NSURL*url = [NSURL URLWithString:@"prefs:root=LOCATION_SERVICES"];
[[UIApplication sharedApplication] openURL:url];
//iOS>=10.0
[[UIApplication sharedApplication] openURL:url options:@{} completionHandler:^(BOOL success) {
}];iOS10以下调用系统设置的命令：
关于本机：prefs:root=General&path=About
软件升级：prefs:root=General&path=SOFTWARE_UPDATE_LINK
日期时间：prefs:root=General&path=DATE_AND_TIME
Accessibility：prefs:root=General&path=ACCESSIBILITY
键盘设置：prefs:root=General&path=Keyboard
VPN：prefs:root=General&path=VPN
壁纸设置:@"prefs:root=Wallpaper
声音设置：prefs:root=Sounds
隐私设置：prefs:root=privacy
APP Store：prefs:root=STORE
还原设置：prefs:root=General&path=Reset
应用通知：prefs:root=NOTIFICATIONS_ID&path=应用的boundleId
定位：prefs:root=LOCATION_SERVICES
蜂窝网络：prefs:root=MOBILE_DATA_SETTINGS_ID
VPN：prefs:root=General&path=Network/VPN
Wi-Fi：prefs:root=WIFI
定位服务：prefs:root=LOCATION_SERVICES
个人热点：prefs:root=INTERNET_TETHERING
辅助功能：prefs:root=General&path=ACCESSIBILITY
飞行模式：prefs:root=AIRPLANE_MODE
锁定：prefs:root=General&path=AUTOLOCK
亮度：prefs:root=Brightness
蓝牙：prefs:root=General&path=Bluetooth
时间设置：prefs:root=General&path=DATE_AND_TIME
FaceTime：prefs:root=FACETIME
设置：prefs:root=General
键盘设置：prefs:root=General&path=Keyboard
iCloud：prefs:root=CASTLE
iCloud备份：prefs:root=CASTLE&path=STORAGE_AND_BACKUP
语言：prefs:root=General&path=INTERNATIONAL
音乐：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
Wallpaper：prefs:root=Wallpaper
iOS8之后支持跳转到自己应用设置
NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];prefs:root=某项服务 适用于 小于 iOS10的系统； prefs:root=bundleID 适用于 大于等于iOS8系统，小于iOS10的系统 UIApplicationOpenSettingsURLString 适用于 大于等于iOS8的系统
