How to instantiate a new view controller programmatically - ios

Question

I have a ViewController with two UIButtons and UIlabels.
In order to make similar ViewController of this, I would like to instantiate a new view controller programmatically
like this.
let vc = storyboard.instantiateViewControllerWithIdentifier("Main")
Then navigate to the view controller like this:
navigationcontroller?.pushViewController(vc, animated: true)
I have set StoryBoard ID as "Main", however I do not know where I can write these codes.
class ViewController: UIViewController, AVAudioPlayerDelegate {
let url1 = Bundle.main.bundleURL.appendingPathComponent("music1.mp3")
let url2 = Bundle.main.bundleURL.appendingPathComponent("music2.mp3")
#IBOutlet weak var label1: UILabel!
#IBOutlet weak var label2: UILabel!
#IBOutlet weak var yourButton1: customButton!
#IBOutlet weak var yourButton2: customButton!
override func viewDidLoad() {
super.viewDidLoad()
label1.text = "Hello1"
label2.text = "Hello2"
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func player(url: URL) {
do {
try player = AVAudioPlayer(contentsOf:url)
player.play()
} catch {
print(error)
}
}
#IBAction func pushButton1(sender: UIButton) {
player(url: url1)
}
#IBAction func pushButton2(sender: UIButton) {
player(url: url2)
}
}
tableView
class SecondTableViewController: UITableViewController {
var names = [String]()
var identities = [String]()
override func viewDidLoad() {
names = ["name1","name2","name3","name4"]
identities = ["Main","Main2","Main3","Main4"]
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return names.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell")
let label1 = cell?.viewWithTag(1) as! UILabel
label1.text = "\(names[indexPath.row])"
return cell!
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let vcName = identities[indexPath.row]
let ViewController = storyboard?.instantiateViewController(withIdentifier: vcName)
self.navigationController?.pushViewController(ViewController!, animated: true)
}
}

Answer 1

You need to set Storyboard ID value for the view controller in storyboard and use it here:
let storyboard = UIStoryboard(name: "StoryboardName", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "RegistrationController")
navigationcontroller?.pushViewController(vc, animated: true)
Edit:
var urls1 = [String]()
var urls2 = [String]()
override func viewDidLoad() {
names = ["name1","name2","name3","name4"]
identities = ["A","B","C","D"]
urls1 = ["url1","url2" ....]
urls2 = ["url1","url2" ....]
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let url1 = urls1[indexPath.row]
let url2 = urls2[indexPath.row]
//let ViewController = storyboard?.instantiateViewController(withIdentifier: vcName) this is wrong you only have one viewcontroller on storyboard and its storyboard id is fixed.
let viewController: ViewController = storyboard?.instantiateViewController(withIdentifier: "StoryboardID") as! ViewController
viewController.url1 = url1
viewController.url2 = url2
self.navigationController?.pushViewController(ViewController!, animated: true)
}