Method onDestroy

packages/sprite/src/SpriteComponent.ts:478–487

* 组件销毁时调用 * Called when component is destroyed

()

     * Called when component is destroyed
     */
    onDestroy(): void {
        // 释放资产引用 / Release asset reference
        if (this._assetReference) {
            this._assetReference.release();
            this._assetReference = undefined;
        }
        // 清理材质覆盖 / Clear material overrides
        this.materialOverrides = {};
        this._instanceMaterial = null;
    }
}