>=ios8 应用内跳转到系统设置界面-openURL

iOS8以后，苹果允许从应用内跳转到系统设置，但是调试结果表明，跳不到具体的设置项，使用前应该判断当前是否能够跳转到系统设置。

代码：

     NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
     if ([[UIApplication sharedApplication] canOpenURL:url]) {
         [[UIApplication sharedApplication] openURL:url];
     }else{
         NSLog(@"error");
     }

贴一下 iOS5.0之前 URL Scheme的用法：

 //location
     NSURL *url = [NSURL URLWithString:@"prefs:root=LOCATION_SERVICES"];
     if ([[UIApplication sharedApplication] canOpenURL:url]) {
         [[UIApplication sharedApplication] openURL:url];
     }else{
         NSLog(@"there....");
     }

 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
 Setting —prefs:root=INTERNET_TETHERING 

那ios7怎么办，布吉岛。。。                                                                                                                       其他有待测试，未完待续。。。