SwiftUI: UIActivityViewController share JPEG data from UIImage

Question

tmsm1999 OP

Created Oct ’20

Replies 1

Boosts 0

Views 2.2k

Participants 1

Hello everybody,

I am currently implementing the sharing capability of my application. I want to share an image in JPEG format with text.

The problem is that when I use image.jpegData(compressionQuality: 0.8) and I try to post it on Twitter the popup does not show up. This does not happens when converting to pngData. I find this odd and I don’t know if this has happened to any of you but I an error about dismissing the view.

Here is my UIActivityViewController:

Code Block import SwiftUI
struct ShareSheet: UIViewControllerRepresentable {
    
    var items: [Any]
    
    func makeUIViewController(context: UIViewControllerRepresentableContext<ShareSheet>) -> UIActivityViewController {
        
        let controller = UIActivityViewController(activityItems: items, applicationActivities: nil)
        return controller
    }
    
    func updateUIViewController(_ uiViewController: UIActivityViewController, context: UIViewControllerRepresentableContext<ShareSheet>) {}
}

I am creating my items array like this:

Code Block func getItemShareSheet() -> [Any] {
        
        let species = observation.speciesName
        let image = observation.image.pngData()
        let date = observation.date
        
        var finalText: String = ""
        
        if let location = observation.location {
            
            let latitude = String(format: "%.1f", Double(location.coordinate.latitude))
            let longitude = String(format: "%.1f", Double(location.coordinate.longitude))
            
            finalText = "New observation - \(date)\nSpecies: \(species)\nLatitude: \(latitude)\nLongitude: \(longitude)"
        }
        else {
            finalText = "New observation - \(date)\nSpecies: \(species)\n"
        }
        
        let items: [Any] = [image!, finalText]
        return items
    }

Has this happen to any of you?

Thank you!

Answered by tmsm1999 in 638488022

Hello everybody,

This is the solution I found:

The best way is to resize the image bellow 90%. Here is the code I used. I found it on StackOverflow.

Code Block extension UIImage {
    func resized(withPercentage percentage: CGFloat, isOpaque: Bool = true) -> UIImage? {
        let canvas = CGSize(width: size.width * percentage, height: size.height * percentage)
        let format = imageRendererFormat
        format.opaque = isOpaque
        return UIGraphicsImageRenderer(size: canvas, format: format).image {
            _ in draw(in: CGRect(origin: .zero, size: canvas))
        }
    }
    func resized(toWidth width: CGFloat, isOpaque: Bool = true) -> UIImage? {
        let canvas = CGSize(width: width, height: CGFloat(ceil(width/size.width * size.height)))
        let format = imageRendererFormat
        format.opaque = isOpaque
        return UIGraphicsImageRenderer(size: canvas, format: format).image {
            _ in draw(in: CGRect(origin: .zero, size: canvas))
        }
    }
}

Boost

Answer 1

tmsm1999 OP

Oct ’20

Accepted Answer

Hello everybody,

This is the solution I found:

The best way is to resize the image bellow 90%. Here is the code I used. I found it on StackOverflow.

Code Block extension UIImage {
    func resized(withPercentage percentage: CGFloat, isOpaque: Bool = true) -> UIImage? {
        let canvas = CGSize(width: size.width * percentage, height: size.height * percentage)
        let format = imageRendererFormat
        format.opaque = isOpaque
        return UIGraphicsImageRenderer(size: canvas, format: format).image {
            _ in draw(in: CGRect(origin: .zero, size: canvas))
        }
    }
    func resized(toWidth width: CGFloat, isOpaque: Bool = true) -> UIImage? {
        let canvas = CGSize(width: width, height: CGFloat(ceil(width/size.width * size.height)))
        let format = imageRendererFormat
        format.opaque = isOpaque
        return UIGraphicsImageRenderer(size: canvas, format: format).image {
            _ in draw(in: CGRect(origin: .zero, size: canvas))
        }
    }
}

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