[iOS] 네비게이션(Navigation)과 모달(Modality)
네비게이션(Navigation) 종류 Hierarchical Flat Content-Driven or Experience-Driven 모달(Modality) 종류 Alerts Activity Views Sharing and Actions Action Sheets 모달(Modality) 스타일 Automatic FullScreen PopOver PageSheet and FormSheet Current Context Custom
