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How to load a HTML string into a WKWebView or UIWebView: loadHTMLString()

Available from iOS 2.0 – see Hacking with Swift tutorial 7

If you want to generate HTML locally and show it inside your app, it's easy to do in both UIWebView and WKWebView. First, here's the code for UIWebView:

let webView = UIWebView()
webView.loadHTMLString("<html><body><p>Hello!</p></body></html>", baseURL: nil)

And now here's the code for WKWebView:

let webView = WKWebView()
webView.loadHTMLString("<html><body><p>Hello!</p></body></html>", baseURL: nil)

If you want to load resources from a particular place, such as JavaScript and CSS files, you can set the baseURL parameter to any URL. This could, for example, be the resource path for your app bundle, which would allow you to use local images and other assets alongside your generated HTML.

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