问题描述：
英语翻译
ExtJS 4 has update method also.Update() method executes after the configuration property has been set in the class.Update method has two parameters,new value for the field and its previous value (old value).If you have apply and update methods for particular property then first apply will get called and then update method will get called.
最后一句话
If you have apply and update methods for particular property then first apply will get called and then update method will get called.
如果有apply和update方法必须要先调用apply方法一下然后才能调用updata方法吗?
此乃原文
ExtJS 4 has update method also.Update() method executes after the configuration property has been set in the class.Update method has two parameters,new value for the field and its previous value (old value).If you have apply and update methods for particular property then first apply will get called and then update method will get called.
最后一句话
If you have apply and update methods for particular property then first apply will get called and then update method will get called.
如果有apply和update方法必须要先调用apply方法一下然后才能调用updata方法吗?
此乃原文
问题解答：
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