Load .xib with IBAction

[teslakiiing]

I recently made an RSS reader app and now I need help with how to load another .xib(everything I have so far is in Mainwindow.xib) where i will insert a webview.

[baja_yu]

Create a new view controller through Xcode, it gives the option to create a nib file for it.

[teslakiiing]

Originally Posted by baja_yu

Create a new view controller through Xcode, it gives the option to create a nib file for it.

My previous tries involved creating the nib and then the classes and I didn't get that working but as soon as I tried this it worked. But I have a TabBar app so how can I make this load in fullscreen? because now the TabBar stays.
I used

[[NSBundle mainBundle] loadNibNamed: @"MyXib" owner: self options: nil]

and this can load the other xib but I have a TabBar app so how can I make this load in fullscreen? Because now the TabBar stays.
And how can I go back to MainWindow. Just changing MyXib to Mainwindows results in

unrecognized selector sent to instance

in debug