iphone - Viewcontroller's view fram doesn't give accuratly -

i using 2 approaches place viewcontroller

approach 1: taking uiviewcontroller , pushing viewcontroller below [self.navigationcontroller pushviewcontroller:myviewcontroller animated:yes];

approach 2:taking uiviewcontroller using

[self presentmodalviewcontroller:myviewcontroller animated:yes]; 

while using approach1 "myviewcontroller" view size giving expected portrait 768*1024 coming landscape 1024*768.but approach2 not providing expected sizes first approach, both orientations giving me 768*1024

problem: issue in second approach? there solution on come issue.

in project have use second approach only. need correct dimensions.provide me suggestions.

my viewcotrollers hierarchy:

1)my project based on uitabbarviewcontroller , restricted portrait only.

2)one of uitabbarbutton loads viewcontroller ( bookbagviewcontroller *bookbagviewcontroller = [[bookbagviewcontroller alloc] init]; thenavigationcontroller = [[uinavigationcontroller alloc] initwithrootviewcontroller:bookbagviewcontroller];)

3)bookbagviewcontroller restricted portrait.

4)bookbagviewcontroller contains 1 button once click on below code executed

myviecontroller *viewer = [[myviecontroller alloc] initwithnibname:@"myviecontroller" bundle:nil]; [self presentmodalviewcontroller:viewer animated:yes]; 

5)myviecontroller supporting orientations expected not giving accurate frame size while printing (debugging).

6)for returning using below line

[self dismissmodalviewcontrolleranimated:yes]; 

for more info provided above steps. please accept it, lengthy.

first approach:

you pushing uiviewcontroller inside of uinavigationcontroller. besides size of uiview (which root of uiviewcontroller) need remember size of uinavigationbar of uinavigationcontroller.

second approach:

you presenting full size of uiviewcontroller on screen (you not putting inside of anything).

as problem, it's bit weird sizes not updating according orientation. show printing values?