Converting UIImage to PNG delay

Question

Is there a faster way to convert a UIImage into NSData than NSData* imageData = UIImagePNGRepresentation (image1 );

It will depend on the usage scenario and the source of image. Please provide more details. — proxi, Apr 19 '14 at 20:33
See http://stackoverflow.com/questions/6476929/convert-uiimage-to-nsdata?rq=1 — rmaddy, Apr 19 '14 at 20:49

score 1 · Accepted Answer · answered Apr 20 '14 at 01:37

This is a common problem when using UIImagePickerController. That specific conversion is the bottleneck of any app trying to use that method. Using UIImageJPEGRepresentation(Image, 0.1), (the 0.1 is the level of compression, this can be any value from 1.0 to 0.1 given the level of quality you wish to keep) is the best thing you can use because is much much faster. Hope it helps!

Please note this is a generalised answer, if you could elaborate more on what are you doing I might be able to provide helpful code.

score 0 · Answer 2 · answered Apr 20 '14 at 02:05

0

Try executing this on a background thread, so although it will take the same time, it may not appear so to the user

answered Apr 20 '14 at 02:05

anotherDeveloper

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Converting UIImage to PNG delay

2 Answers2