AVCaptureSession横屏下图层方向问题（swift）

最新推荐文章于 2025-07-07 20:27:22 发布

Lw_Chen

最新推荐文章于 2025-07-07 20:27:22 发布

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本文链接：https://blog.youkuaiyun.com/Lw_Chen/article/details/51133459

本文探讨了在Swift编程中遇到的AVCaptureSession在横屏模式下图层方向的问题，以及如何将UIInterfaceOrientation转换为AVCaptureVideoOrientation的方法。

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http://stackoverflow.com/questions/24110610/enum-conversion-of-uiinterfaceorientation-to-avcapturevideoorientation-in-swift

As I noted in my comments, since AVCaptureVideoOrientation and UIInterfaceOrientation don't match up their cases, you can use something like:

extension AVCaptureVideoOrientation {
    var uiInterfaceOrientation: UIInterfaceOrientation {
        get {
            switch self {
            case .LandscapeLeft:        return .LandscapeLeft
            case .LandscapeRight:       return .LandscapeRight
            case .Portrait:             return .Portrait
            case .PortraitUpsideDown:   return .PortraitUpsideDown
            }
        }
    }

    init(ui:UIInterfaceOrientation) {
        switch ui {
        case .LandscapeRight:       self = .LandscapeRight
        case .LandscapeLeft:        self = .LandscapeLeft
        case .Portrait:             self = .Portrait
        case .PortraitUpsideDown:   self = .PortraitUpsideDown
        default:                    self = .Portrait
        }
    }
}

then use it as:

if let connection = cameraView.previewLayer?.connection {
    connection.videoOrientation = AVCaptureVideoOrientation(ui:self.interfaceOrientation)
}