在WKWebView中使用自定义本地存储字体

let fontName = "CustomFontName"
let fontURL = Bundle.main.url(forResource: fontName, withExtension: "ttf")
let fontString = """
    @font-face {
        font-family: '\(fontName)';
        src: url('\(fontURL?.absoluteString ?? "")') format('truetype');
    }
    body {
        font-family: '\(fontName)';
    }
    """

let userScript = WKUserScript(source: fontString, injectionTime: .atDocumentStart, forMainFrameOnly: true)
let userContentController = WKUserContentController()
userContentController.addUserScript(userScript)

let configuration = WKWebViewConfiguration()
configuration.userContentController = userContentController

let webView = WKWebView(frame: .zero, configuration: configuration)