CODEWITHSUNDEEP
iosswiftcocoapodswkwebview
tsil
tsil

Reputation: 2069

How to load local HTML file in WKWebView when developing an iOS framework

I developed an iOS framework that users can use with CocoaPod. But when using it in a project, there is an error on this line:

let url = Bundle(for: type(of: self)).url(forResource: "file_name", withExtension: "html", subdirectory: "assets")!

This line is in the framework and the error is:

Unexpectedly found nil while unwrapping an Optional value

In the framework, I have a folder named "assets" and a file named "file_name.html". The error happens only when it is used in a framework.

Upvotes: 2

Views: 351

Answers (2)

Anand
Anand

Reputation: 1946

It looks like "file_name.html" is missing in your Cocoapod framework. Please add it something like below in your podspec.

   s.resource_bundles = {
    'ResourceBundleName' => ['path/to/resources/Assets/*']
   }
   s.resources = "ResourceBundleName/**/*.{html,icon}"

Your code seems to be absolutely fine when i added it in one of the functions of my sample Framework project. No compilation error.

You can also use following code inside your pod to access the resource.

  let frameworkBundle = Bundle(for: self.classForCoder)
  let bundleURL = frameworkBundle.resourceURL?.appendingPathComponent("FrameworkName.bundle")
  let resourceBundle = Bundle(url: bundleURL!)
  let url = resourceBundle?.url(forResource: "file_name", withExtension: "html", subdirectory: "assets")!

Please see this link for more info on how to access resource from Framework: "https://useyourloaf.com/blog/loading-resources-from-a-framework/". Thought it will be helpful to you.

Upvotes: 1

Lukas Würzburger
Lukas Würzburger

Reputation: 6693

let url = Bundle(for: type(of: self)).url(forResource: "file_name", withExtension: "html", subdirectory: "assets")!
-------------------------------^

Make sure that self points to a class of the framework in order to find the right bundle. And you don't need to use type(of:_):

let bundle = Bundle(for: FrameworkClass.self)
let url = bundle.url(forResource: "file_name", withExtension: "html", subdirectory: "assets")!

Upvotes: 1

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