改源码方案可以这样:
laya.ui.js改成这样即可,去掉判断if (this._selectedIndex !=value)
__getset(0,__proto,'selectedIndex',function(){
return this._selectedIndex;
},function(value){
//if (this._selectedIndex !=value){
this._selectedIndex=value;
this.changeSelectStatus();
this.event(/*laya.events.Event.CHANGE*/"change");
this.selectHandler && this.selectHandler.runWith(value);
this.startIndex=this._startIndex;
//}
});