'ARFrame' 类型的值没有成员 'viewTrans'

Question

我不知道如何解决这个错误：

Value of type 'ARFrame' has no member 'viewTrans'

当我尝试用谷歌搜索错误时，没有任何结果。下面是一个代码片段，我在产生此错误的行的正上方放置了一个名为 //ERROR 的注释。

var viewTrans : CGAffineTransform? = nil


func session(_ session: ARSession, didUpdate frame: ARFrame) {

    let depthData = frame.capturedDepthData
    if depthData != nil {

        self.displayCalibrationData(depthData: (frame.capturedDepthData?.cameraCalibrationData)!, colorData: frame.camera.intrinsics)

        // Render depth data to background texture (not quite as fast as using Metal textures)
        let depthBuffer : CVPixelBuffer = depthData!.depthDataMap
        let colorBuffer : CVPixelBuffer = frame.capturedImage
        // Output scene dimensions
        let frameWidth = sceneView.frame.size.width
        let frameHeight = sceneView.frame.size.height
        let targetSize = CGSize(width: frameWidth, height: frameHeight)
        // ERROR
        self.viewTrans = frame.viewTrans(for: UIInterfaceOrientation.portrait, viewportSize: targetSize)

        renderDepthColorOverlay(depthBuffer: depthBuffer, colorBuffer: colorBuffer, viewTrans: self.viewTrans!, targetSize: targetSize)
    }
}

Answer 1

ARFrame 没有任何 viewTrans 方法： https://developer.apple.com/documentation/arkit/arframe

相反，您应该更改此行：

self.viewTrans = frame.viewTrans(for: UIInterfaceOrientation.portrait, viewportSize: targetSize)

为此：

self.viewTrans = frame.displayTransform(for: UIInterfaceOrientation.portrait, viewportSize: targetSize)

displayTransform(for:viewportSize:) Returns an affine transform for converting between normalized image coordinates and a coordinate space appropriate for rendering the camera image onscreen.

看这里：https://developer.apple.com/documentation/arkit/arframe/2923543-displaytransform

'ARFrame' 类型的值没有成员 'viewTrans'

Value of type 'ARFrame' has no member 'viewTrans'

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