Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...


Swift defines the AnyObject type alias to represent instances of any reference type, and it’s internally defined as a protocol.

Consider the following code:

var array = [AnyObject]()

struct Test {}

array.append(Test())

This code generates a compilation error, with the following error message:

Type 'Test' does not conform to protocol 'AnyObject'

The failure is obvious because a struct is a value and not a reference type, and as such it doesn’t implement and cannot be cast to the AnyObject protocol.

Now consider the following code:

var array = [AnyObject]()

array.append(1)

array.append(2.0)

array.append("3")

array.append([4, 5, 6])

array.append([7: "7", 8: "8"])

struct Test {}

array.append(Test())

The array array is filled in with values of type respectively int, double, string, array and dictionary. All of them are value types and not reference types, and in all cases no error is reported by the compiler. Why?



Swift defines the AnyObject type alias to represent instances of any reference type, and it’s ..

Answer / iosraj

The reason is that swift automatically bridges:

number types to NSNumber

strings to NSString

arrays to NSArray

dictionaries to NSDictionary

which are all reference types.

Is This Answer Correct ?    1 Yes 0 No

Post New Answer

More Apple iOS Swift Interview Questions

How many types of closures are there in swift?

0 Answers  


Explain some common execution states in ios?

0 Answers  


What is the swift main advantage?

0 Answers  


Who invented swift code?

0 Answers  


What is swift programming?

0 Answers  


What is ios swift?

0 Answers  


How is swift different from objective-c?

0 Answers  


Why swift is the best language?

0 Answers  


Explain the usage of class and benefits of inheritance.

0 Answers  


Is swift a functional language?

0 Answers  


What is the significance of “?” In swift?

0 Answers  


What are properties in swift?

0 Answers  


Categories