Hit test helps us to understand if a view can be interactive with user. func hitTest(_ point: CGPoint,with event: UIEvent? ) -> UIView? When the touch event is performed by the user, the system calls this function to trigger the touch or gesture recognizer an returns the frontmost view interacted…

In this article, I would like to talk about ways of persisting data in iOS apps. Persistence in computer science is defined as ‘the characteristic of state that outlives the process that created it’. Data persistence means storing any type of data on disk so that the same data can…

Initializers might work or might not. For the case of not working, we can return nil. We write a failable initializer by placing a question mark after the init keyword (init?) init?() init!() It solves the confusion between Factory methods and initializers. We can’t create an failable and non failable initializers with the same name and parameter. Initializers normally don’t return a value but we can add a fail state by returning nil.

In iOS 10.3, Apple added a function that allows us to dynamically change the icon of our application. The Apple documentation states that: supportsAlternateIcons — It is readonly. A Boolean value indicating whether the app is allowed to change its icon. …

CoreML allows us to develop a Machine Learning project on iOS. Applications developed using CoreML can perform all kinds of tasks such as problem solving, image recognition using trained models. We can do this with Xamarin.iOS. The first thing you have to do for this is to set ourselves a model. We download a model from the link below: https://developer.apple.com/machine-learning/ We then have to convert it to mlmodelc type to add Xamarin project. We can use Xcode or terminal for this. We should right click on folder that include our CoreML model and then select New Terminal at Folder. After that write tihs command in terminal;

We can use MessagingCenter for this. In your first page, subscribe a message: public FirstPage() { MessagingCenter.Subscribe<SecondPage>(this, "StartProgress", (sender) => { StartProgress(); }); } public void StartProgress() { //do progression here //and set Progress bar } In second page send the message: private void Onpress(s, e) { MessagingCenter.Send(this, "StartProgress"); Navigation.PopToRootAsync(); }

In this article, I will first examine the FaceID and TouchID authentication methods and then I will talk about how to add them to our Xamarin Forms applications. iOS Biometric Authentication Before we move on to how to use these in practice, let’s see these technologies and how they work on iOS. Biometric…

We can force the pages into Landscape mode at runtime as needed. UWP, iOS and Android require different approach, so here’s how we can handled it. Xamarin.Forms: public partial class MyAwesomePage : ContentPage { public MyAwesomePage() { InitializeComponent(); } protected override void OnAppearing() { base.OnAppearing(); MessagingCenter.Send(this, "SetLandscapeModeOn"); }

We can create a simple round buttton with font icon in Xamarin.Forms application like below: Add font family to your shared app as an EmbeddedResource Register the font file with the assembly, in a file such as AssemblyInfo.cs, using the ExportFont attribute. using Xamarin.Forms; using Xamarin.Forms.Xaml; [assembly: XamlCompilation(XamlCompilationOptions.Compile)] [assembly: ExportFont(“fa-solid-900.ttf”, Alias = “fa-solid”)]