How do I open phone settings when a button is clicked?

Using UIApplication.openSettingsURLString

Update for Swift 5.1

 override func viewDidAppear(_ animated: Bool) {
    let alertController = UIAlertController (title: "Title", message: "Go to Settings?", preferredStyle: .alert)

    let settingsAction = UIAlertAction(title: "Settings", style: .default) { (_) -> Void in

        guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else {
            return
        }

        if UIApplication.shared.canOpenURL(settingsUrl) {
            UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
                print("Settings opened: \(success)") // Prints true
            })
        }
    }
    alertController.addAction(settingsAction)
    let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
    alertController.addAction(cancelAction)

    present(alertController, animated: true, completion: nil)
}

Swift 4.2

override func viewDidAppear(_ animated: Bool) {
    let alertController = UIAlertController (title: "Title", message: "Go to Settings?", preferredStyle: .alert)

    let settingsAction = UIAlertAction(title: "Settings", style: .default) { (_) -> Void in

        guard let settingsUrl = URL(string: UIApplicationOpenSettingsURLString) else {
            return
        }

        if UIApplication.shared.canOpenURL(settingsUrl) {
            UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
                print("Settings opened: \(success)") // Prints true
            })
        }
    }
    alertController.addAction(settingsAction)
    let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
    alertController.addAction(cancelAction)

    present(alertController, animated: true, completion: nil)
}

⚠️ Be careful!

This answer is based on undocumented APIs and recently (since iOS12) Apple is rejecting apps with this approach.

Original answer below

Swift 5

UIApplication.shared.open(URL(string: UIApplication.openSettingsURLString)!, options: [:], completionHandler: nil)

Swift 4

UIApplication.shared.open(URL(string: UIApplicationOpenSettingsURLString)!, options: [:], completionHandler: nil)

NOTE: The following method works for all the versions below iOS 11, for higher versions the app might get rejected since it's a private API

Sometimes we want to take a user to settings other than our app settings. The following method will help you achieve that:

First, configure the URL Schemes in your project. You will find it in Target -> Info -> URL Scheme. click on + button and type prefs in URL Schemes

enter image description here

Swift 5

UIApplication.shared.open(URL(string: "App-prefs:Bluetooth")!)

Swift 3

UIApplication.shared.open(URL(string:"App-Prefs:root=General")!, options: [:], completionHandler: nil)

Swift

UIApplication.sharedApplication().openURL(NSURL(string:"prefs:root=General")!)

Objective-C

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

and following are all the available URLs

**On IOS < 12 **

  • prefs:root=General&path=About
  • prefs:root=General&path=ACCESSIBILITY
  • prefs:root=AIRPLANE_MODE
  • prefs:root=General&path=AUTOLOCK
  • prefs:root=General&path=USAGE/CELLULAR_USAGE
  • prefs:root=Brightness
  • prefs:root=Bluetooth
  • prefs:root=General&path=DATE_AND_TIME
  • prefs:root=FACETIME
  • prefs:root=General
  • prefs:root=General&path=Keyboard
  • prefs:root=CASTLE
  • prefs:root=CASTLE&path=STORAGE_AND_BACKUP
  • prefs:root=General&path=INTERNATIONAL
  • prefs:root=LOCATION_SERVICES
  • prefs:root=ACCOUNT_SETTINGS
  • prefs:root=MUSIC
  • prefs:root=MUSIC&path=EQ
  • prefs:root=MUSIC&path=VolumeLimit
  • prefs:root=General&path=Network
  • prefs:root=NIKE_PLUS_IPOD
  • prefs:root=NOTES
  • prefs:root=NOTIFICATIONS_ID
  • prefs:root=Phone
  • prefs:root=Photos
  • prefs:root=General&path=ManagedConfigurationList
  • prefs:root=General&path=Reset
  • prefs:root=Sounds&path=Ringtone
  • prefs:root=Safari
  • prefs:root=General&path=Assistant
  • prefs:root=Sounds
  • prefs:root=General&path=SOFTWARE_UPDATE_LINK
  • prefs:root=STORE
  • prefs:root=TWITTER
  • prefs:root=FACEBOOK
  • prefs:root=General&path=USAGE prefs:root=VIDEO
  • prefs:root=General&path=Network/VPN
  • prefs:root=Wallpaper
  • prefs:root=WIFI
  • prefs:root=INTERNET_TETHERING
  • prefs:root=Phone&path=Blocked
  • prefs:root=DO_NOT_DISTURB

On IOS 13

  • App-prefs:General&path=About
  • App-prefs:AIRPLANE_MODE
  • App-prefs:General&path=AUTOLOCK
  • App-prefs:Bluetooth
  • App-prefs:General&path=DATE_AND_TIME
  • App-prefs:FACETIME
  • App-prefs:General
  • App-prefs:General&path=Keyboard
  • App-prefs:CASTLE
  • App-prefs:CASTLE&path=STORAGE_AND_BACKUP
  • App-prefs:General&path=INTERNATIONAL
  • App-prefs:MUSIC
  • App-prefs:NOTES
  • App-prefs:NOTIFICATIONS_ID
  • App-prefs:Phone
  • App-prefs:Photos
  • App-prefs:General&path=ManagedConfigurationList
  • App-prefs:General&path=Reset
  • App-prefs:Sounds&path=Ringtone
  • App-prefs:Sounds
  • App-prefs:General&path=SOFTWARE_UPDATE_LINK
  • App-prefs:STORE
  • App-prefs:Wallpaper
  • App-prefs:WIFI
  • App-prefs:INTERNET_TETHERING
  • App-prefs:DO_NOT_DISTURB

    Not tested

  • App-prefs:TWITTER (??)

  • App-prefs:FACEBOOK (??)
  • App-prefs:NIKE_PLUS_IPOD (??)

Note: Network setting will not be opened in a simulator, but the link will work on a real device.


SWIFT 5

if let settingsUrl = URL(string: UIApplication.openSettingsURLString) {

   UIApplication.shared.open(settingsUrl)

 }

In iOS 8+ you can do the following:

 func buttonClicked(sender:UIButton)
    {
        UIApplication.sharedApplication().openURL(NSURL(string: UIApplicationOpenSettingsURLString))
    }

Swift 4

    let settingsUrl = URL(string: UIApplicationOpenSettingsURLString)!
    UIApplication.shared.open(settingsUrl)

Using @vivek's hint I develop an utils class based on Swift 3, hope you appreciate!

import Foundation
import UIKit

public enum PreferenceType: String {

    case about = "General&path=About"
    case accessibility = "General&path=ACCESSIBILITY"
    case airplaneMode = "AIRPLANE_MODE"
    case autolock = "General&path=AUTOLOCK"
    case cellularUsage = "General&path=USAGE/CELLULAR_USAGE"
    case brightness = "Brightness"
    case bluetooth = "Bluetooth"
    case dateAndTime = "General&path=DATE_AND_TIME"
    case facetime = "FACETIME"
    case general = "General"
    case keyboard = "General&path=Keyboard"
    case castle = "CASTLE"
    case storageAndBackup = "CASTLE&path=STORAGE_AND_BACKUP"
    case international = "General&path=INTERNATIONAL"
    case locationServices = "LOCATION_SERVICES"
    case accountSettings = "ACCOUNT_SETTINGS"
    case music = "MUSIC"
    case equalizer = "MUSIC&path=EQ"
    case volumeLimit = "MUSIC&path=VolumeLimit"
    case network = "General&path=Network"
    case nikePlusIPod = "NIKE_PLUS_IPOD"
    case notes = "NOTES"
    case notificationsId = "NOTIFICATIONS_ID"
    case phone = "Phone"
    case photos = "Photos"
    case managedConfigurationList = "General&path=ManagedConfigurationList"
    case reset = "General&path=Reset"
    case ringtone = "Sounds&path=Ringtone"
    case safari = "Safari"
    case assistant = "General&path=Assistant"
    case sounds = "Sounds"
    case softwareUpdateLink = "General&path=SOFTWARE_UPDATE_LINK"
    case store = "STORE"
    case twitter = "TWITTER"
    case facebook = "FACEBOOK"
    case usage = "General&path=USAGE"
    case video = "VIDEO"
    case vpn = "General&path=Network/VPN"
    case wallpaper = "Wallpaper"
    case wifi = "WIFI"
    case tethering = "INTERNET_TETHERING"
    case blocked = "Phone&path=Blocked"
    case doNotDisturb = "DO_NOT_DISTURB"

}

enum PreferenceExplorerError: Error {
    case notFound(String)
}

open class PreferencesExplorer {

    // MARK: - Class properties -

    static private let preferencePath = "App-Prefs:root"

    // MARK: - Class methods -

    static func open(_ preferenceType: PreferenceType) throws {
        let appPath = "\(PreferencesExplorer.preferencePath)=\(preferenceType.rawValue)"
        if let url = URL(string: appPath) {
            if #available(iOS 10.0, *) {
                UIApplication.shared.open(url, options: [:], completionHandler: nil)
            } else {
               UIApplication.shared.openURL(url)
            }
        } else {
            throw PreferenceExplorerError.notFound(appPath)
        }
    }

}

This is very helpful since that API's will change for sure and you can refactor once and very fast!