how to convert NSData to image in ios

Question

I'm using web service to retrieve data. But I'm unable to convert data to image. I'm receiving data from server but when I'm converting to image it is showing null.

this must be covered somewhere on this site – Grady Player Sep 29 '13 at 14:05 — Grady Player, Sep 29 '13 at 14:05
Show us what you've tried. – Hot Licks Sep 29 '13 at 14:05 — Hot Licks, Sep 29 '13 at 14:05
Show code what you have tried? – Jayprakash Dubey Jan 30 '14 at 06:42 — Jayprakash Dubey, Jan 30 '14 at 06:42

Jordan Montel · Answer 1 · 2013-09-29T17:28:11.240

19

Convert NSData to UIImage :

NSData *data = ... // data that you received
UIImage *image = [UIImage imageWithData:data];

Convert UIImage to NSData (png) :

UIImage *image = [UIImage imageNamed:@"imageName.png"];
NSData *imageData = UIImagePNGRepresentation(image);

Convert UIImage to NSData (jpg) :

UIImage *image = [UIImage imageNamed:@"imageName.jpg"];
NSData *imageData = UIImageJPEGRepresentation(image, 1.0);

edited Sep 29 '13 at 17:28

answered Sep 29 '13 at 13:30

Jordan Montel

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i'm using saop service to retrieve data.during xml parsing they are stored in string to get the image i'm converting it to nsdata and from nsdata i want uiiimage here im getting the problem – Balakishore Sep 29 '13 at 13:39
yes so replace YOUR_DATA by your NSData – Jordan Montel Sep 29 '13 at 13:41

score 3 · Answer 2 · answered Sep 29 '13 at 13:30

3

UIImage *image = [UIImage imageWithData:data];

answered Sep 29 '13 at 13:30

iiFreeman

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score 1 · Answer 3 · answered Sep 29 '13 at 13:29

1

Check out UIImage *image = [UIImage imageWithData:...];. I'm curious what are you using now?

answered Sep 29 '13 at 13:29

mmackh

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score 1 · Answer 4 · edited May 23 '17 at 12:09

In one of your comments, you suggest that the images "are stored in string". If this is the case, then image may have been base64-encoded (a common mechanism for representing binary data in a string). You should clarify this with the provider of this SOAP service.

If it has been converted to a base64 string, then you'll have to convert that back to the raw binary format before you can use imageWithData or the like. There are a variety of base64 alternatives listed in response to How do I do base64 encoding on iphone-sdk?

how to convert NSData to image in ios

4 Answers4