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    <p>You first have to parse the JSON, then take the binary part, into NSData. UIImage has a method to do change NSData into image</p> <pre><code>UIImage *myimage = [UIImage imageWithData:mydata]; </code></pre> <p>Update : (hope no one minds) After making myself such a demo, NSJSONSerialization always returns strings, and after having a small back and forth conversation below. I tried to send an image as a Base64 coded string and read back in as data using base64 decode. This works as a charm.</p> <p>This is the code I use (since this works on all iOS versions, from 3.0 and up) :</p> <p>NSData+PHBase64.h</p> <pre><code>@interface NSData (PHBase64) + (id)dataWithBase64EncodedString:(NSString *)string; // Padding '=' characters are optional. Whitespace is ignored. - (NSString *)base64Encoding; @end </code></pre> <p>NSData+PHBase64.m</p> <pre><code>#import "NSData+Base64.h" static const char encodingTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; @implementation NSData (PHBase64) + (id)dataWithBase64EncodedString:(NSString *)string; { if (string == nil) [NSException raise:NSInvalidArgumentException format:nil]; if ([string length] == 0) return [NSData data]; static char *decodingTable = NULL; if (decodingTable == NULL) { decodingTable = malloc(256); if (decodingTable == NULL) return nil; memset(decodingTable, CHAR_MAX, 256); NSUInteger i; for (i = 0; i &lt; 64; i++) decodingTable[(short)encodingTable[i]] = i; } const char *characters = [string cStringUsingEncoding:NSASCIIStringEncoding]; if (characters == NULL) // Not an ASCII string! return nil; char *bytes = malloc((([string length] + 3) / 4) * 3); if (bytes == NULL) return nil; NSUInteger length = 0; NSUInteger i = 0; while (YES) { char buffer[4]; short bufferLength; for (bufferLength = 0; bufferLength &lt; 4; i++) { if (characters[i] == '\0') break; if (isspace(characters[i]) || characters[i] == '=') continue; buffer[bufferLength] = decodingTable[(short)characters[i]]; if (buffer[bufferLength++] == CHAR_MAX) // Illegal character! { free(bytes); return nil; } } if (bufferLength == 0) break; if (bufferLength == 1) // At least two characters are needed to produce one byte! { free(bytes); return nil; } // Decode the characters in the buffer to bytes. bytes[length++] = (buffer[0] &lt;&lt; 2) | (buffer[1] &gt;&gt; 4); if (bufferLength &gt; 2) bytes[length++] = (buffer[1] &lt;&lt; 4) | (buffer[2] &gt;&gt; 2); if (bufferLength &gt; 3) bytes[length++] = (buffer[2] &lt;&lt; 6) | buffer[3]; } realloc(bytes, length); return [NSData dataWithBytesNoCopy:bytes length:length]; } - (NSString *)base64Encoding; { if ([self length] == 0) return @""; char *characters = malloc((([self length] + 2) / 3) * 4); if (characters == NULL) return nil; NSUInteger length = 0; NSUInteger i = 0; while (i &lt; [self length]) { char buffer[3] = {0,0,0}; short bufferLength = 0; while (bufferLength &lt; 3 &amp;&amp; i &lt; [self length]) buffer[bufferLength++] = ((char *)[self bytes])[i++]; // Encode the bytes in the buffer to four characters, including padding "=" characters if necessary. characters[length++] = encodingTable[(buffer[0] &amp; 0xFC) &gt;&gt; 2]; characters[length++] = encodingTable[((buffer[0] &amp; 0x03) &lt;&lt; 4) | ((buffer[1] &amp; 0xF0) &gt;&gt; 4)]; if (bufferLength &gt; 1) characters[length++] = encodingTable[((buffer[1] &amp; 0x0F) &lt;&lt; 2) | ((buffer[2] &amp; 0xC0) &gt;&gt; 6)]; else characters[length++] = '='; if (bufferLength &gt; 2) characters[length++] = encodingTable[buffer[2] &amp; 0x3F]; else characters[length++] = '='; } return [[NSString alloc] initWithBytesNoCopy:characters length:length encoding:NSASCIIStringEncoding freeWhenDone:YES]; } @end </code></pre>
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    1. POImage in JSON iOS
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    1. USTrausti Thor
    1. USTrausti Thor
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    1. COThe problem is the part where the data is, is only an __NSCFArray. I get the rest of my data without problems of it but I dont know how I can turn the array into an nsdata.
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    2. COIf you could show your json structure, it would help. But you can always just typecast, NSData *mydata = [[myjson valueForKey:@"image"] data];
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      1. USTrausti Thor
    3. COThe example is in my edit. When I try to cast to NSData I get -[__NSCFArray data]: unrecognized selector sent to instance
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      1. USSebastian
 

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