// !单例模式
export default class CommonUtility {
  private static instance: CommonUtility;
  private constructor() {}
  
  static getInstance() {
    if (!this.instance) {
      this.instance = new CommonUtility();
    }
    return this.instance;
  }

  bindNodeHandler(curComp: any, bNode: cc.Node, callback: string, isButton: boolean = true, customData: string = null, isRebind: boolean = false) {
    if (!curComp || !bNode) {
        return null;
    }
    let nodeComp = bNode.getComponent(isButton ? cc.Button : cc.Toggle);
    if (!nodeComp) {
        nodeComp = bNode.addComponent(isButton ? cc.Button : cc.Toggle);
    }
    var pHandler = new cc.Component.EventHandler();
    pHandler.target = curComp.node;
    pHandler.component = cc.js.getClassName(curComp);
    pHandler.handler = callback;
    if (customData != null) {
        pHandler.customEventData = customData;
    }
    if (isRebind) {
        nodeComp.clickEvents = [];
    }
    nodeComp.clickEvents.push(pHandler);
    return nodeComp;
  }
}