我是一名设计师，在代码世界中尝试我的双手。到目前为止，我已经能够弄清楚事情，但我终于碰壁了。我在这里使用 Flash 工作，所以我无法逃脱它可能不是代码，而是设置的可能性。另外，作为新手，答案可能一直摆在我面前，而我只是陷入了困境。
无论如何，我正在开发一个简单的游戏，当角色在其下方时墙壁会消失，然后在他离开后重新出现。我为此寻求帮助，并且能够以单独的类文件的形式获得一些代码。这太棒了，而且很糟糕
- 太棒了，因为我有可以工作的代码，但是...... - 作为编码新手，我从来没有使用过类，现在我已经将它应用到我自己的项目中，它不起作用。故障排除现在变得更加困难。
在努力寻找答案之后，我想它终于到了我必须寻求帮助的地步。
一切都编译得很好，但我立即收到以下输出错误：
"Attempting to launch and connect to Player using URL ""\flashDemoCS5.5-47.swf
[SWF] ""\flashDemoCS5.5-47.swf - 8512188 bytes after decompression
ArgumentError: Error #2015: Invalid BitmapData.
at flash.display::BitmapData/ctor()
at flash.display::BitmapData()
at Wall()[""\Wall.as:15]
at wall_003()
at flash.display::Sprite/constructChildren()
at flash.display::Sprite()
at flash.display::MovieClip()
at Wall()[""\Wall.as:13]
at wall()
at flash.display::Sprite/constructChildren()
at flash.display::Sprite()
at flash.display::MovieClip()
at flash.display::Sprite/constructChildren()
at flash.display::Sprite()
at flash.display::MovieClip()
at flash.display::Sprite/constructChildren()
at flash.display::Sprite()
at flash.display::MovieClip()
at flashDemoCS5_fla::MainTimeline()
Cannot display source code at this location.
"
给我的代码在一个演示中工作，它本身只是附加的。演示功能的 .fla 中没有任何编码。我先发一下。它是 Wall.as，它与主 .fla 文件位于同一文件夹中：
package {
import flash.display.MovieClip;
import flash.display.BitmapData;
import flash.events.Event;
import flash.geom.Point;
public class Wall extends MovieClip {
var bmp:BitmapData;
public function Wall() {
this.addEventListener(Event.ENTER_FRAME, hideWall, false, 0, false);
bmp = new BitmapData (this.width, this.height, true, 0);
bmp.draw(this);
}
public function hideWall(e:Event){
if(bmp.hitTest(new Point(0, 0), 0, this.globalToLocal(new Point(stage.mouseX, stage.mouseY)))) {
this.visible = false;
}else{
this.visible = true;
}
}
}
}
附加到主 .fla 文件的代码位于第一帧的自己的层中：
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUpHandler);
stage.addEventListener(Event.ENTER_FRAME, loop);
stage.scaleMode = StageScaleMode.NO_SCALE; // or other scale modes...
stage.align = StageAlign.TOP_LEFT;
stage.addEventListener(Event.RESIZE, resizeHandler);
function resizeHandler(e:Event):void{
trace(stage.stageWidth + "x" + stage.stageHeight);
}
;
var animationState:String = "idle";
var mirrorState:String = "walk";
var keyCollected:Boolean = false;
var doorOpen:Boolean = false;
//collisions
var leftBumping:Boolean = false;
var rightBumping:Boolean = false;
var upBumping:Boolean = false;
var downBumping:Boolean = false;
//player collision points (relative to anchor point)
var leftBumpPoint:Point = new Point(-50,100);
var rightBumpPoint:Point = new Point(50,100);
var upBumpPoint:Point = new Point(0,75);
var downBumpPoint:Point = new Point(0,150);
//button press
var leftPressed:Boolean = false;
var rightPressed:Boolean = false;
var upPressed:Boolean = false;
var downPressed:Boolean = false;
//scrollspeed
var xSpeed:int = 0;
var ySpeed:int = 0;
var speedConstant:int = 5;
var friction:Number = 0.80;
//identify player location
var scrollX:int = 0;
var scrollY:int = 0;
//identify current level
var currentLevel:int = 1;
//next level function
function nextLevel():void{
currentLevel++;
//trace("Next Level: " + currentLevel);
if(currentLevel == 2){
gotoLevel2();
}
if(currentLevel == 3){
gotoLevel1();
}
}
//level 3 is the same as level 1. 3 will go back to 1 in the code so level 2 can be accessed agin.
function gotoLevel1():void{
back.other.gotoAndStop(1);
back.visuals.gotoAndStop(1);
back.collisions.gotoAndStop(1);
scrollX = 0;
scrollY = 0;
keyCollected = false;
back.other.doorKey.visible = true;
doorOpen = false;
back.other.lockedDoor.gotoAndStop(1);
currentLevel = 1;
}
function gotoLevel2():void{
back.other.gotoAndStop(2); //updates door and key
back.visuals.gotoAndStop(2); //updates the visuals
back.collisions.gotoAndStop(2); //updates the collisions
scrollX = 0; //resets the player's x position in the new level
scrollY = 500; //resets the player's y position in the new level
keyCollected = false; //resets the keyCollected variable
back.other.doorKey.visible = true; //makes the key visible again
doorOpen = false; //resets the doorOpen variable
back.other.lockedDoor.gotoAndStop(1); //makes the door return to its locked image
}
function loop(e:Event):void
{
if (back.collisions.hitTestPoint(player.x + leftBumpPoint.x,player.y + leftBumpPoint.y,true))
{
//trace("leftBumping");
leftBumping = true;
}
else
{
leftBumping = false;
}
if (back.collisions.hitTestPoint(player.x + rightBumpPoint.x,player.y + rightBumpPoint.y,true))
{
//trace("rightBumping");
rightBumping = true;
}
else
{
rightBumping = false;
}
if (back.collisions.hitTestPoint(player.x + upBumpPoint.x,player.y + upBumpPoint.y,true))
{
//trace("upBumping");
upBumping = true;
}
else
{
upBumping = false;
}
if (back.collisions.hitTestPoint(player.x + downBumpPoint.x,player.y + downBumpPoint.y,true))
{
//trace("downBumping");
downBumping = true;
}
else
{
downBumping = false;
}
if (leftPressed)
{
xSpeed -= speedConstant;
}
else if (rightPressed)
{
xSpeed += speedConstant;
}
if (upPressed)
{
ySpeed -= speedConstant;
}
else if (downPressed)
{
ySpeed += speedConstant;
}
//colision react
if (leftBumping)
{
if (xSpeed < 0)
{
xSpeed *= -0.5;
}
}
if (rightBumping)
{
if (xSpeed > 0)
{
xSpeed *= -0.5;
}
}
if (upBumping)
{
if (ySpeed < 0)
{
ySpeed *= -0.5;
}
}
if (downBumping)
{
if (ySpeed > 0)
{
ySpeed *= -0.5;
}
}
if (ySpeed && xSpeed || xSpeed || ySpeed> 10){
(ySpeed + xSpeed)/2;
trace(ySpeed + xSpeed);
trace(ySpeed);
trace(xSpeed);
}
else if(ySpeed && xSpeed || xSpeed || ySpeed < -10){
(ySpeed + xSpeed)/2;
trace(ySpeed + xSpeed);
trace(ySpeed);
trace(xSpeed);
}
//smoothes scrolling
xSpeed *= friction;
ySpeed *= friction;
scrollX -= xSpeed;
scrollY -= ySpeed;
back.x = scrollX;
back.y = scrollY;
//key controls
if(keyCollected == false){ // if we still haven't collected the key
if(player.hitTestObject(back.other.doorKey)){ // and if the player collides with the key
back.other.doorKey.visible = false; // hide the key from view
keyCollected = true; // set our Boolean to true
}
}
if(doorOpen == false){ // if the door hasn't been opened yet
if(keyCollected == true){ // and if the player has already collected the key
if(player.hitTestObject(back.other.lockedDoor)){ // check if the door and the player are touching
// if all of these conditions are met...
back.other.lockedDoor.gotoAndStop(2); // ...switch the door's image to its 2nd frame
doorOpen = true; // ...set the variable to true//level change. Move this later.
if(doorOpen && player.hitTestObject(back.other.lockedDoor)){
//proceed to the next level if the player is touching an open door
nextLevel();
}
}
}
if(doorOpen || player.hitTestObject(back.other.openDoor)){
nextLevel();
}
}
//animation
if (leftPressed || rightPressed || downPressed || xSpeed > speedConstant || xSpeed < ( speedConstant *-1 ) ){
animationState = "walk";
}else if(upPressed || upPressed && rightPressed || upPressed && leftPressed){
animationState = "walk_up";
}else{
player.prevFrame();
}
//makse player face direction he/she is going;
if (leftPressed && !rightPressed)
{
player.scaleX = -.7;
}
else if (rightPressed && !leftPressed)
{
player.scaleX = .7;
}
//stop animation
if (player.currentLabel != animationState)
{
player.gotoAndStop(animationState);
}
}
function keyDownHandler(e:KeyboardEvent):void
{
if (e.keyCode == Keyboard.LEFT)
{
leftPressed = true;
}
else if (e.keyCode == Keyboard.RIGHT)
{
rightPressed = true;
}
else if (e.keyCode == Keyboard.UP)
{
upPressed = true;
}
else if (e.keyCode == Keyboard.DOWN)
{
downPressed = true;
}
}
function keyUpHandler(e:KeyboardEvent):void
{
if (e.keyCode == Keyboard.LEFT)
{
leftPressed = false;
}
else if (e.keyCode == Keyboard.RIGHT)
{
rightPressed = false;
}
else if (e.keyCode == Keyboard.UP)
{
upPressed = false;
}
else if (e.keyCode == Keyboard.DOWN)
{
downPressed = false;
}
}
希望我已经提供了所需的一切。