How to create a silent switch override? - swift

Question

I have users complaining that there is no sound in my application. I found that this is usually because the silent switch is turned on, and with the handy reply tool I can usually tell them this... however this seem to be an ongoing issue and I need to fix this. I found a way to disable the silent switch with the following code.
import UIKit
import AVKit
import AVFoundation
class InitialViewController: UIViewController {
let defaults = UserDefaults.standard
override func viewDidLoad() {
super.viewDidLoad()
do {
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
//print("AVAudioSession Category Playback OK")
do {
try AVAudioSession.sharedInstance().setActive(true)
//print("AVAudioSession is Active")
} catch _ as NSError {
//print(error.localizedDescription)
}
} catch _ as NSError {
//print(error.localizedDescription)
}
}
}
Fortunately, this code works, but I want users to still have control over whether this code is enabled or not. By default, I want it enabled and let the users toggle this feature on or off. For my other view controller I have this:
import UIKit
import AVFoundation
class CustomTableView: UITableViewController {
let defaults = UserDefaults.standard
let OverrideSwitch2 = "OverrideSwitch2"
#IBOutlet weak var OverrideSwitch: UISwitch!
override func viewDidLoad() {
super.viewDidLoad()
if let fixFin = defaults.value(forKey: OverrideSwitch2) {
OverrideSwitch.isOn = fixFin as! Bool
}
}
#IBAction func `switch`(_ sender: UISwitch) {
defaults.set(sender.isOn, forKey: "OverrideSwitch2")
if (sender.isOn == true){
//Code to switch feature on
} else {
//Code to switch feature off
}
}
}
I have set up an NSUserDefault on the switch so the project remembers the preference, and since it's a simple boolean I could just paste the code in both switch states with one being 'false.' However, this switch is on another view controller and I need my code to be on the initial view controller, otherwise the code doesn't work until the user goes into preferences to change it. I need some help on setting up a switch that can toggle this code on/off and for the UserDefault to remember it.

Answer 1

So I can't believe I figured it out, but I just created another UserDefault that would set a boolean. If true, the code for the AVAudioSession gets run. If false, nothing gets executed. This UserDefault gets toggled through the switch, which also has a UserDefault to remember the switch state.
The Code is as follows:
import UIKit
import CoreGraphics
import AVFoundation
class CustomTableView: UITableViewController {
//This is for the NSUserDefaults
let defaults = UserDefaults.standard
let OverrideSwitch2 = "OverrideSwitch2"
//This Outlet connects the Switch
#IBOutlet weak var OverrideSwitch: UISwitch!
override func viewDidLoad() {
super.viewDidLoad()
//These if statements only run if one is true or false
//True: AVAudioSession is initialized; Silent Switch is Overridden
if UserDefaults.standard.bool(forKey: "Key") == true {
do {
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
//print("AVAudioSession Category Playback OK")
do {
try AVAudioSession.sharedInstance().setActive(true)
print("AVAudioSession")
} catch _ as NSError {
//print(error.localizedDescription)
}
} catch _ as NSError {
//print(error.localizedDescription)
}
}
//False: No Code is executed, silent switch works as normal
if UserDefaults.standard.bool(forKey: "Key") == false {
//No Code Here
}
//This NSUserDefault remembers if the switch is on or off
if let switchState = defaults.value(forKey: OverrideSwitch2) {
OverrideSwitch.isOn = switchState as! Bool
}
}
//This IBAction is connected to the switch; It toggles the UserDefault which your app will remember next time you run it
#IBAction func switchIsChanged(_ OverrideSwitch: UISwitch) {
defaults.set(OverrideSwitch.isOn, forKey: "OverrideSwitch2")
if OverrideSwitch.isOn == true {
UserDefaults.standard.set(true, forKey: "Key")
} else {
UserDefaults.standard.set(false, forKey: "Key")
}
}
}
Simply put, if you toggle the switch 'On' the NSUserDefault runs a function to initialize the session which will only run if the bool is 'true.' If it's false then nothing is run. All I need now is alert telling the user that enabling or disabling the override will only work once they restart the app.