completeDeferred=jQuery.Callbacks("once?memory");
deferred.promise(jqXHR).complete?=?completeDeferred.add;

var?fucTemp=function(f){};

deferred.promise(jqXHR).complete(fucTemp)=>
completeDeferred.add(fucTemp);

所以，調(diào)用ajax的complete 添加回調(diào)方法時(shí)，實(shí)際上是在向completeDeferred的這個(gè)Callbacks中添加回調(diào)。

在最后，ajax得到請(qǐng)求內(nèi)容后，會(huì)調(diào)用completeDeferred中的回調(diào)隊(duì)列

completeDeferred.fireWith(?callbackContext,?[?jqXHR,?statusText?]?);
//callbackContext：為回調(diào)環(huán)境????=>?callbackContext?=?s.context?||?s
//[?jqXHR,?statusText?]：回調(diào)方法的參數(shù)