[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=Privacy&path=CONTACTS"]];

跳轉到設置各個頁面，如果想訪問子目錄，加上大的目錄&path＝子目錄名字（大寫）。例如 要訪問 設置 -> 隱私 -> 通訊錄 對應是? prefs:root=Privacy&path=CONTACTS? ? ? 其中Privacy＝ 隱私? ? ? 通訊錄＝通訊錄

About — prefs:root=General&path=About?? (關于)

Accessibility — prefs:root=General&path=ACCESSIBILITY

Airplane Mode On — prefs:root=AIRPLANE_MODE

Auto-Lock — prefs:root=General&path=AUTOLOCK

Brightness — prefs:root=Brightness

Bluetooth — prefs:root=General&path=Bluetooth

Date & Time — prefs:root=General&path=DATE_AND_TIME（時間）

FaceTime — prefs:root=FACETIME

General — prefs:root=General（通用）

Keyboard — prefs:root=General&path=Keyboard

iCloud — prefs:root=CASTLE

iCloud Storage & Backup — prefs:root=CASTLE&path=STORAGE_AND_BACKUP

International — prefs:root=General&path=INTERNATIONAL

Location Services — prefs:root=LOCATION_SERVICES

Music — prefs:root=MUSIC

Music Equalizer — prefs:root=MUSIC&path=EQ

Music Volume Limit — prefs:root=MUSIC&path=VolumeLimit

Network — prefs:root=General&path=Network

Nike + iPod — prefs:root=NIKE_PLUS_IPOD

Notes — prefs:root=NOTES

Notification — prefs:root=NOTIFICATIONS_ID

Phone — prefs:root=Phone

Photos — prefs:root=Photos

Profile — prefs:root=General&path=ManagedConfigurationList

Reset — prefs:root=General&path=Reset

Safari — prefs:root=Safari

Siri — prefs:root=General&path=Assistant

Sounds — prefs:root=Sounds

Software Update — prefs:root=General&path=SOFTWARE_UPDATE_LINK

Store — prefs:root=STORE

Twitter — prefs:root=TWITTER

Usage — prefs:root=General&path=USAGE

VPN — prefs:root=General&path=Network/VPN

Wallpaper — prefs:root=Wallpaper

Wi-Fi — prefs:root=WIFI

Contacts-- prefs:root=Privacy&path=CONTACTS（通訊錄）