it can be used like this:
function setScore(newScore){
this.scoreLabel.runAction(
cc.ActionWeNeed.create(0.3, //time
this.score, //startValue
newScore, // targetValue
cc.ActionCallFuncWeNeed.create(function(value){ //call back with a float param(or double?)
// this call back run in update of the action.
this.score = Math.round(value);
this.scoreLabel.setString(value + "");
},this)// with owner this
);
}
it can also be used to change size of scale9sprite by runaction and any other scene~
as\ you\ see,\ we\ can\ do\ much\ more\ thing\ in\ runAction~
will cocos2dx team add such a new actionInterval?