Question

我正在从数据库下载图像，并希望将它们用作ARReferenceImage，而不是手动将它们添加到Xcode资产文件夹中。

代码

    let image = #imageLiteral(resourceName: "mike")
    let cgImage = image.cgImage

    guard let referenceImages = ARReferenceImage.init(cgImage, orientation: .portrait, physicalWidth: 100) else {
        fatalError("Failed to load image")
    }

错误

对成员'init（_：orientation：physicalWidth：）'

的模糊引用

Answer 1

CGImagePropertyOrientation不支持.portrait请使用以下支持：

public enum CGImagePropertyOrientation : UInt32 {


    case up // 0th row at top,    0th column on left   - default orientation

    case upMirrored // 0th row at top,    0th column on right  - horizontal flip

    case down // 0th row at bottom, 0th column on right  - 180 deg rotation

    case downMirrored // 0th row at bottom, 0th column on left   - vertical flip

    case leftMirrored // 0th row on left,   0th column at top

    case right // 0th row on right,  0th column at top    - 90 deg CW

    case rightMirrored // 0th row on right,  0th column on bottom

    case left // 0th row on left,   0th column at bottom - 90 deg CCW
}

您的代码：

 let referenceImages = ARReferenceImage(cgImage!, orientation: CGImagePropertyOrientation.up, physicalWidth: 100)

或

let referenceImages = ARReferenceImage.init(cgImage!, orientation: CGImagePropertyOrientation.up, physicalWidth: 100)

Answer 2

CGImagePropertyOrientation没有名为.portrait的成员。

根据documentation，它有.up，.upMirrored，.down，.downMirrored，.leftMirrored，.right，{ {1}}，.rightMirrored。如果你在初始化程序中使用其中一个，它应该可以工作。

例如：

.left

以编程方式创建ARReferenceImage

2 个答案: