handling external links in swift UIWebKit? - ios

Question

I'm working on a webview using swift 4.
I'm loading local html files, in these pages are some links to other websites, but once I click on any of them I want to load them in safari or default browser instead of the WebView (browser).
my webView is called "browser"
Here are my ViewController.swift codes:
import UIKit
import WebKit
class ViewController: UIViewController {
#IBOutlet weak var browser: WKWebView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let htmlpath = Bundle.main.path(forResource: "kusrc/index", ofType: "html")
let url = URL(fileURLWithPath: htmlpath!)
let request = URLRequest(url: url)
browser.load(request)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Could somebody help me out? most of the results in google were not what I needed...
Is there the possibility to make an if sentence, where it gets asked if the stringprefix ="http:// or https://" then open safari, otherwise "browser"

Answer 1

I think you are looking for this delegate method:
func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: #escaping (WKNavigationActionPolicy) -> Void) {
if navigationAction.navigationType == .linkActivated {
guard let url = navigationAction.request.url else {
decisionHandler(.allow)
return
}
UIApplication.shared.open(url)
decisionHandler(.cancel)
} else {
decisionHandler(.allow)
}
}
If you want to differentiate according the URL scheme, you can use URLComponents to split the URL in its parts.
let components = URLComponents(url: url, resolvingAgainstBaseURL: false)
if components?.scheme == "http" || components?.scheme == "https" {
// insert your code here
}
// edit (a bit more detailed):
import WebKit on the very top of your class: import WebKit
Make your class compliant to the WKNavigationDelegate, by adding it behind the parent class: class ViewController: UIViewController, WKNavigationDelegate
Assign your class to the navigation delegate of the WKWebView: browser.navigationDelegate = self
Add the above code to your class
A gist of how your class should look like in the end: WKWebView open links in Safari
And here is a very nice tutorial about the topic: https://www.hackingwithswift.com/example-code/wkwebview/how-to-control-the-sites-a-wkwebview-can-visit-using-wknavigationdelegate