Swift as, as!, as? Differentiate between t.type and dynamic types

As

1. The compiler checks the legality of the type conversion; static

Let cell = Collectionview.dequeuereusablecell (Withreuseidentifier:shoppinglist[indexpath.section], For:indexpath as Indexpath)

Let k = cell as Indexpath

Cannot convert value of type ' Uicollectionviewcell ' to type ' indexpath ' in coercion

2, with switch: type detection

as! As?

Type dynamic transformation;

Convert any type to a specific type, type system check.

When a type is a function parameter, it belongs to the dynamic type;

Type systems and compilers are closely related.

When initializing an instance with a type, the compiler requires that the type qualification must be static, as opposed to a function call.

Therefore, the type parameter that is passed as a type must be qualified for initialization of the instance.

(Type as! Hmloginmodel.type). Init ()

Extension Observabletype where E = = Response {

Public Func mapmodel<t:handyjson> (_ Type:t.type), observable<t> {

Return FLATMAP {response-observable<t> in

(Type as! Hmloginmodel.type). Init ()

Return Observable.just (Response.mapmodel (t.self))

}

}

}

Swift as, as!, as? Differentiate between t.type and dynamic types