ios - Difference between instantiateViewControllerWithIdentifier and initWithNibName? -


what difference between instantiateviewcontrollerwithidentifier , initwithnibname, other former storyboard , later not?

uistoryboard *signupstory = [uistoryboard storyboardwithname:@"signupstory" bundle:[nsbundle mainbundle]];     signuploginviewcontroller *signupvc = [signupstory instantiateviewcontrollerwithidentifier:@"signupvc"];

and 

signuploginviewcontroller *signupvc = [[signuploginviewcontroller alloc] initwithnibname:@"signuploginviewcontroller" bundle:[nsbundle mainbundle]];

if you've created ui using storyboards, you'll want call instantiateviewcontrollerwithidentifier. here, identifier not part of view controller used storyboard locate view controller. storyboard handle initialization , call initwithcoder, why need override when creating subclassed view controllers.

on other hand, if ui resides in pure .xib file - developers use initwithnibname. does, technically, break encapsulation , there other ways it, you'll see used it's designated initializer class.


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