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/**
 * 单例 cc.Component
 */
export class CcSingleton<T> extends cc.Component {
    private static _ins = null;

    public static Ins<T>(c: { new (): T }): T {
        if (this._ins == null) {
            this._ins = cc.director.getScene().getComponentInChildren(c.name);
            if (!this._ins) {
                const _n = new cc.Node('Singleton of ' + c.name);
                _n.parent = cc.director.getScene();
                _n.addComponent(this);
                this._ins = _n.getComponent(c.name);
            }
        }
        return this._ins;
    }

    public init() {
        console.dir(this);
    }
}

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* 单例组件类: export class ccPool extends CcSingleton<ccPool> {}

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ccPool.Ins(ccPool).'xxx'