WKWebView does not load local html files

Question

I have a WKWebView that works perfectly fine when given a URL or a URLRequest, but when I am trying to load local bundle html files into it, it just doesn't display anything.

I am trying it like so:

let webView = WKWebView()

if let bundleURL = Bundle.main.url(forResource: "index", withExtension: "html", subdirectory: "mySubDirectory/v1") {
    webView.loadFileURL(bundleURL, allowingReadAccessTo: bundleURL.deletingLastPathComponent())
}

I have tested that the bundleURL actually returns the right path and tried copying + pasting it in my browser at run time and it works great: file:///Users/myuser/Library/Developer/Xcode/DerivedData/FireApp-gugmufgdkejtfdhglixebzhokhfe/Build/Products/Debug-iphonesimulator/SteppingIntoFireFramwork.framework/mySubDirectory/v1/index.html

What could be the problem?

JozeRi · Answer 1 · 2018-07-18T13:22:28.853

2

If the URL works, then it seems that your webview is having trouble loading it.

I once had this issue... Check that you don’t have only “http” & “https” enabled for the allowed URL scheme

edited Jul 18 '18 at 13:22

answered Jul 18 '18 at 13:02

JozeRi

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1

OMFG, someone actually enabled `http` and `https` only for the webview to load! Thanks a lot! I would not have found it otherwise :O – Erez Hod Jul 18 '18 at 13:04
1

Where is that option? I couldn't find it. – Gerard Jun 15 '19 at 17:30
1

@Gerard I can not find it either. It used to be under `Info.pList`. – lolololol ol Jul 06 '19 at 20:48

score 0 · Answer 2 · edited Jul 18 '18 at 12:48

import UIKit
import WebKit

class ViewController: UIViewController, WKNavigationDelegate {
    override func viewDidLoad() {
        super.viewDidLoad()
        let webView = WKWebView()
        let htmlPath = Bundle.main.path(forResource: "index", ofType: "html")
        let htmlUrl = URL(fileURLWithPath: htmlPath!, isDirectory: false)
        webView.loadFileURL(htmlUrl, allowingReadAccessTo: htmlUrl)
        webView.navigationDelegate = self
        view = webView
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}

Full solution here

score 0 · Answer 3 · answered Jul 18 '18 at 12:53

0

Your web view is just a local temporary variable. It has zero size and is not in the interface, so you never see anything happen.

answered Jul 18 '18 at 12:53

matt

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score 0 · Answer 4 · answered Jul 18 '18 at 12:57

Try to remove deletingLastPathComponent() from your example. Also you can try to use load(request) instead of loadFileURL().

if let bundleURL = Bundle.main.url(forResource: "index", withExtension: "html", subdirectory: "mySubDirectory/v1") {
    let request = URLRequest(url: bundleURL)
    webView.load(request)
}

WKWebView does not load local html files

4 Answers4