How to write raw bytes to an NSMutableData object?

Question

Ok, I'm a little stumped here, as I've never really dealt with anything this low level. Say I want to add the following bytes to an NSMutableData object:

0x01, 0xF, 0x64, 0x0, 0x6A

How do I even go about doing this? I imagine it's something to do with the appendBytes:length: method, but I honestly don't know how to transform what I have above into an NSMutableData.

Any help would be greatly appreciated!

Maybe http://stackoverflow.com/questions/2338975/convert-hex-data-string-to-nsdata-in-objective-c-cocoa and http://stackoverflow.com/questions/4917968/best-way-to-generate-nsdata-object-with-random-bytes-of-a-specific-length can help you... — Pooria Azimi, Mar 14 '12 at 16:08

score 23 · Accepted Answer · answered Mar 14 '12 at 16:07

23

This should do it:

NSMutableData *data = [NSMutableData data];
char bytesToAppend[5] = {0x01, 0xf0, 0x64, 0x0, 0x6a};
[data appendBytes:bytesToAppend length:sizeof(bytesToAppend)];

answered Mar 14 '12 at 16:07

Andrew Madsen

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How to write raw bytes to an NSMutableData object?

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