Image rotates automatically

[shivamgarg102]

** After capturing image, when i place that image on same ViewController, sometimes it rotates automatically. Please suggest me something to resolve this issue. Thanks! **

[ashwaniInsigma]

Same issue happening with me. If I capture image in landscape mode two times and if I capture image third time the output image should be portrait while it showing landscape.

[rameezhandel]

I was facing the same issue, I used the following extension to rotate the image based on device rotation:

` extension UIImage {

/// Fix image orientaton to protrait up
func fixedOrientation() -> UIImage? {
    guard imageOrientation != UIImage.Orientation.up else {
        // This is default orientation, don't need to do anything
        return self.copy() as? UIImage
    }
    
    guard let cgImage = self.cgImage else {
        // CGImage is not available
        return nil
    }
    
    guard let colorSpace = cgImage.colorSpace, let ctx = CGContext(data: nil, width: Int(size.width), height: Int(size.height), bitsPerComponent: cgImage.bitsPerComponent, bytesPerRow: 0, space: colorSpace, bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue) else {
        return nil // Not able to create CGContext
    }
    
    var transform: CGAffineTransform = CGAffineTransform.identity
    
    switch imageOrientation {
    case .down, .downMirrored:
        transform = transform.translatedBy(x: size.width, y: size.height)
        transform = transform.rotated(by: CGFloat.pi)
    case .left, .leftMirrored:
        transform = transform.translatedBy(x: size.width, y: 0)
        transform = transform.rotated(by: CGFloat.pi / 2.0)
    case .right, .rightMirrored:
        transform = transform.translatedBy(x: 0, y: size.height)
        transform = transform.rotated(by: CGFloat.pi / -2.0)
    case .up, .upMirrored:
        break
    @unknown default:
        fatalError("Missing...")
        break
    }
    
    // Flip image one more time if needed to, this is to prevent flipped image
    switch imageOrientation {
    case .upMirrored, .downMirrored:
        transform = transform.translatedBy(x: size.width, y: 0)
        transform = transform.scaledBy(x: -1, y: 1)
    case .leftMirrored, .rightMirrored:
        transform = transform.translatedBy(x: size.height, y: 0)
        transform = transform.scaledBy(x: -1, y: 1)
    case .up, .down, .left, .right:
        break
    @unknown default:
        fatalError("Missing...")
        break
    }
    
    ctx.concatenate(transform)
    
    switch imageOrientation {
    case .left, .leftMirrored, .right, .rightMirrored:
        ctx.draw(cgImage, in: CGRect(x: 0, y: 0, width: size.height, height: size.width))
    default:
        ctx.draw(cgImage, in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
        break
    }
    
    guard let newCGImage = ctx.makeImage() else { return nil }
    return UIImage.init(cgImage: newCGImage, scale: 1, orientation: .up)
}

}`

[torrao]

@shivamgarg102 @ashwaniInsigma @rameezhandel

I tested taking pictures horizontally and vertically, both with and without device rotation locked and couldn't reproduce it. Do you have more information about this issue?

[ooleynich]

@torrao Run app in portrait orientation, rotate to landscape left, rotate back to portrait, take photo. Your image will be rotated left. Settings: shouldRespondToOrientationChanges = true shouldKeepViewAtOrientationChanges = true

[torrao]

@ooleynich

to help me replicate the issue, can you please provide some info:

• are you running the Example App?
• which version of CameraManager are you using;
• which device and iOS version are you running on;

Thanks

[y25zhao]

Hmm... i am having the same issue. All I did was creating a app with viewcontroller and did folloring

private let cameraMan: CameraManager = CameraManager()

func setup(view: UIView) {
    cameraMan.shouldRespondToOrientationChanges = false
    cameraMan.shouldKeepViewAtOrientationChanges = false
    cameraMan.addPreviewLayerToView(view)
}

And I called setup in viewDidLoad() and passed view from viewcontroller into setup function.

[y25zhao]

On top of this, this issue also happens with example app from this repo. Half of the screen is cut too. I am using my iPad Pro 9 inch and iOS13.4

[Mohit-Allay]

This will fix auto rotate : CameraManager properties:

cameraManager.shouldRespondToOrientationChanges = true   
cameraManager.shouldKeepViewAtOrientationChanges = true

UIImage extension:

extension UIImage {
    func fixOrientation() -> UIImage? {
        guard imageOrientation != .up else {
            return self
        }
        UIGraphicsBeginImageContext(size)
        draw(in: CGRect(origin: .zero, size: size))
        let normalizedImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return normalizedImage
    }
}

Reference : https://stackoverflow.com/a/39595508