Actionscript 3 为什么可以';我不能从其他类访问公共变量吗?
我想在我的游戏文档类中定义我的变量,然后在我的移动类中使用其中的一些变量。然而,当我在我的movement类中使用这些变量时,我会收到大量的编译错误,它们都是未定义的 因此我的问题是,为什么我的公共变量没有传递给我的另一个类?我通过做Actionscript 3 为什么可以';我不能从其他类访问公共变量吗?,actionscript-3,flash,actionscript,air,Actionscript 3,Flash,Actionscript,Air,我想在我的游戏文档类中定义我的变量,然后在我的移动类中使用其中的一些变量。然而,当我在我的movement类中使用这些变量时,我会收到大量的编译错误,它们都是未定义的 因此我的问题是,为什么我的公共变量没有传递给我的另一个类?我通过做导入游戏导入了这个类
导入游戏导入了这个类所以这让我很困惑。我可能只是做错了,但是非常感谢你的帮助
时间线
addChild((new Movement));
游戏文档类
package
{
import flash.display.MovieClip;
import flash.utils.Timer;
import flash.events.TimerEvent;
public class game extends MovieClip
{
public var area1:Boolean = true;
public var area2:Boolean = false;
public var area3:Boolean = false;
public var player1:Boolean = true;
public var playerPosKeeper_mc:MovieClip = new mc_PlayerPosKeeper();
public var up_dpad:MovieClip = new dpad_Up();
public var down_dpad:MovieClip = new dpad_Down();
public var left_dpad:MovieClip = new dpad_Left();
public var right_dpad:MovieClip = new dpad_Right();
public var menu_dpad:MovieClip = new dpad_Menu();
public var run_dpad:MovieClip = new dpad_Menu();
public var barrierRoof1_game:MovieClip = new game_BarrierRoof();
public var barrierRoof2_game:MovieClip = new game_BarrierRoof();
public var barrierSide1_game:MovieClip = new game_BarrierSide();
public var barrierSide2_game:MovieClip = new game_BarrierSide();
public function game()
{
trace("SUCCESS | Constructed Game Class");
}
}
}
package
{
import game;
import flash.display.Stage;
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.TouchEvent;
import flash.net.dns.AAAARecord;
import flash.ui.Multitouch;
import flash.ui.MultitouchInputMode;
public class Movement extends MovieClip
{
var inMotion:Boolean = false;
public function Movement()
{
trace("SUCCESS | Constructed Movement Class");
addChild(playerPosKeeper_mc);
playerPosKeeper_mc.x = 384;
playerPosKeeper_mc.y = 46;
addChild(up_dpad);
up_dpad.x = 55;
up_dpad.y = 336;
addChild(down_dpad);
down_dpad.x = 57;
down_dpad.y = 432;
addChild(left_dpad);
left_dpad.x = 19;
left_dpad.y = 372;
addChild(right_dpad);
right_dpad.x = 118;
right_dpad.y = 372;
addChild(menu_dpad);
menu_dpad.x = 61;
menu_dpad.y = 377;
addChild(run_dpad);
run_dpad.x = 684;
run_dpad.y = 369;
addChild(barrierRoof1_game);
barrierRoof1_game.x = 0;
barrierRoof1_game.y = 0;
addChild(barrierRoof2_game);
barrierRoof2_game.x = 0;
barrierRoof2_game.y = 470;
addChild(barrierSide1_game);
barrierSide1_game.x = 0;
barrierSide1_game.y = 0;
addChild(barrierSide2_game);
barrierSide2_game.x = 790;
barrierSide2_game.y = 0;
Multitouch.inputMode = MultitouchInputMode.TOUCH_POINT;
up_dpad.addEventListener(TouchEvent.TOUCH_BEGIN, moveUpTouchBEGIN);
up_dpad.addEventListener(TouchEvent.TOUCH_END, moveUpTouchEND);
}
public function moveUpTouchBEGIN(e:TouchEvent):void
{
trace("Touch Began")
}
public function moveUpTouchEND(e:TouchEvent):void
{
trace("Touch Ended")
}
}
}
动作类
package
{
import flash.display.MovieClip;
import flash.utils.Timer;
import flash.events.TimerEvent;
public class game extends MovieClip
{
public var area1:Boolean = true;
public var area2:Boolean = false;
public var area3:Boolean = false;
public var player1:Boolean = true;
public var playerPosKeeper_mc:MovieClip = new mc_PlayerPosKeeper();
public var up_dpad:MovieClip = new dpad_Up();
public var down_dpad:MovieClip = new dpad_Down();
public var left_dpad:MovieClip = new dpad_Left();
public var right_dpad:MovieClip = new dpad_Right();
public var menu_dpad:MovieClip = new dpad_Menu();
public var run_dpad:MovieClip = new dpad_Menu();
public var barrierRoof1_game:MovieClip = new game_BarrierRoof();
public var barrierRoof2_game:MovieClip = new game_BarrierRoof();
public var barrierSide1_game:MovieClip = new game_BarrierSide();
public var barrierSide2_game:MovieClip = new game_BarrierSide();
public function game()
{
trace("SUCCESS | Constructed Game Class");
}
}
}
package
{
import game;
import flash.display.Stage;
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.TouchEvent;
import flash.net.dns.AAAARecord;
import flash.ui.Multitouch;
import flash.ui.MultitouchInputMode;
public class Movement extends MovieClip
{
var inMotion:Boolean = false;
public function Movement()
{
trace("SUCCESS | Constructed Movement Class");
addChild(playerPosKeeper_mc);
playerPosKeeper_mc.x = 384;
playerPosKeeper_mc.y = 46;
addChild(up_dpad);
up_dpad.x = 55;
up_dpad.y = 336;
addChild(down_dpad);
down_dpad.x = 57;
down_dpad.y = 432;
addChild(left_dpad);
left_dpad.x = 19;
left_dpad.y = 372;
addChild(right_dpad);
right_dpad.x = 118;
right_dpad.y = 372;
addChild(menu_dpad);
menu_dpad.x = 61;
menu_dpad.y = 377;
addChild(run_dpad);
run_dpad.x = 684;
run_dpad.y = 369;
addChild(barrierRoof1_game);
barrierRoof1_game.x = 0;
barrierRoof1_game.y = 0;
addChild(barrierRoof2_game);
barrierRoof2_game.x = 0;
barrierRoof2_game.y = 470;
addChild(barrierSide1_game);
barrierSide1_game.x = 0;
barrierSide1_game.y = 0;
addChild(barrierSide2_game);
barrierSide2_game.x = 790;
barrierSide2_game.y = 0;
Multitouch.inputMode = MultitouchInputMode.TOUCH_POINT;
up_dpad.addEventListener(TouchEvent.TOUCH_BEGIN, moveUpTouchBEGIN);
up_dpad.addEventListener(TouchEvent.TOUCH_END, moveUpTouchEND);
}
public function moveUpTouchBEGIN(e:TouchEvent):void
{
trace("Touch Began")
}
public function moveUpTouchEND(e:TouchEvent):void
{
trace("Touch Ended")
}
}
}
您感到困惑,因为“公共”并不意味着“全球”。将变量声明为public意味着您希望向任何实体授予对该变量的访问权,前提是该实体知道该变量的位置
让我们看看你有什么
- 顶部显示对象:舞台
- 主要时间线:游戏是一个孩子的阶段
- MovieClips up_dpad、down_dpad等等,都是游戏实例的字段
- 运动:实例是游戏的子对象
在移动中,您试图访问up_dpad和其他,但它们作为游戏实例的字段保留,与移动实例无关。这就是为什么它们不在运动的寻址上下文中
因此,如果您想将这些变量声明为游戏字段,您需要以正确的方式从运动中解决它们
忘记时间线吧。在游戏中(看在上帝的份上,永远不要用小写字母调用类,除非在枪口下),我相信这是一个根文档类:
public function Game()
{
trace("SUCCESS | Constructed Game Class");
// Pass reference to this instance to the constructor.
var aMove:Movement = new Movement(this);
// Add it as a child.
addChild(aMove);
}
运动中:
public function Movement(main:Game)
{
trace("SUCCESS | Constructed Movement Class");
// Access variables inside Game instance via given reference.
addChild(main.playerPosKeeper_mc);
main.playerPosKeeper_mc.x = 384;
main.playerPosKeeper_mc.y = 46;
// ...and so on
}
这些是面向对象编程的基础。如果要访问对象内部的任何内容,需要先访问对象。感谢您的逐步解释。非常感谢。@user2712413它让我想起了2001年,当时我的时间线A上的代码无法看到时间线B上声明的变量的原因基本相同,那就是Flash 5和奇怪的ActionScript,甚至还不是AS1。在我最终获得MovieClip层次结构和直接寻址之后,它变得相当容易。