Created
November 19, 2022 18:15
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Simple WebView in SwiftUI
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import Combine | |
import SwiftUI | |
import WebKit | |
struct WebView: NSViewRepresentable { | |
let url: URL | |
@Binding var title: String | |
private(set) var onCommitHandlers: [(URL) -> Void] = [] | |
func makeCoordinator() -> Coordinator { | |
Coordinator() | |
} | |
func makeNSView(context: Context) -> WKWebView { | |
let webview = WKWebView() | |
webview.navigationDelegate = context.coordinator | |
context.coordinator.setWebView(webview) | |
return webview | |
} | |
func updateNSView(_ webView: WKWebView, context: Context) { | |
context.coordinator.onCommitHandlers = onCommitHandlers | |
context.coordinator.title = $title | |
if context.coordinator.initialUrl != url { | |
context.coordinator.initialUrl = url | |
webView.load(URLRequest(url: url)) | |
} | |
} | |
func onCommit(perform handler: @escaping (URL) -> Void) -> Self { | |
var copy = self | |
copy.onCommitHandlers.append(handler) | |
return copy | |
} | |
final class Coordinator: NSObject, WKNavigationDelegate { | |
private weak var webView: WKWebView? | |
private var cancellables = Set<AnyCancellable>() | |
fileprivate var onCommitHandlers: [(URL) -> Void] = [] | |
fileprivate var initialUrl: URL? | |
fileprivate var title: Binding<String>? | |
func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) { | |
guard let url = webView.url else { | |
return | |
} | |
for handler in onCommitHandlers { | |
handler(url) | |
} | |
} | |
func setWebView(_ webView: WKWebView) { | |
self.webView = webView | |
webView.publisher(for: \.title) | |
.compactMap { $0 } | |
.sink { [weak self] newTitle in | |
self?.title?.wrappedValue = newTitle | |
} | |
.store(in: &cancellables) | |
} | |
} | |
} |
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