iOS: Make the PDF view same size as the device width height -

there grey colour in background , cannot make full size of pdf. there way make full screen of pdf? have detected orientation , made pdf size accordingly.

edited:

nsstring *path = [[nsbundle mainbundle] pathforresource:@"pdf2" oftype:@"pdf"]; nsurl *pdfurl = [nsurl fileurlwithpath:path]; pdfdocument = cgpdfdocumentcreatewithurl((__bridge cfurlref)pdfurl); totalpages = (int)cgpdfdocumentgetnumberofpages(pdfdocument); //modelarray holds page numbers modelarray = [[nsmutablearray alloc] init];  (int index = 1; index <= totalpages; index++) {      [modelarray addobject:[nsstring stringwithformat:@"%i", index]];  }  thepageviewcontroller = [[uipageviewcontroller alloc]                          initwithtransitionstyle:uipageviewcontrollertransitionstylepagecurl                            navigationorientation:uipageviewcontrollernavigationorientationhorizontal                                          options:nil];  thepageviewcontroller.delegate = self; thepageviewcontroller.datasource = self;  thepageviewcontroller.view.autoresizingmask = uiviewautoresizingflexiblewidth | uiviewautoresizingflexibleheight;  contentviewcontroller = [[contentviewcontroller alloc] initwithpdf:pdfdocument]; contentviewcontroller.page = [modelarray objectatindex:0]; nsarray *viewcontrollers = [nsarray arraywithobject:contentviewcontroller]; [thepageviewcontroller setviewcontrollers:viewcontrollers direction:uipageviewcontrollernavigationdirectionforward animated:no completion:nil];  [self addchildviewcontroller:thepageviewcontroller]; [self.view addsubview:thepageviewcontroller.view]; thepageviewcontroller.view.frame = cgrectmake(0, 0, self.view.frame.size.width, self.view.frame.size.height);  [thepageviewcontroller didmovetoparentviewcontroller:self];  self.view.backgroundcolor = [uicolor underpagebackgroundcolor];