size - preferredContentSize not working in ios 7? -

i using modalpresentationstyle of type uimodalpresentationformsheet show view.i want specific size of view using preferredcontentsize working in ios 8 , showing exact how wanted same breaks ios 7 it's come full sheet.view size changed.

where wanted below image

any idea?

please check below conditional code ios 8.x , ios 7

if (system_version_greater_than_or_equal_to(@"8.0"))  {     modalcontroller.preferredcontentsize = cgsizemake(framesize.x, framesize.y);  } else  {     modalcontroller.view.superview.frame = cgrectmake((screenwidth - framesize.x)/2, (screenheight - framesize.y)/2, framesize.x, framesize.y);  } 

hope you.