import Tool2D_Button from "./Tool2D/Tool2D_Button"; /** * 2D工具类 */ export default class Tool2D { /**按钮动画工具类 */ private button: Tool2D_Button; /**按钮动画工具 */ public get Button (): Tool2D_Button { if (this.button == null) { this.button = new Tool2D_Button(); } return this.button; } }