Actionscript 3 Fehler # 1009 bei globalen $ init()

Question

Also ich habe gesucht, fand einige ähnliche Fehler, aber leider keine Lösung für das Problem. Ich schreibe ein iPad-Spiel, und zur Optimierung habe ich eine Asset-Referenzklasse namens R erstellt, die dem Beispiel eines Tutorials von gotoAndLearn folgt.

Mein Feuer Fehler, wenn ich die erste statische BitmapData- von R zuzugreifen versuchen, und verweist seltsam auf der Klassendeklaration line:

public final class R 

:

TypeError: Error #1009: Cannot access a property or method of a null object reference. 

at Game::R$cinit() 

at global$init()[...\Game\R.as:6] 

at Game::Background/init()[...\Game\Background.as:33] 

Der Code von R an der Linie 6 ist dies

Für eine bessere Sichtbarkeit, hier ist die vollständige Erklärung von R und die ersten Zeilen, die, die ich versuchen, zuzugreifen:

package Game 
{ 
import flash.display.BitmapData; 
import flash.geom.Rectangle; 

public final class R 
{ 
    /** Embed source asset in a class. **/ 
    [Embed (source= "Assets/Backgrounds/lvl1.png")] 
    public static var L1Background:Class; 
    /** Make a BitmapData out of the latter class. **/ 
    public static var _l1Background:BitmapData= new L1Background().bitmapData; 

Das folgende der Klasse ist meistens die gleiche Sache, die sich immer und immer wieder wiederholt, um alle Werte zu laden. Auch hier ist der Code, der R._l1Background aufruft. Es ist die Initialisierung der Hintergrundklasse.

private function init(e:Event):void 
    { 
     this.removeEventListener(Event.ENTER_FRAME,init); 

     switch (level) 
     { 
      case 0: 
       // image is a class property to keep track of the BitmapData to use later. 
       image= R._l1Background; 
      break; 

      default: 
       image= R._l1Background; 
      break; 
     } 
    } 

Wenn ich versuche, den Zugang zu R._l1Background kommentieren (wodurch diese Funktion nichts tun) Ich bekomme immer noch Ähnliche Fehler beim Zugriff auf andere Funktionen R Eigenschaften versuchen. Ich könnte (höchstwahrscheinlich) andere Fehler in meinem Code haben, aber im Moment hält mich das davon ab, den Rest des Spiels zu debuggen.

Ich werde meine Lehrer darüber befragen und jede Spur oder Lösung, die sie hervorbringen, sowie die Ergebnisse meiner eigenen Forschungen weiterleiten. Vielen Dank im Voraus für jede Hilfe.

Edit: nach einer Anfrage, hier sind meine kompletten Klassen

Meine komplette Referenzklasse (R-Klasse) sind wie folgt:

package Game 
{ 
import flash.display.BitmapData; 
import flash.geom.Rectangle; 

public final class R 
{ 
    /** Class of the level1 background asset. In order to use it, create a 
    * new instance and convert it to bitmapData. **/ 
    [Embed (source= "Assets/Backgrounds/lvl1.png")] 
    public static const L1Background:Class; 
    /** BitmapData of the image. **/ 
    public static var _l1Background:BitmapData= new L1Background().bitmapData; 

    /** Class of the players' HUD asset. In order to use it, create a new 
    * instance and convert it to bitmapData. **/ 
    [Embed (source= "Assets/HUD/playerHud1.png")] 
     public static const Hud1:Class; 
    /** BitmapData of the image. **/ 
    public static var _hud1:BitmapData= new Hud1().bitmapData; 

    /** Class of the points counters asset. In order to use it, create a new 
    * instance and convert it to bitmapData. **/ 
    [Embed (source= "Assets/HUD/counter.png")] 
     public static const Counter1:Class; 
    /** BitmapData of the image. **/ 
    public static var _counter1:BitmapData= new Counter1().bitmapData; 

    /** Class of the racquet 1 asset. In order to use it, create a new 
    * instance and convert it to bitmapData. 
    * This is a yellow up-pointed racquet. **/ 
    [Embed (source= "Assets/Players/racq1.png")] 
     public static const Racquet1:Class; 
    /** BitmapData of the image. **/ 
    public static var _racquet1:BitmapData= new Racquet1().bitmapData; 

    /** Class of the racquet 2 asset. In order to use it, create a new 
    * instance and convert it to bitmapData. 
    * This is a red down-pointed racquet. **/ 
    [Embed (source= "Assets/Players/racq2.png")] 
     public static const Racquet2:Class; 
    /** BitmapData of the image. **/ 
    public static var _racquet2:BitmapData= new Racquet2().bitmapData; 

    /** Class of the twinky 1 asset. In order to use it, create a new 
    * instance and convert it to bitmapData. 
    * This is a yellow up-pointed twinky. **/ 
    [Embed (source= "Assets/Players/twinky1.png")] 
     public static const Twinky1:Class; 
    /** BitmapData of the image. **/ 
    public static var _twinky1:BitmapData= new Twinky1().bitmapData; 

    /** Class of the twinky 2 asset. In order to use it, create a new 
    * instance and convert it to bitmapData. 
    * This is a red down-pointed twinky. **/ 
    [Embed (source= "Assets/Players/twinky2.png")] 
     public static const Twinky2:Class; 
    /** BitmapData of the image. **/ 
    public static var _twinky2:BitmapData= new Twinky2().bitmapData; 

    /** Class of the "back" button asset. In order to use it, create a new 
    * instance and convert it to bitmapData. **/ 
    [Embed (source= "Assets/HUD/bt_back.png")] 
     public static const BtBack:Class; 
    /** BitmapData of the image. **/ 
    public static var _btBack:BitmapData= new BtBack().bitmapData; 

    /** Class of the "replay" button asset. In order to use it, create a new 
    * instance and convert it to bitmapData. **/ 
    [Embed (source= "Assets/HUD/bt_replay.png")] 
     public static const BtReplay:Class; 
    /** BitmapData of the image. **/ 
    public static var _btReplay:BitmapData= new BtReplay().bitmapData; 

    /** Class of the yellow "Winner" asset. In order to use it, create a new 
    * instance and convert it to bitmapData. **/ 
    [Embed(source="Assets/HUD/gagne_jaune.png")] 
     public static const GagneJaune:Class; 
    /** BitmapData of the image. **/ 
    public static var _gagneJaune:BitmapData= new GagneJaune().bitmapData; 

    /** Class of the red "Winner" asset. In order to use it, create a new 
    * instance and convert it to bitmapData. **/ 
    [Embed(source="Assets/HUD/gagne_rouge.png")] 
     public static const GagneRouge:Class; 
    /** BitmapData of the image. **/ 
    public static var _gagneRouge:BitmapData= new GagneRouge().bitmapData; 

    /** Class of the yellow "Looser" asset. In order to use it, create a new 
    * instance and convert it to bitmapData. **/ 
    [Embed(source="Assets/HUD/perdu_jaune.png")] 
     public static const PerduJaune:Class; 
    /** BitmapData of the image. **/ 
    public static var _perduJaune:BitmapData= new PerduJaune().bitmapData; 

    /** Class of the red "Looser" asset. In order to use it, create a new 
    * instance and convert it to bitmapData. **/ 
    [Embed(source="Assets/HUD/perdu_rouge.png")] 
     public static const PerduRouge:Class; 
    /** BitmapData of the image. **/ 
    public static var _perduRouge:BitmapData= new PerduRouge().bitmapData; 

    /** Class of the idle zwig 1 asset. In order to use it, create a new 
    * instance and convert it to bitmapData. 
    * This is a yellow idle down-pointed zwig. **/ 
    [Embed (source="Assets/Players/zwig1_idle.png")] 
     public static const Zwig1idle:Class; 
    /** BitmapData of the image. **/ 
    public static var _zwig1idle:BitmapData= new Zwig1idle().bitmapData; 
    /** Blitting array for the idle zwig 1. **/ 
    public static var _zwig1idleArray:Array= new Array[z1i000,z1i001,z1i002,z1i003,z1i004,z1i005,z1i006,z1i007,z1i008,z1i009, 
                z1i010,z1i011,z1i012,z1i013,z1i014,z1i015,z1i016,z1i017,z1i018,z1i019, 
                z1i020,z1i021,z1i022,z1i023,z1i024,z1i025,z1i026,z1i027]; 

    /** Class of the idle zwig 2 asset. In order to use it, create a new 
    * instance and convert it to bitmapData. 
    * This is a red idle up-pointed zwig. **/ 
    [Embed (source="Assets/Players/zwig2_idle.png")] 
     public static const Zwig2idle:Class; 
    /** BitmapData of the image. **/ 
    public static var _zwig2idle:BitmapData= new Zwig2idle().bitmapData; 
    /** Blitting array for the idle zwig 2. **/ 
    public static var _zwig2idleArray:Array= new Array[z2i000]; 

    public static var z1i006:Rectangle = new Rectangle(2,133,129,129); 
    public static var z1i021:Rectangle = new Rectangle(133,395,129,129); 
    public static var z1i014:Rectangle = new Rectangle(133,264,129,129); 
    public static var z1i025:Rectangle = new Rectangle(2,526,129,129); 
    public static var z1i016:Rectangle = new Rectangle(264,264,129,129); 
    public static var z1i005:Rectangle = new Rectangle(264,2,129,129); 
    public static var z1i023:Rectangle = new Rectangle(264,395,129,129); 
    public static var z1i024:Rectangle = new Rectangle(2,526,129,129); 
    public static var z1i020:Rectangle = new Rectangle(133,395,129,129); 
    public static var z1i011:Rectangle = new Rectangle(264,133,129,129); 
    public static var z1i015:Rectangle = new Rectangle(133,264,129,129); 
    public static var z1i013:Rectangle = new Rectangle(2,264,129,129); 
    public static var z1i001:Rectangle = new Rectangle(2,2,129,129); 
    public static var z1i010:Rectangle = new Rectangle(264,133,129,129); 
    public static var z1i027:Rectangle = new Rectangle(133,526,129,129); 
    public static var z1i007:Rectangle = new Rectangle(2,133,129,129); 
    public static var z1i018:Rectangle = new Rectangle(2,395,129,129); 
    public static var z1i019:Rectangle = new Rectangle(2,395,129,129); 
    public static var z1i004:Rectangle = new Rectangle(264,2,129,129); 
    public static var z1i017:Rectangle = new Rectangle(264,264,129,129); 
    public static var z1i008:Rectangle = new Rectangle(133,133,129,129); 
    public static var z1i022:Rectangle = new Rectangle(264,395,129,129); 
    public static var z1i000:Rectangle = new Rectangle(2,2,129,129); 
    public static var z1i026:Rectangle = new Rectangle(133,526,129,129); 
    public static var z1i012:Rectangle = new Rectangle(2,264,129,129); 
    public static var z1i003:Rectangle = new Rectangle(133,2,129,129); 
    public static var z1i009:Rectangle = new Rectangle(133,133,129,129); 
    public static var z1i002:Rectangle = new Rectangle(133,2,129,129); 

    public static var z2i000:Rectangle = new Rectangle(2,2,141,149); 
} 
} 

Die Background-Klasse, die den Vermögenswert auf Lager versucht, zu verwenden, in einer Eigenschaft ist, wie folgt aus:

package Game 
{ 
import flash.display.BitmapData; 
import flash.display.Sprite; 
import flash.geom.Rectangle; 
import flash.events.Event; 
import flash.geom.Point; 

import Game.R; 

public class Background extends Sprite 
{ 
    private var canvas:BitmapData; 
    private var point:Point= new Point(); 
    private var level:uint; 
    private var image:BitmapData; 

    /** Initialise the background by telling it on which canvas to render 
    * and the level needs to be shown. **/ 
    public function Background(canvas:BitmapData,level:uint=0) 
    { 
     this.canvas= canvas; 
     this.level= level; 
     this.addEventListener(Event.ENTER_FRAME,init); 
    } 

    private function init(e:Event):void 
    { 
     this.removeEventListener(Event.ENTER_FRAME,init); 

     switch (this.level) 
     { 
      case 0: 
       this.image= new R.L1Background().bitmapData; 
      break; 

      default: 
       this.image= new R.L1Background().bitmapData; 
      break; 
     } 
    } 

    /** Render the background in the canvas. **/ 
    public function render():void 
    { 
     this.canvas.copyPixels(this.image, this.canvas.rect, this.point); 
    } 
} 
} 

Und sicher ist sicher, hier ist das Spiel Klasse, die den Hintergrund instanziiert. Die verwendeten Methoden sind diejenigen, um die Spielobjekte (Hintergrund, Hud, Zwicks, Rackets, Twinkys und Score) zu initialisieren und zu erstellen, und die Rendering-Methode, um die Anzeige am Ende der Klasse zu aktualisieren.

package Game 
{ 
import Game.*; 
import Game.Worlds.Level1.Level1; 

import com.greensock.TweenMax; 
import com.greensock.easing.*; 

import flash.display.Bitmap; 
import flash.display.BitmapData; 
import flash.display.Sprite; 
import flash.display3D.IndexBuffer3D; 
import flash.events.Event; 
import flash.events.MouseEvent; 
import flash.text.TextField; 
import flash.ui.Multitouch; 
import flash.ui.MultitouchInputMode; 

public class Game extends Sprite 
{ 
    /** Hold each racquet so as to retrieve them when collision detection is needed. **/ 
    public var racquetList:Vector.<Racquet>= new Vector.<Racquet>(2,true); 
    /** Hold each Zwig so as to retrieve them when collision detection is needed. **/ 
    public var zwigList:Vector.<Zwig>= new Vector.<Zwig>(2,true); 

    /** Object that contains the coordinates for the Twinkys in the counter. **/ 
    public var twinkyScore0:Object= {firstX:727,firstY:950,secondX:710,secondY:911, 
     thirdX:690,thirdY:872,fourthX:674,fourthY:840, 
     fifthX:657,fifthY:808}; 
    public var twinkyScore1:Object= {firstX:41,firstY:74,secondX:58,secondY:113, 
     thirdX:78,thirdY:152,fourthX:94,fourthY:184, 
     fifthX:111,fifthY:216}; 

    /** Speed decay coefficient. The closer to 1 the less speed decays. **/ 
    private var friction:Number= .96; 

    /** Important positions for the placement of game elements. 
    * LianaHeight is the height at which the liana on the players' HUDs is ending their zone and on which the racquet travels. 
    * TwinkyHeight is the height at which the players stop controlling their Twinkys. 
    * YMargin is the vertical margin for the Twinkys. Used to place them at the end of the tube when added. 
    * XMargin is the horizontal margin for the Twinkys. Used to place them at the end of the tube when added. **/ 
    private var positions:Object= {LianaHeight:165,TwinkyHeight:265,YMargin:8.0,XMargin:200.0}; 

    private var _mRef:ZwigsIpad; 
    private var i:uint; 
    Multitouch.inputMode= MultitouchInputMode.TOUCH_POINT; 

    /** Textfield used for debugging. **/ 
    public var aText:TextField; 

    private var _Canvas:BitmapData= new BitmapData(ZwigsIpad.BORDERS.right,ZwigsIpad.BORDERS.bottom); 
    private var _Background:Background; 
    private var _HUD1:HUD; 
    private var _HUD2:HUD; 
    private var _Zwig1:Zwig; 
    private var _Zwig2:Zwig; 
    private var _Racquet1:Racquet; 
    private var _Racquet2:Racquet; 
    private var _Twinky1:Twinky; 
    private var _Twinky2:Twinky; 
    private var _Score:Score; 

    /** Create the first level. It will create the stage and add the background, HUDs, Zwigs, Racquets and Twinkys, and manages the game until the end. **/ 
    public function Game(m:ZwigsIpad) 
    { 
     this._mRef= m; 
     this.addEventListener(Event.ADDED_TO_STAGE,init,false,0,true); 
    } 

    private function init(e:Event):void 
    { 
     this.removeEventListener(Event.ADDED_TO_STAGE,init); 

     // Text output for debugging the game 
     aText= new TextField(); 
     this.addChild(aText); 
     this.aText.textColor= 0xFF0000; 
     this.aText.width= 384; 
     this.aText.height= 1024; 

     this.aText.appendText("\n added textfield"); 

     // Get informations from Level1 
     // LATER make it dependant from what level was chosen (switch case) 
     this.positions.LianaHeight= Level1.LIANAHEIGHT; 
     this.positions.TwinkyHeight= Level1.TWINKYHEIGHT; 
     this.positions.YMargin= Level1.YMARGIN; 
     this.positions.XMargin= Level1.XMARGIN; 
     this.friction= Level1.FRICTION; 

     this.aText.appendText("\n got level1 infos"); 

     // Add background 
     this._Background= new Background(this._Canvas,0); 

     this.aText.appendText("\n added background"); 

     // Add HUD 
     this._HUD1= new HUD(this._Canvas); 
     this._HUD2= new HUD(this._Canvas,true,1); 

     this.aText.appendText("\n added hud"); 

     // Add zwigs 
     this._Zwig1= new Zwig(this.positions,this._Canvas); 
     this._Zwig2= new Zwig(this.positions,this._Canvas,true,1); 

     this.aText.appendText("\n added zwigs"); 

     // Add racquets 
     this._Racquet1= new Racquet(this,this.positions,this._Canvas); 
     this._Racquet2= new Racquet(this,this.positions,this._Canvas,false,1); 

     this.aText..appendText("\n added racquets"); 

     // Add twinkys 
     this._Twinky1= new Twinky(this._Score,this,this.positions,this.friction,this._Canvas,0); 
     this._Twinky2= new Twinky(this._Score,this,this.positions,this.friction,this._Canvas,1,false,1); 

     this.aText.appendText("\n added twinkys"); 

     // Add scoring 
     this._Score= new Score(this,this._mRef); 
     this.addChild(this._Score); 

     this.aText.appendText("\n added score"); 

     this.addEventListener(Event.ENTER_FRAME,renderLevel); 
    } 

    private function renderLevel(e:Event):void 
    { 
     this._Canvas.lock(); 

     this._Background.render(); 
     this._HUD1.render(); 
     this._HUD2.render(); 
     this._Score.render(); 
     this._Zwig1.render(); 
     this._Zwig2.render(); 
     this._Racquet1.render(); 
     this._Racquet2.render(); 
     this._Twinky1.render(); 
     this._Twinky2.render(); 

     this._Canvas.unlock(); 
    } 
} 
} 

Answer 1

Der Fehler ist, während die statische Initialisierer für _l1Background (oder möglicherweise für einen anderen ein, wenn es andere gibt) ausgeführt wird.

Es könnte sein, dass die Reihenfolge, in der die beiden statischen Variablen initialisiert werden, unbestimmt ist. normalerweise wird [Embed] auf einem const anstelle eines var verwendet, also können Sie das versuchen.

Sie könnten auch versuchen, den an den Punkt zu verschieben, an dem Sie den Hintergrund tatsächlich verwenden müssen, anstatt statisch. Das wird auch etwas Speicher sparen, wenn Sie viele Hintergründe haben.

Answer 2

Edit: Ich lese Ihre Klasse zu schnell, das ist wahrscheinlich nicht die richtige Antwort.

So ist der Fehler # 1009 geschieht diese Zeile:

this.image= new R.L1Background().bitmapData; 

Aber in einer anderen Klasse Ihre Variable bereits von BitmapData ist, so ist es Eigentum nicht über .bitmapData - damit Sie „diese Eigenschaft nicht zugreifen können“.

public static var _l1Background:BitmapData= new L1Background().bitmapData; 

Man könnte sagen, nur this.image= new R.L1Background();