[아이폰] 3.5인치, 4인치에 맞춰 인트로 화면 크기 변경

//이미지뷰 초기화
if([[UIScreen mainScreen]bounds].size.height == 568){
  introView.image = [UIImage imageNamed:@"MainImage-568h"];
}else {
  introView.image = [UIImage imageNamed:@"MainImage"];
}