pinball/assets/_Game/Scripts/Gameplay/Outer.ts

import { _decorator, Collider2D, Component, Contact2DType, Node } from 'cc';
import { GameManager } from '../Manager/GameManager';
import ObjectPool from '../Pool/ObjectPool';
const { ccclass, property } = _decorator;

@ccclass('Outer')
export class Outer extends Component {
    @property({ type: Collider2D, visible: true })
    private _collider: Collider2D;

    protected start(): void {
        this._collider.on(Contact2DType.BEGIN_CONTACT, this.onBeginContact, this);
    }

    private onBeginContact(selfCollider: Collider2D, otherCollider: Collider2D) {
        ObjectPool.release(otherCollider.node);
        GameManager.instance.ballOut();
    }
}