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

Swift version: 5.2

Paul Hudson @twostraws May 28th 2019

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 webView1 = UIWebView()
webView1.loadHTMLString("<html><body><p>Hello!</p></body></html>", baseURL: nil)

And now here's the code for WKWebView:

let webView2 = WKWebView()
webView2.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.