iOS：当 WKWebView 获取运动传感器时显示一个白色方块

Posted 2023-04-18

【中文标题】iOS：当 WKWebView 获取运动传感器时显示一个白色方块

【英文标题】：iOS : A white square is displayed when WKWebView gets a motion sensor

【发布时间】：2021-01-19 23:27:16

【问题描述】：

我正在制作一个使用 360 度图像的 VR 应用程序。 此应用程序显示带有 html 的图像。 WKWebView 可以获取设备的方向。

webView.uiDelegate = self

可以显示全向图像。

虽然，它在显示内容之前显示白色方框。 点按这个方块，就会出现电影控制器。 然后点击“X”关闭按钮，这个方形擦除消失，内容将开始。

以下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

据说没有MediaPlayback资源。

什么？它不需要Madiaplayer。

如何删除这个白色方块？ 如何禁用媒体播放？

以下是源码

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)
   

这个环境是： Xcode12.0.1 ios 14.0.1 (iPhoneXR) 斯威夫特 5.3

【问题讨论】：

你找到解决办法了吗？

是的。请参考答案。您可能还需要勾选“For Audio Playback”和“For Video Playback”才能勾选。

【参考方案1】：

WebView 的检查器，在 Inline Playback 处检查 true。

【讨论】：

我在哪里可以找到这个“WebView 检查器”屏幕？它在 Xcode 中的某个地方吗？