Xamarin Certification Xamarin.iOS Development 3

Question 1

Which Xamarin.iOS class is used to present a modal view controller?

Accepted Answer

PresentViewController

Answer

PresentViewController is called on a UIViewController to present another controller modally.

Question 2

What is a XIB file in the context of Xamarin.iOS?

Accepted Answer

An Interface Builder file defining a single view or window

Answer

A XIB (nib) file is an Interface Builder document defining the layout of a single view or UI component.

Question 3

In Xamarin.iOS, what is used to bind third-party Objective-C libraries for use in C# code?

Accepted Answer

Binding Projects

Answer

Xamarin.iOS Binding Projects wrap Objective-C libraries with C# API definitions using [BaseType] and [Export] attributes.

Question 4

Which gesture recognizer class in Xamarin.iOS detects tap gestures?

Accepted Answer

UITapGestureRecognizer

Answer

UITapGestureRecognizer is attached to a view to detect single or multiple tap gestures.

Question 5

How do you share data between view controllers in Xamarin.iOS using a segue?

Accepted Answer

Override PrepareForSegue and set destination controller properties

Answer

PrepareForSegue provides a reference to the destination view controller so you can set its properties before transition.

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