在iOS5下面版本号使用下面方法：【IOS5.1+之后不能使用此方法。iOS8的跳转方法已找到见下方，iOS7的正在摸索，欢迎大家给出观点意见】

通过URL Scheme的方式打开内置的Settings，代码例如以下

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=LOCATION_SERVICES"]]; 

下面是内置的Settings的URL Scheme：

About — prefs:root=General&path=About

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

FaceTime — prefs:root=FACETIME

General — prefs:root=General

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

在iOS8版本号使用下面方法：

NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];

if ([[UIApplication sharedApplication] canOpenURL:url]) {

   [[UIApplication sharedApplication] openURL:url];

}  

iOS7版本号眼下还没发现解决的方法，欢迎大家多多讨论。。。。。