Hi there!
I'm new to App Development and I'm running into the following error when playing audio on a website loaded through a WKWebView:
0x112000cc0 - ProcessAssertion::acquireSync Failed to acquire RBS assertion 'WebKit Media Playback' for process with PID=70.197, error: Error Domain=RBSServiceErrorDomain Code=1 "(originator doesn't have entitlement com.apple.runningboard.assertions.webkit AND originator doesn't have entitlement com.apple.multitasking.systemappassertions)" UserInfo={NSLocalizedFailureReason=(originator doesn't have entitlement com.apple.runningboard.assertions.webkit AND originator doesn't have entitlement com.apple.multitasking.systemappassertions)}
Looking through this forum, it seems more people have this issue, yet no one has found a solution (or posted it...). The solutions that I did find (Background Modes capability, webView.configuration.allowsInlineMediaPlayback = true), did nothing.
To make sure the issue had nothing to do with my own code, I created an empty project to reproduce the issue. I'm not sure on the best way to share it, but it's a small file (forgive me, I have no clue what it does, actually chatGPT made it for me. My real application is a WebApp wrapped with Capacitor, so it handles all the Swift stuff)
import SwiftUI
import WebKit
struct WebView: UIViewRepresentable {
let urlString: String
func makeUIView(context: Context) -> WKWebView {
let webView = WKWebView()
webView.configuration.allowsInlineMediaPlayback = true
webView.configuration.allowsAirPlayForMediaPlayback = true
webView.navigationDelegate = context.coordinator
return webView
}
func updateUIView(_ uiView: WKWebView, context: Context) {
if let url = URL(string: urlString) {
let request = URLRequest(url: url)
uiView.load(request)
}
}
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
class Coordinator: NSObject, WKNavigationDelegate {
var parent: WebView
init(_ parent: WebView) {
self.parent = parent
}
func webView(_ webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error) {
print("Web page loading failed: \(error.localizedDescription)")
}
}
}
struct WebViewDemo: View {
var body: some View {
NavigationView {
WebView(urlString: "https://www.w3schools.com/html/tryit.asp?filename=tryhtml5_audio_all")
.navigationBarTitle("Web View")
}
}
}
struct WebView_Previews: PreviewProvider {
static var previews: some View {
WebViewDemo()
}
}
Nothing special, right?
When I build the app and navigate to a website that has an tag (https://www.w3schools.com/html/tryit.asp?filename=tryhtml5_audio_all). I still see the error when I play the audio.
It plays nonetheless, but the error is there. I'm not at all interested in actually playing audio in the background/when the app is closed/suspended. I just want the error to go away!
I've tried different iOS versions (14,15,16,17), but the problem persists.
Anyone know what's happening?