blocks|key|299757|text|确保在文件顶部导入SceneKit。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|299758|import+SceneKit|code-block|syntax|javascript|299759|打开“Main.storyboard”文件。选择ViewController+->视图，转到“标识检查器”，并将->字段更改为SCNView。SceneKit帮助|offset|length|299760|entityMap|0|LINK|mutability|MUTABLE|url|https://www.weheartswift.com/introduction-scenekit-part-1/^0|0|0|1Z|A|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

<p>Make sure to also import SceneKit at the top of the file.</p>

<pre><code>import SceneKit
</code></pre>

<p>Open the “Main.storyboard” File. Select ViewController -> View go to “Identity Inspector” and change the Class field to SCNView.
<a href="https://www.weheartswift.com/introduction-scenekit-part-1/" rel="noreferrer">SceneKit Help</a></p>


blocks|key|299785|text|如果您是以编程方式设置所有这些内容，而不使用故事板，请确保执行以下步骤：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|299786|通用->部署信息->清除主接口部分，留空。|ordered-list-item|299787|转到AppDelegate.swift并分配窗口的rootViewController|299788|​|299789|func+application(_+application:+UIApplication,+didFinishLaunchingWithOptions+launchOptions:+[UIApplicationLaunchOptionsKey:+Any]?)+->+Bool+{
++++window+=+UIWindow()
++++let+gameViewController+=+GameViewController()
++++window?.rootViewController+=+gameViewController
++++window?.makeKeyAndVisible()
++++return+true
}|code-block|syntax|javascript|299790|299791|转到GameViewController，此处不要将GameViewController的视图转换为SCNView，而是创建SCNView实例并添加类似于subView的内容：|299792|299793|let+scnView+=+SCNView(frame:+view.frame)
view.addSubview(scnView)|299794|299795|entityMap^0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|Y|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|Z|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|10|8|@]|9|@]|A|$L|M]]|$1|N|3|H|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|12|8|@]|9|@]|A|$]]|$1|Q|3|H|5|6|7|13|8|@]|9|@]|A|$]]|$1|R|3|S|5|K|7|14|8|@]|9|@]|A|$L|M]]|$1|T|3|H|5|6|7|15|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|V|$]]

<p>If you are setting all these stuff programmatically without storyboard, make sure to do these steps:</p>

<ol>
<li>General -> Deployment Info -> Clear the Main Interface section, leave empty.</li>
<li>Go to AppDelegate.swift and assign rootViewController of window</li>
</ol>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -&gt; Bool {
    window = UIWindow()
    let gameViewController = GameViewController()
    window?.rootViewController = gameViewController
    window?.makeKeyAndVisible()
    return true
}</code></pre>
</div>
</div>
</p>

<ol start="3">
<li>Go to GameViewController and here don't cast GameViewController's view to SCNView, instead create SCNView instance and add like subView:</li>
</ol>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>let scnView = SCNView(frame: view.frame)
view.addSubview(scnView)</code></pre>
</div>
</div>
</p>


blocks|key|2326393|text|当我删除一个UIButton，它也删除了UIView时，我也发生了同样的事情。因此，添加一个UIView并将类更改到SCNView|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2326394|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

<p>Same thing happened to me when I deleted a UIButton, which also deleted the UIView. So add a UIView and change class to SCNView</p>


blocks|key|299867|text|如果以编程方式执行此操作，请添加以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|299868|++++override+func+loadView()+{
++++++++//sort+of+like+changes+type+of+self.view+from+UIView+to+SCNView
++++++++self.view+=+SCNView()
++++}|code-block|syntax|javascript|299869|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>If you're doing this programmatically, add the following code:</p>
<pre><code>    override func loadView() {
        //sort of like changes type of self.view from UIView to SCNView
        self.view = SCNView()
    }
</code></pre>


<p>App was building fine until I started adding buttons to the storyboard then I got the above error. It stops at this line of code inside my GameViewController.</p>

<pre><code>let scnView = self.view as! SCNView
</code></pre>

<p>The storyboard itself has its custom class set to GameViewController (theres no option for SCNView). GameViewController itself inherits from UIViewController.
Im using Xcode7.2.</p>


Could not cast value of type 'UIView' to 'SCNView'

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在我开始在故事板上添加按钮之前，App的构建还不错，然后我得到了上面的错误。它停留在我的GameViewController中的这一行代码。let scnView = self.view as! SCNView故事板本身将其自定义类设置为GameViewController (没有SCNView选项)。GameView...

问无法将“UIView”类型的值转换为“SCNView”
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问无法将“UIView”类型的值转换为“SCNView”EN