symfony - Why use FormFactory in an event subscriber event? -


Why do people use the form factor in an Event Subscriber event?

I currently have an Event Subscriber ... Public Stabilized Jobs Received Subscribed Avents () {Return Form (FormEvent :: PRE_SET_DATA = Gt; 'doSomething',); } Public Function doSomething (FormEvent $ Event) {$ form = $ event- & gt; GetForm (); ... /// Other stuff, see below /// ...}

Currently I'm using it .. 

  $ Form- & gt; Add ('Field', 'Type', Options);   
 But many other developers use a form factory.  
  $ form-> Add ($ formFactory- & gt; createNamed ('field', 'type', blank, option);   
 If both work, then what is the reason for using additional form factory object   
 
 
 you  -> add (name, type ...)  can be used only since then. Therefore, code written for older versions should use the  $ formFactory      to create examples of FormInterface

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