iphone - Changing rootviewcontroller for navigation controller dynamically -


i'm trying change rootviewcontroller navigationcontroller in didfinishlaunchingwithoptions.
don't know how can that.

i have gone through link well:
http://starterstep.wordpress.com/2009/03/05/changing-a-uinavigationcontroller%e2%80%99s-root-view-controller/

here code in didfinishlaunchingwithoptions:

- (bool)application:(uiapplication *)application didfinishlaunchingwithoptions:(nsdictionary *)launchoptions {     self.window = [[uiwindow alloc] initwithframe:[[uiscreen mainscreen] bounds]];      uiviewcontroller *rootcontroller=[[homepagecontroller alloc] initwithnibname:@"homepagecontroller" bundle:nil];     navigationcontroller=[[uinavigationcontroller alloc] initwithrootviewcontroller:rootcontroller];  //    presentation=[[presentationcontroller alloc]initwithnibname:@"presentationcontroller" bundle:nil]; //     //    navigationcontroller=[[uinavigationcontroller alloc]initwithrootviewcontroller:presentation]; //     //    presentationlist=[[presentationlistcontroller alloc]initwithnibname:@"presentationlistcontroller" bundle:nil]; //     //    uinavigationcontroller *listnavigation = [[uinavigationcontroller alloc] initwithrootviewcontroller:presentationlist]; //     //    revealer=[[zuuirevealcontroller alloc]initwithfrontviewcontroller:navigationcontroller rearviewcontroller:listnavigation];      [self.window addsubview:navigationcontroller.view];      [self.window makekeyandvisible];     return yes; }

right comment , run application change rootviewcontroller. not practical approach.

any appreciated.

instead of this:

[self.window addsubview:navigationcontroller.view];

put this:

self.window.rootviewcontroller = navigationcontroller;

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