customEventData 传0 怎么变成 undefined了？

@enter334714 写道：

var clickEventHandler = new cc.Component.EventHandler();
clickEventHandler.target = this.clickHandlerNode;
clickEventHandler.component = "LoginSevenDay";
clickEventHandler.handler = "onLeftListBtnEvent";
clickEventHandler.customEventData = this.index; //bug 0会变成undefined 处理下
this.button.getComponent(cc.Button).clickEvents[0]=(clickEventHandler); 实测

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