아이폰 운영 체제 iOS 4.0 신규 기능 정리

• Initial release on iPhone 4
• General New Features (신규 기능) 
  • Multitasking by double clicking home button (홈 단추 두번 누르기로 멀티태스킹. 멀티태스킹 모드를 지원하는 앱만 사용 가능. 기본적으로 내장된 앱들은 멀티태스킹으로 사용할 수 있지만, 상당수 앱들은 업데이트 필요)
  • Support for Apple Bluetooth keyboards (애플 블루투스 키보드 지원)
  • Game Center social network
  • iBooks with PDF support
  • iAd mobile advertising network
  • Portrait orientation lock

• Camera (카메라)
  • 
    5x digital zoom
  • Tap to focus video (일반 사진에서만 가능하던 기능을 비디오 촬영 시까지 확대)

• Settings (설정)
  • App-specific location settings (위치 서비스 사용 여부를 앱별로 설정 가능)
  • Cellular data only setting
  • Password with alphabet characters and numbers
  • Simple Passcode Lock (4 digit number) option
  • New Wallpapers
  • Wallpaper available for home screen
  • New Wallpaper preview for home screen and lock screen
  • Set up Internet Tethering
  • New Gmail and Exchange icons in Mail, Contacts, Calendars account settings
  • Support multiple Exchange accounts
  • Custom Dictionary

• Compass (나침반)
  • Remove the button link to Maps (Added back with build 8A248c β2.)

• Home Screen (홈 화면) 
  • Ability to categorize apps into folders with default folder naming based on category name in App Store
  • Up to 2,160 instead of 180 visible apps (12 apps per folder)
  • Folder name supports up to 13 characters
  • Custom backgrounds for Home screen and Lock Screen
  • Dock redesigned to that of the iPad
  • Rate on deleting app removed
  • Default utilities folder which contains the clock, calculator, voice memos and compass apps

• Photos (사진)
  • Categorized by Albums, Faces, Events and Places (under iPhoto in Mac OS X)
  • Select multiple photos for mass deletion (여러 사진 한 번에 지우기 가능)
  • Support landscape mode

• Camera Roll (카메라 롤)
  • Rotate photos
  • Resize photos
  • Categorization by All, Photos and Videos
  • Support landscape mode

• App Store
  • Ability to gift apps (유료 앱을 다른 사용자에게 선물로 전송하는 기능)

• Maps
  • Unified "locate me" icon
  • Background location icon shown on status bar (현재 앱이 위치 서비스를 사용하고 있다면 상태 막대에 관련 아이콘 표시)

• iPod
  • Playlist creation on device
  • Nested playlists
  • Lyrics and Podcast info on Setting
  • Volume control with Bluetooth headsets
  • Art in Album View

• Notes (메모)
  • Notes syncing with MobileMe, Gmail IMAP and Yahoo! Mail
  • Accounts management appears if syncing is enabled
  • Notes setting below Mail, Contacts, Calendars Settings if syncing is enabled
  • Moved search box into title bar

• Calendar (캘린더)
  • Birthday calendar
  • CalDAV invitations

• Contacts (연락처)
  • Unified Info by linking contacts from different accounts
  • CardDAV
  • Streamlined "New Contact" Screen

• Spotlight
  • Search with Web or Wikipedia

• Safari (Webkit version 532.9)
  • Bing is now a search option, along with Google and Yahoo (검색 옵션에 Bing 추가)
  • Recent Searches below search field
  • Top Hit in Search
  • Google Suggest appears below search field if Search Engine is set to Google
  • Unified "Search" keyboard button when search field being used
  • In-Page Video Playback (페이지 내에 삽입된 비디오 재생 시 전체 화면 모드로 전환되었으나, 이제는 페이지 내에 삽입된 상태로 재생 가능)

• YouTube
  • Rotate & Zoom Videos in vertical and horizontal Position

• Nike+
  • Upload workouts to Nike+

• Accessibility
  • Larger fonts in Mail, SMS & alerts

• Message
  • Include a Search bar
  • Character count (Can be enabled or disabled in Settings -> Messages screen)
  • Failed SMS Notification
  • Option to toggle off the ability to send group messages

• Mail
  • Unified Inboxes
  • Edit from Outbox
  • Support for multiple Exchange accounts
  • File & delete Mail search results
  • Organize By Thread in Mail
  • Quicklook attachments
  • Open attachments by registered filetype with corresponding Apps from App Store
  • Smart Links For Dates and Addresses
  • Contact Pictures in Emails
  • Create Calendar events from dates within emails

• International
  • Spell Check
  • Added Cangjie and Wubihua Keyboards for Simplified and Traditional Chinese
  • Text replacement between Simplified and Traditional Chinese
  • Switch keyboard shortcut (holding the "earth" button on keyboard for a while)
  • Added support for Danish voice control
  • Hungarian Language added

• Other
  • Persistent Wi-Fi (잠자기 모드에서도 와이파이 연결 상태 유지)
  • Wake on Wireless
  • Auto-join and Auto-login and IPv6 on individual Wi-Fi Networks setting
  • Enhanced data protection
  • Wireless app distribution
  • Mobile device management
  • SSL VPN support (both Juniper and Cisco)
  • Microsoft Exchange Server 2010 support
  • Improved Bluetooth driver for A2DP devices
• 주: iPod Touch 1st gen and iPhone 1st gen devices are not supported, while iPhone 3G and iPod touch 2nd gen have limited support. iPhone 4, iPhone 3GS, and iPod touch 3rd gen are all fully supported.