How to upload images to azure without losing quality with image data swift

Question

Currently, I am using below to upload an image in Azure blob

  let im:UIImage = catImage[i]
            let imageData = im.pngData()
            blob.upload(from: imageData!, completionHandler:{(NSError) -> Void in
                print( i , "uploaded")

                print(blob.metadata)
                print(i , imageData)
            })

but I am losing image quality because of pngdata(). What else I can use without losing quality.

@Scriptable let imageData = im.pngData() // im is an UIImage — Soma Sharma, Jan 09 '19 at 17:16
it would be much better if you could provide a sample image, or a link to sample image. convert it to data, compare that data size with the result of pngData() in the question. — Scriptable, Jan 09 '19 at 17:38
No, not really. It could be being compressed by the service on Azure that receives the file? (i'm not familiar with Azure blob?) .pngData should return the same quality image — Scriptable, Jan 09 '19 at 17:54
Not sure what your specific issue is, but Azure has nothing to do with compressed data; blobs are just... objects. It knows nothing of your contents, and doesn't alter *any* contents. Your issue is going to be related to the image library / tools you're working with. — David Makogon, Jan 10 '19 at 04:21
@Scriptable - Azure Storage does no such thing. Blobs in Azure Storage are just objects. They are never altered from what is sent to / retrieved from them. — David Makogon, Jan 10 '19 at 04:22
@DavidMakogon I will check once again in my code about the specific issue and will update here — Soma Sharma, Jan 10 '19 at 04:53

score 0 · Answer 1 · answered Jan 10 '19 at 08:56

0

Similar question here: UIImage to raw NSData / avoid compression

Trying to save a UIImage without compression.

answered Jan 10 '19 at 08:56

Dave C

457
3
10

score 0 · Accepted Answer · answered Feb 03 '19 at 06:10

0

It was a problem with my image picker, solved it by picking phasset instead of images directly

answered Feb 03 '19 at 06:10

Soma Sharma

73
15

How to upload images to azure without losing quality with image data swift

2 Answers2