Save Image with the Correct Orientation - Swift & Core Image

Save image with the correct orientation - Swift & Core Image

Instead of using the metadata version of writeImageToSavedPhotosAlbum, you can use :

library.writeImageToSavedPhotosAlbum(
                cgimg,
                orientation: orientation,
                completionBlock:nil)

then you can pass in the orientation directly.

To satisfy Swift, you may need to typecast it first:

var orientation : ALAssetOrientation = ALAssetOrientation(rawValue:           
                                    gotImage.imageOrientation.rawValue)!

As per my somewhat inconclusive answer here.

(As you have confirmed, this solution does indeed work in Swift - I derived it, untested, from working Objective-C code)

If you are interested in manipulating other information from image metadata, here are a few related answers I provided to other questions...

Updating UIImage orientation metaData?

Force UIImagePickerController to take photo in portrait orientation/dimensions iOS

How to get author of image in cocoa

Getting a URL from (to) a "picked" image, iOS

And a small test project on github that digs out image metadata from various sources (it's objective-C, but the principles are the same).

Swift PNG Image being saved with incorrect orientation

If you need to save your PNG with correct rotation you will need to redraw your image if its orientation it is not .up. You can redraw it as follow:

extension UIImage {
    func png(isOpaque: Bool = true) -> Data? { flattened(isOpaque: isOpaque)?.pngData() }
    func flattened(isOpaque: Bool = true) -> UIImage? {
        if imageOrientation == .up { return self }
        UIGraphicsBeginImageContextWithOptions(size, isOpaque, scale)
        defer { UIGraphicsEndImageContext() }
        draw(in: CGRect(origin: .zero, size: size))
        return UIGraphicsGetImageFromCurrentImageContext()
    }
}

edit/update:

For iOS10+ tvOS10+ you can use UIGraphicsImageRenderer:

extension UIImage {
    func png(isOpaque: Bool = true) -> Data? { flattened(isOpaque: isOpaque).pngData() }
    func flattened(isOpaque: Bool = true) -> UIImage {
        if imageOrientation == .up { return self }
        let format = imageRendererFormat
        format.opaque = isOpaque
        return UIGraphicsImageRenderer(size: size, format: format).image { _ in draw(at: .zero) }
    }
}

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Playground testing:

Usage for images without transparency:

let image = UIImage(data: try! Data(contentsOf: URL(string: "https://i.stack.imgur.com/varL9.jpg")!))!

if let data = image.png() {
    let imageFromPNGData = UIImage(data: data)
}

---

With transparency :

if let data = image.png(isOpaque: false) {
    let imageFromPNGData = UIImage(data: data)
}

Correctly set the right picture orientation when shooting photo

You may set your shot orientation to whatever you like by setting videoOrientation of your AVCapturePhotoOutput.

To match it with the current device orientation, you may use UIDevice.current.orientation manually converted to AVCaptureVideoOrientation.

let photoOutput = AVCapturePhotoOutput()

func takeShot() {

    // set whatever orientation you like
    let myShotOrientation = UIDevice.current.orientation.asCaptureVideoOrientation

    if let photoOutputConnection = self.photoOutput.connection(with: .video) {
        photoOutputConnection.videoOrientation = myShotOrientation
    }

    photoOutput.capturePhoto(...)
}

Conversion from UIDeviceOrientation to AVCaptureVideoOrientation:

extension UIDeviceOrientation {
    
    ///
    var asCaptureVideoOrientation: AVCaptureVideoOrientation {
        switch self {
        // YES, that's not a mistake
        case .landscapeLeft: return .landscapeRight
        case .landscapeRight: return .landscapeLeft
        case .portraitUpsideDown: return .portraitUpsideDown
        default: return .portrait
        }
    }
}

Save UIImage, Load it in Wrong Orientation

I have faced similar problem and here is how I solved it.

While we save image we need to save its orientation information along with the image ...

NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setInteger:[myImage imageOrientation] forKey:@"kImageOrientation"];
[imageOrientation release];

And we load image we need to read its orientation information and apply it to the image…

UIImage *tempImage = [[UIImage alloc] initWithContentsOfFile:fullPath];
UIImage *orientedImage= [[UIImage alloc] initWithCGImage: tempImage.CGImage scale:1.0 orientation:imageOrientation];
[tempImage release];

orientedImage is what we need.

Thanks,

How to save Image in Core Data

Convert UIImage to NSData and save.

To save: let data = UIImagePNGRepresentation(image)

To load: let image = UIImage(data: data)

save a rotated picture (swift3)

Change below line

UIImage(cgImage: (otherImage?.cgImage!)!, scale: CGFloat(1.0), orientation: .right)

to

UIImage(cgImage: (otherImage?.cgImage!)!, scale: CGFloat(1.0), orientation: .up)

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