Swift Classes and structures

Classes and structs have a lot in common:

Defining properties to store data

Define method Execution function handling

Define subscript to access their values by subscript

Initialize their state

Extend its functionality with extensions (Extension)

Compliance Agreement (PROTOCOL). The protocol provides a specific standard

Function

Analogy structure multi-out function:

can inherit another class

You can check the type of the execution period object

destructor Frees resources

reference count agrees that a class instance has multiple references  

definition of class and struct body  

define classes and struct bodies:  

Class SomeClass {//class definition goes here} struct Somestructure {//Structure definition goes here}

Instance:

struct Resolution {var width= 0 var height =0} class Videomode {var Resolution = Resolution () var interlaced =falsevarfr Amerate = 0.0 var name:string?}

Instantiation of classes and struct bodies

struct Resolution {var width= 0 var height =0}class videomode {var Resolution = Resolution () var interlaced =falsevarfram Erate = 0.0var name:string?
}let someresolution= Resolution ()//let               someresolution                    = Resolution (width:10,height:20) Let somevideomode= Videomode ()

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Swift Classes and structures