarin iOS App

Introduction

Xamarin is a platform to develop cross-platform and multi-platform apps (for example, Windows phone, Android, iOS). In Xamarin platform, the code sharing concept is used. In Xamarin Studio, Visual Studio is also available.

Prerequisites

• Xamarin Studio.
• Xcode.

The steps given below are required to be followed in order to create an Alert dialog in Xamarin iOS, using Xamarin Studio.

Step 1

Go To Xamarin Studio.

Click New Solution—> select iOS—>select App--> Choose Sngle View App. Afterwards, click "Next".

 

Step 2

In this step, configure your app. Give the app name (Ex:sample), Organization Identifier. Afterwards, click "Next".

 

step 3

In this step, give your project name (Ex: Sample) and solution name (Ex: Sample). Give path to your project. Afterwards, click "Create".

 

Step 4

Subsequently, go to the Solution. In there, get all the files and sources in your project. Now, select Main.storyboard and double click to open Main.storyboard page.

 

Step 5

After opening the Main.storyboard, you can design this page, as per your desire.

 

Step 6

Now, go to the toolbox window and get access to all types of the tools and controls. You need to go to the toolbox window. Now, scroll down and you will see all the tools and controls. You need to drag and drop the button.

Next, you need to align the button using constraints.

 

Step 7

Now, go to the Properties window. Select the Button and give a name (Ex:btnAlert).

 

Step 8

You need to drag and drop the Label.

Next, you need to align the label, using constraints.

 

Step 9

Now, go to the properties window. Select the Label and give a name (Ex:lblDisplay).

 

Step 10

In this step, go to the ViewController.cs page and write the code given below.

ViewController.cs

using System;
using UIKit;
namespace XamariniOSAlert {
    public partial class ViewController: UIViewController {
        protected ViewController(IntPtr handle): base(handle) {
            // Note: this .ctor should not contain any initialization logic.
        }
        public override void ViewDidLoad() {
            base.ViewDidLoad();
            btnAlert.TouchUpInside += ((sender, e) => {
                var okCancelAlertController = UIAlertController.Create("Xamarin Alert", "Do You Love Xamarin", UIAlertControllerStyle.Alert);
                okCancelAlertController.AddAction(UIAlertAction.Create("Yes", UIAlertActionStyle.Default, alert => lblDisplay.Text = ("Yes I Love Xamarin")));
                okCancelAlertController.AddAction(UIAlertAction.Create("No", UIAlertActionStyle.Cancel, alert => lblDisplay.Text = ("No I Don't Love Xamarin")));
                PresentViewController(okCancelAlertController, true, null);
            });
        }
        public override void DidReceiveMemoryWarning() {
            base.DidReceiveMemoryWarning();
            // Release any cached data, images, etc that aren't in use.
        }
    }
}

 

Step 11

Now, go to Run option, choose Debug, and you will see the list of iPhone and iPad simulators available. You can choose any one simulator and run it.

 

Output

After a few seconds, the app will start running on your iPhone simulator. You will see your app working successfully.

 

You can click "Click Here". The button alert will be shown.

 

Now, the Alert will work successfully. You can choose any option (Yes or No).

 

Summary

This was the process of creating an Alert dialog in Xamarin iOS application, using Xamarin Studio.