webViewDelegate and function - ios

Question

I'm writing a small webBrowser in swift and when someone clicks a link inside a webView, this needs to be detected and the link is open in another view. I wanted to implement this by putting the code for the webView function inside a separate file, so that I will be able to use the function multiple times without copy pasting it. Thing is that the function does not get's called when someone clicks a link. Should I add something to the ViewController class or to the class for the webView function?
import Foundation
import UIKit
class myWebViewController: UIWebView {
let VC1 = ViewController(nibName: nil, bundle: nil)
let VC2 = secondViewController(nibName: nil, bundle: nil)
func webView(webView: UIWebView!, shouldStartLoadWithRequest request: NSURLRequest!, navigationType: UIWebViewNavigationType) -> Bool {
if(navigationType == UIWebViewNavigationType.LinkClicked){
var url = (request.URL)
currentURL=url
webView.stopLoading()
if(webView.accessibilityIdentifier == "second"){
VC2.performSegueWithIdentifier("first", sender: VC2)
}
else {
VC1.performSegueWithIdentifier("second", sender: VC1)
}
// self.delegate?.didReceiveAPIResults(jsonResult)
//
// with
//
// dispatch_sync(dispatch_get_main_queue())
// {
// self.delegate?.didReceiveAPIResults(jsonResult)
// }
}
return true
}
}

Answer 1

Here is a version using WKWebView and swift. It opens the clicked link in safari while the navigation works normally if you use the web address.
class AppDelegate: UIResponder, UIApplicationDelegate {
lazy var window: UIWindow = {
let window = UIWindow(frame: UIScreen.mainScreen().bounds)
window.backgroundColor = UIColor.whiteColor()
window.rootViewController = UINavigationController(rootViewController: ViewController())
return window
}()
func application(application: UIApplication!, didFinishLaunchingWithOptions launchOptions: NSDictionary!) -> Bool {
window.makeKeyAndVisible()
return true
}
}
class ViewController: UIViewController, WKNavigationDelegate, UITextFieldDelegate {
lazy var webView:WKWebView = {
let webView = WKWebView(frame: CGRectZero)
webView.navigationDelegate = self
return webView
}()
let textField: UITextField = {
let textField = UITextField(frame: CGRectMake(0, 6, 100, 30))
textField.clearButtonMode = .WhileEditing
textField.placeholder = "Enter your url here:"
return textField
}()
override func loadView() {
view = webView
}
override func viewDidLoad() {
super.viewDidLoad()
textField.delegate = self
navigationItem.titleView = textField
}
func textFieldShouldReturn(textField: UITextField!) -> Bool {
if textField.isFirstResponder(){
textField.resignFirstResponder()
loadCurrentUrl()
}
return true
}
func loadCurrentUrl(){
let url = NSURL(string: textField.text)
let request = NSURLRequest(URL: url)
webView.loadRequest(request)
}
func webView(webView: WKWebView!, decidePolicyForNavigationAction navigationAction: WKNavigationAction!, decisionHandler: ((WKNavigationActionPolicy) -> Void)!) {
if navigationAction.navigationType == .LinkActivated{
UIApplication.sharedApplication().openURL(navigationAction.request.URL)
decisionHandler(.Cancel)
}else{
decisionHandler(.Allow)
}
}
}

Answer 2

First of all, you should set the delegate for the UIWebView.
Then, implement this method:
webView:shouldStartLoadWithRequest:navigationType
See the description of this method (Objective-C)
So, maybe you forgot to set the delegate. Check this ;)