MovieClip的Adobe Animate ActionScript 3错误1009

Question

我正在编写代码，让敌人检测与玩家的冲突。在我的Enemy类中，我有:导入flash.display.MovieClip；导入flash.events.Event；

public class Enemy extends MovieClip {
    var Player: MovieClip;
    public function Enemy() {
        this.addEventListener(Event.ENTER_FRAME, EnemyUpdate);

    }
    function setPlayer(_Player: MovieClip) {
        Player = _Player;
    }
    function EnemyUpdate(_event: Event) {
        var enemyHit: Boolean = this.hitTestObject(Player.Character.Legs);
        if (enemyHit) {
            trace("OUCH!!");
        }
    }

}

在我的主类中，我尝试使用以下代码将播放器MovieClip发送到Enemy Class脚本：

    public function Main() {
        enemy.setPlayer(player);
    }

MovieClip敌人有敌人脚本附加在它上面。当我运行程序时，播放器变量为空。如何让播放器识别播放器MovieClip？

Answer 1

这是因为你在Enemy被实例化之后设置了你的播放器。在Enemy构造函数中，你有EnterFrame listener。要修复该错误，请按如下所示更改代码：

public function Enemy() {
    // empty constructor, you can remove it if there is no other logic in it

}
function setPlayer(_Player: MovieClip) {
    Player = _Player;
    // the Player variable is not null anymore. 
    this.addEventListener(Event.ENTER_FRAME, EnemyUpdate);
}