Transform Uiimage into Byte Array

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Transform Uiimage into Byte Array

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I need to transform an image into an array of bytes, as I do to transform this image into an Array Bytes?

Question: Do you want an array of bytes that represents a JPEG or PNG file, as the @carlosfigueira answer illustrated, or do you want an array of bytes with the framebuffer of the image itself? If his answer is correct, it would be nice to mention this in the question.

– epx

2020/02/28 at 19:09

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by carlosfigueira • **7,785** points · Answer 1 · 2014-10-23T13:45:10+00:00

You can use the functions Uiimagejpegrepresentation or Uiimagepngrepresentation to cover your image in a NSData. From there you can allocate an array of bytes the size of the data, and copy the bytes to it, as in the example below.

UIImage *image = [UImage imageNamed:@"foto.png"];
NSData *data = UIImagePNGRepresentation(image);
NSUInteger len = [data length];
Byte *bytes = (Byte*)malloc(len);
memcpy(bytes, [data bytes], len);