Calling a function from one ViewController to another - ios

Question

I have two functions that i would like to call in another ViewController. I don't want to write the same code in the other Viewcontroller. I have tried creating a ViewController object and call the two methods this but keep getting crashes. I have also tried extending the UIViewController but no luck. How can i go on about
import UIKit
import WebKit
class PrivacyPolicyController: UIViewController, WKUIDelegate {
var webView: WKWebView!
override func loadView() {
super.loadView()
createWebView()
}
override func viewDidLoad() {
super.viewDidLoad()
loadURL(url: "https://www.apple.com")
}
func loadWebView() {
let webConfiguration = WKWebViewConfiguration()
webView = WKWebView(frame: .zero, configuration: webConfiguration)
webView.uiDelegate = self
view = webView
}
func loadURL(url: String) {
guard let myURL = URL(string: url) else { return }
let myRequest = URLRequest(url: myURL)
webView.load(myRequest)
}
}
I wanna call loadURL and loadWebView functions in this ViewController
import UIKit
import WebKit
class TermsAndConditionsController: UIViewController{
override func loadView() {
super.loadView()
}
override func viewDidLoad() {
super.viewDidLoad()
}
}
The ViewController where actions are performed
import UIKit
class WelcomeViewController: UIViewController {
#IBAction func termsAndConditionsTapped(_ sender: UIButton) {
let termsAndConditions = TermsAndConditionsController()
self.navigationController?.pushViewController(termsAndConditions, animated: true)
}
#IBAction func privacyPolicyTapped(_ sender: UIButton) {
let privacyPolicy = PrivacyPolicyController()
self.navigationController?.pushViewController(privacyPolicy, animated: true)
}
}

Answer 1

As I wrote in a comment, use the same viewcontroller for both the Privacy Policy and T&C:
import UIKit
import WebKit
class MyWebViewController: UIViewController {
var webView: WKWebView!
override func viewDidLoad() {
super.viewDidLoad()
}
func loadWebView() {
let webConfiguration = WKWebViewConfiguration()
self.webView = WKWebView(frame: .zero, configuration: webConfiguration)
self.view.addSubview(self.webView)
webView.translatesAutoresizingMaskIntoConstraints = false
webView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor).isActive = true
webView.topAnchor.constraint(equalTo: self.view.topAnchor).isActive = true
webView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor).isActive = true
webView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true
}
func loadURL(url: String) {
guard let myURL = URL(string: url) else { return }
let myRequest = URLRequest(url: myURL)
if (self.webView == nil) {
self.loadWebView()
}
self.webView.load(myRequest)
}
}
Then:
import UIKit
class MakeItHappenViewController: UIViewController {
#IBAction func termsAndConditionsTapped(_ sender: UIButton) {
let termsAndConditions = MyWebViewController()
self.navigationController?.pushViewController(termsAndConditions, animated: true)
termsAndConditions.loadURL("http://someurl.com")
}
#IBAction func privacyPolicyTapped(_ sender: UIButton) {
let privacyPolicy = MyWebViewController()
self.navigationController?.pushViewController(privacyPolicy, animated: true)
privacyPolicy.loadURL("http://someotherurl.com")
}
}

Answer 2

You can create Base class(Which inherits UIViewController) for that and make your both view controller inherit the base class. That way you can have both the methods in both classes and you can just make calls to them
Class BaseClass: UIViewController{
var webView: WKWebView
func loadWebView() {
let webConfiguration = WKWebViewConfiguration()
webView = WKWebView(frame: .zero, configuration: webConfiguration)
webView.uiDelegate = self
}
func loadURL(url: String) {
guard let myURL = URL(string: url) else { return }
let myRequest = URLRequest(url: myURL)
webView.load(myRequest)
}}
The base class now has all the required methods for creating adding and realoading url for web view. Now for view controller classes.
Class PrivacyPolicyController: BaseClass, WKUIDelegate {func methodWhereYouwantToCallWebviewMthods(){
self.loadWebView()
self.loadURL()
self.view = self.webView}}
Same for other class
class TermsAndConditionsController: BaseClass{func methodWhereYouwantToCallWebviewMthods(){
self.loadWebView()
self.loadURL()
self.view = self.webView}
override func loadView() {
super.loadView()
}
override func viewDidLoad() {
super.viewDidLoad()
}}