Xcode 9 GM中未解决的ARSessionConfiguration [英] ARSessionConfiguration unresolved in Xcode 9 GM

问题描述

我已经使用Xcode 9的beta版创建了ARKit项目，该项目能够在我的真实设备上运行而没有问题.
昨天，我升级到了Xcode 9 GM，并且在未接触任何东西的情况下，Xcode显示了多个错误，并说它不知道ARSessionConfiguration即:

I have created an ARKit project using a beta version of Xcode 9, which I was able to run on my real device without issues.
Yesterday, I upgraded to Xcode 9 GM, and without touching anything, Xcode shows multiple errors, saying it does not know ARSessionConfiguration i.e.:

使用未声明的类型'ARSessionConfiguration'

Use of undeclared type 'ARSessionConfiguration'

和:

使用未声明的类型'ARWorldTrackingSessionConfiguration'

Use of undeclared type 'ARWorldTrackingSessionConfiguration'

...对于此代码:

let session = ARSession()
var sessionConfig: ARSessionConfiguration = ARWorldTrackingSessionConfiguration()

我已经导入了ARKit，并且正在我的ViewController中使用ARSCNViewDelegate.
从Beta版本的Xcode打开项目时，它没有显示错误，我可以在手机上再次运行该应用程序.

I have imported ARKit and am using the ARSCNViewDelegate in my ViewController.
When opening the project from the beta version of Xcode, it does not show the errors and I can again run the app on my phone.

有什么主意我可以解决这个问题吗?

Any idea how I can fix this?

推荐答案

ARWorldTrackingSessionConfiguration已被弃用并重命名为ARWorldTrackingConfiguration:

ARWorldTrackingSessionConfiguration has been deprecated and renamed to ARWorldTrackingConfiguration: See here

此外，不推荐使用ARSessionConfiguration并将其重命名为ARConfiguration，现在它是一个抽象基类.

Also, ARSessionConfiguration has been deprecated and renamed to ARConfiguration, which is now an abstract base class.

当您不想进行世界跟踪时，请使用 AROrientationTrackingConfiguration ，而不要使用通用的ARConfiguration.因此:

Use AROrientationTrackingConfiguration when you don't want world tracking, instead of using a generic ARConfiguration. Thus:

let configuration = AROrientationTrackingConfiguration()

您还可以检查设备是否支持世界追踪:

You can also check if world tracking is supported on a device:

if ARWorldTrackingConfiguration.isSupported {
   configuration = ARWorldTrackingConfiguration()
}
else  {
   configuration = AROrientationTrackingConfiguration()
} 

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