iphone - Open already created window from within another window -

in app.js file i've created window called login_window.

i have window called win1 has basic app functions. in there, have logout button. when clicked, i'd have open login_window. can't seem work.

use this:

login_window *vc = [[login_window alloc] init];

[self.navigationcontroller poptorootviewcontrolleranimated:no];

[vc logoutpressed:(id) sender];