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A WebView that automatically resizes itself - iOS - Swift
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1"> | |
| <title></title> | |
| <style> | |
| @font-face { | |
| font-family: 'Uni Neue'; | |
| src: local('Uni Neue'), url('UniNeueRegular.otf') format('opentype'); | |
| font-weight: 400; | |
| } | |
| @font-face { | |
| font-family: 'Uni Neue'; | |
| src: local('Uni Neue'), url('UniNeueRegular-Italic.otf') format('opentype'); | |
| font-style: italic; | |
| font-weight: 400; | |
| } | |
| @font-face { | |
| font-family: 'Uni Neue'; | |
| src: local('Uni Neue'), url('UniNeueBold.otf') format('opentype'); | |
| font-weight: bold; | |
| } | |
| body { | |
| font-family: 'Uni Neue', -apple-system; | |
| } | |
| ul { | |
| list-style: none; | |
| } | |
| ul li::before { | |
| content: "●"; | |
| color: #14AA4B; | |
| font-weight: bold; | |
| display: inline-block; | |
| width: 1em; | |
| margin-left: -1em; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| HTML_CONTENT | |
| </body> | |
| </html> |
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| import UIKit | |
| import WebKit | |
| final public class HtmlContentView: UIView, WKNavigationDelegate { | |
| private let webView: WKWebView = { | |
| let webConfiguration = WKWebViewConfiguration() | |
| let view = WKWebView(frame: .zero, configuration: webConfiguration) | |
| view.backgroundColor = .clear | |
| view.isOpaque = false | |
| view.scrollView.bounces = false | |
| view.scrollView.isScrollEnabled = false | |
| view.scrollView.showsVerticalScrollIndicator = false | |
| return view | |
| }() | |
| override public var intrinsicContentSize: CGSize { | |
| return CGSize(width: super.intrinsicContentSize.width, height: contentHeight) | |
| } | |
| private var contentHeight: CGFloat = 20 { | |
| didSet { invalidateIntrinsicContentSize() } | |
| } | |
| override public init(frame: CGRect) { | |
| super.init(frame: frame) | |
| setup() | |
| } | |
| required public init?(coder aDecoder: NSCoder) { | |
| super.init(coder: aDecoder) | |
| setup() | |
| } | |
| private func setup() { | |
| backgroundColor = .clear | |
| addSubview(webView) | |
| webView.frame = bounds | |
| webView.autoresizingMask = [.flexibleHeight, .flexibleWidth] | |
| webView.navigationDelegate = self | |
| } | |
| public func webView(_ webView: WKWebView, didFinish navigation: WKNavigation) { | |
| webView.evaluateJavaScript("document.body.scrollHeight;") { [weak self] (result, _) in | |
| let height = result as? NSNumber ?? 400 | |
| self?.contentHeight = CGFloat(height.floatValue) | |
| } | |
| } | |
| public func show(html: String) { | |
| contentHeight = 20.0 | |
| do { | |
| let bundle = Bundle(for: HtmlContentView.self) | |
| guard let path = bundle.path(forResource: "HtmlContentView", ofType: "html") else { return } | |
| let template = try String(contentsOfFile: path, encoding: String.Encoding.utf8) | |
| let html = template.replacingOccurrences(of: "HTML_CONTENT", with: html) | |
| webView.loadHTMLString(html, baseURL: NSURL.fileURL(withPath: bundle.bundlePath)) | |
| } catch { | |
| print("\(#file) - \(error)") | |
| } | |
| } | |
| } |
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