iOS：当WKWebView获取运动传感器时，将显示一个白色正方形

我正在制作一个使用360degee图像的虚拟现实应用程序。 此应用程序使用HTML显示图像。 WKWebView可用于获取设备的方向

webView.uiDelegate = self

可以显示全方位图像

不过，在显示内容之前，它会显示白色的方形框。 点击这个方块，电影控制器就会出现。 然后单击“X”关闭按钮，此方形擦拭消失，内容将开始

下面是我在模拟器上启动此应用程序时的错误消息

2020-10-05 14:03:00.220288+0900 WebViewButton[70653:4552750] [assertion] Error acquiring assertion: <Error Domain=RBSAssertionErrorDomain Code=3 "Required client entitlement is missing" UserInfo={RBSAssertionAttribute=<RBSDomainAttribute| domain:"com.apple.webkit" name:"MediaPlayback" sourceEnvironment:"(null)">, NSLocalizedFailureReason=Required client entitlement is missing}>
2020-10-05 14:03:00.220599+0900 WebViewButton[70653:4552750] [ProcessSuspension] 0x106df57e0 - ProcessAssertion: Failed to acquire RBS MediaPlayback assertion 'WebKit Media Playback' for process with PID 70655, error: Error Domain=RBSAssertionErrorDomain Code=3 "Required client entitlement is missing" UserInfo={RBSAssertionAttribute=<RBSDomainAttribute| domain:"com.apple.webkit" name:"MediaPlayback" sourceEnvironment:"(null)">, NSLocalizedFailureReason=Required client entitlement is missing}
2020-10-05 14:03:00.222371+0900 WebViewButton[70653:4552750] [assertion] Error acquiring assertion: <Error Domain=RBSAssertionErrorDomain Code=3 "Required client entitlement is missing" UserInfo={RBSAssertionAttribute=<RBSDomainAttribute| domain:"com.apple.webkit" name:"MediaPlayback" sourceEnvironment:"(null)">, NSLocalizedFailureReason=Required client entitlement is missing}>
2020-10-05 14:03:00.225196+0900 WebViewButton[70653:4552750] [ProcessSuspension] 0x106df5810 - ProcessAssertion: Failed to acquire RBS MediaPlayback assertion 'WebKit Media Playback' for process with PID 70653, error: Error Domain=RBSAssertionErrorDomain Code=3 "Required client entitlement is missing" UserInfo={RBSAssertionAttribute=<RBSDomainAttribute| domain:"com.apple.webkit" name:"MediaPlayback" sourceEnvironment:"(null)">, NSLocalizedFailureReason=Required client entitlement is missing}
2020-10-05 14:03:03.652871+0900 WebViewButton[70653:4552750] <CATransformLayer: 0x600003b09fe0> - changing property masksToBounds in transform-only layer, will have no effect
2020-10-05 14:03:03.653989+0900 WebViewButton[70653:4552750] <CATransformLayer: 0x600003b17200> - changing property masksToBounds in transform-only layer, will have no effect
2020-10-05 14:03:03.658501+0900 WebViewButton[70653:4552750] <CATransformLayer: 0x600003b0a520> - changing property masksToBounds in transform-only layer, will have no effect
2020-10-05 14:03:03.663858+0900 WebViewButton[70653:4552750] [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x600003b0a7e0> F8BB1C28-BAE8-11D6-9C31-00039315CD46
2020-10-05 14:03:03.704443+0900 WebViewButton[70653:4552750] <CATransformLayer: 0x600003b07a40> - changing property masksToBounds in transform-only layer, will have no effect
2020-10-05 14:03:03.706753+0900 WebViewButton[70653:4552750] <CATransformLayer: 0x600003b0b340> - changing property masksToBounds in transform-only layer, will have no effect
2020-10-05 14:03:03.727357+0900 WebViewButton[70653:4552750] <CATransformLayer: 0x600003b0a520> - changing property allowsGroupBlending in transform-only layer, will have no effect
2020-10-05 14:03:03.727779+0900 WebViewButton[70653:4552750] <CATransformLayer: 0x600003b07a40> - changing property allowsGroupBlending in transform-only layer, will have no effect

• 这种环境是： Xcode12.0.1 iOS 14.0.1（iPhoneXR） Swift 5.3

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WebView的检查器，在内联播放中检查是否为true

找到解决方案了吗？是的。请参考答案。您可能还需要选中“用于音频播放”和“用于视频播放”。

import UIKit
import WebKit

class WebViewController: UIViewController, WKNavigationDelegate, WKUIDelegate {
    @IBOutlet weak var webView: WKWebView!
    @IBOutlet weak var backBtn: UIButton!
    
    var rcvURL="" //Contents URL
    override func viewDidLoad() {
        super.viewDidLoad()
        webView.uiDelegate = self // enable to get omni direction sensor
        webView.navigationDelegate = self
        openUrl(urlString: rcvURL)
    }
    
    /** BackButton **/
    @IBAction func back(_ sender: Any) {
        self.dismiss(animated: true, completion: nil)
    }
    /** Open Contents URL **/
    func openUrl(urlString: String) {
       let url = URL(string: urlString)
       let request = NSURLRequest(url: url!)
       webView.load(request as URLRequest)
   }
}