How to set image convert from base64 string width and height? - ios

Question

I have a question about UIImage convert to base64 String.
And I already resize my image width and height (1024 x 768).
Then I convert this image to base64 String.
But when I use this base64 String to UIImage and look image width and height not I resize before(2304.0 x 3072.0).
How to make my base64 String image size correctly?
guard let image = image else { return }
print("image => \(image)")
//image => <UIImage:0x283cce7f0 anonymous {768, 1024}>
guard let base64ImageString = image.toBase64(format: .jpeg(0.2)) else { return }
let dataDecoded : Data = Data(base64Encoded: base64ImageString, options: .ignoreUnknownCharacters)!
let decodedimage = UIImage(data: dataDecoded)
let height = decodedimage?.size.height
let width = decodedimage?.size.width
print("====) \(String(describing: width)) / \(String(describing: height))")
//====) Optional(2304.0) / Optional(3072.0)
public enum ImageFormat {
case png
case jpeg(CGFloat)
}
extension UIImage {
public func toBase64(format: ImageFormat) -> String? {
var imageData: Data?
switch format {
case .png:
imageData = self.pngData()
case .jpeg(let compression):
imageData = self.jpegData(compressionQuality: compression)
}
return imageData?.base64EncodedString()
}
}

Answer 1

Try this way, the below code resizes your image, and should be added before you change it to base64.
guard let image = image else { return }
print("image => \(image)")
//image => <UIImage:0x283cce7f0 anonymous {768, 1024}>
let desiredSize = CGSize(width: 768, height: 1024)
UIGraphicsBeginImageContextWithOptions(desiredSize, false, 1.0)
image.draw(in: CGRect(origin: CGPoint.zero, size: CGSize(width:
desiredSize.width, height: desiredSize.height)))
let resizedImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
guard let base64ImageString = resizedImage.toBase64(format: .jpeg(0.2)) else { return }