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Actionscript klase i podklase - boli glava :)

 
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nemogirl



Joined: 27 Oct 2004
Posts: 386
Location: istra

PostPosted: 14.03.2008 13:53    Post subject: Actionscript klase i podklase - boli glava :) Add user to your forum ignore list Reply with quote

I've got a problem rrrrrrrah

u jednoj klasi A uvlacim xml podatke. Tu instanciram objekt tipa klase B i prosljeđujem te podatke.
Code:

var objekt:B = new B(podaci);


E sad, klasa B je podklasa klase C
Code:

class B extends C{..}


ja bi htjela u konstruktoru klase C koristit podatke iz klase A, koje prosljeđujem kao parametar prilikom instanciranja objekta klase B.
kako da ti podaci stignu do klase C?

nadam se da nisam zakomplicirala... help!
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gorrc



Joined: 12 Jul 2007
Posts: 87

PostPosted: 14.03.2008 16:20    Post subject: Re: Actionscript klase i podklase - boli glava :) Add user to your forum ignore list Reply with quote

class A
{
var loadXML = lodiranjeXML
var classB = new ClassB(loadXML)
}

class C
{
public function C(xml) /// pozivanje konstruktora
{
//bla bba
}
}

class B extends C
{
public function B (xml)
{
super(xml)
}
}

U biti s naredbom super pozivaš konstruktor klase koja je extended.
To ako ne učiniš Flash Player će sam učiniti , no ipak je bolje sam pozvati ili explicit

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fun.ky



Joined: 05 Jan 2006
Posts: 365
Location: Mostar

PostPosted: 14.03.2008 16:23    Post subject: Add user to your forum ignore list Reply with quote

Hmm... neznam jesam li dobro skontao al ako klasa b naslijeđuje od klase c, onda sve one stvari (metode, propertie) koje ne override-aš u klasi b će ti biti u klasi c. I to je to.... Smile

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gorrc



Joined: 12 Jul 2007
Posts: 87

PostPosted: 14.03.2008 17:01    Post subject: Add user to your forum ignore list Reply with quote

fun.ky wrote:
Hmm... neznam jesam li dobro skontao al ako klasa b naslijeđuje od klase c, onda sve one stvari (metode, propertie) koje ne override-aš u klasi b će ti biti u klasi c. I to je to.... Smile


Nažalost to nije tako, ako B nasljeđuje od C onda ono što je u B neće biti C ali ono što je u C biti će i u B.
To je bit nasljeđivanja.

Da bi nešto novo došlo u C moraš raditi override ili pozvati klasu koju se nasljeđuje pomoću super kao što smo učinili u gornjem slučaju.

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fun.ky



Joined: 05 Jan 2006
Posts: 365
Location: Mostar

PostPosted: 15.03.2008 19:15    Post subject: Add user to your forum ignore list Reply with quote

Neznam jesam li razumio pitanje, al ono što sam napisao je ispravno , evo primjer u C#

Code:
public class C
{
    public virtual void CallMe()
    {
        MessageBox.Show("Hello from C");
    }

    public void CallMeMe()
    {
        MessageBox.Show("Hello from C");
    }
}

public class B : C
{

    public override void CallMe()
    {
        MessageBox.Show("Hello from B");
    }
}

//Sada pozovemo metode na objektu tipa B

            B objB = new B();
            objB.CallMe();
            objB.CallMeMe();


rezultat je :
Hello From B
Hello From C

E sada ono što je sporno jeste dali sam ja dobro shvatio pitanje...

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gorrc



Joined: 12 Jul 2007
Posts: 87

PostPosted: 15.03.2008 23:00    Post subject: Add user to your forum ignore list Reply with quote

[quote="fun.ky"]Hmm... neznam jesam li dobro skontao al ako klasa b naslijeđuje od klase c, onda sve one stvari (metode, propertie) koje ne override-aš u klasi b će ti biti u klasi c. I to je to.... Smile[/quote

Nemoj se ljutiti ali ti si ovdje napisao da klasa b nasljeđuje od c i da sve metode i property koji su u klasi B će biti i u klasi C

evo primjera.

class c
{
bla bla
}]

class b extends c
{
function static zoviMe()
{
bla bla
}
}

var newClassC:C= new C();

c.zoviMe() // izbacuje grešku.

U ovom tvojem primjeru ti si napravio override super klase, sukladno tome što sam ranije napomenuo da klasa koja nasljeđuje može ubacivati, mjenjati super klasu samo preko override i super.
Da si napravio novu metodu u B klasi (ne override ili super) ti ne bi mogao pozvati tu methodu u C klasi. Mislim da je u tome stvar.

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fun.ky



Joined: 05 Jan 2006
Posts: 365
Location: Mostar

PostPosted: 17.03.2008 07:13    Post subject: Add user to your forum ignore list Reply with quote

Znam da smo offtopic, al mislim da je momak dobio odgovor, a što se tieč nas dvojice nismo se razumili Smile ja sam govorio ovo što sam sa code-om napisao, trebao sam reći sve metode iz klase c koje se ne override-a u klasi b Wink

Al nevažno, myth busted Smile

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nemogirl



Joined: 27 Oct 2004
Posts: 386
Location: istra

PostPosted: 17.03.2008 11:17    Post subject: Add user to your forum ignore list Reply with quote

hvala, gorrc i funky!
momak je dobio odg! Very Happy

probavala sam i ja sa super ali ovako
super.C(xml)
Rolling Eyes
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fun.ky



Joined: 05 Jan 2006
Posts: 365
Location: Mostar

PostPosted: 17.03.2008 19:50    Post subject: Add user to your forum ignore list Reply with quote

Pardon, djevojka:)

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