How to save content of a file into via defaults in such a way that they are handled as -data type?
Something like (just a naive idea, might not direct to the right approach):
% FILEDATA=... # read abc.xyz into a variable
% defaults write mydomain mykey -data "$FILEDATA" # save into user data
I. e., when I call defaults read on that key I get:
% defaults read mydomain mykey
{length = 400, bytes = 0xdcf2dbbb cb4343d7 ec4324ae 1234de18 ... 289f4567 ec4324ae }
Later in an obj-c app, the data are read using:
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
NSData *data = [userDefaults dataForKey:@"mykey"];
I’m not sure which bit of this is causing you problems so I did an end-to-end test.
When you write a -data value, the defaults command expect hex digits, so you set up FILEDATA like so:
% FILEDATA=`xxd -p test.txt`
The output from the read command is weird because defaults is relying on the description property and that changed a while back. I filed a bug about that at the time (r. 58531869) but it’s not resolved )-:
When I tweaked your app’s code to print the debugDescription property:
NSLog(@"%@", data.debugDescription);
I see the old school NSData format:
2021-11-01 11:52:20.551377+0000 Test693520[13739:1160063] <48656c6c 6f204372 75656c20 576f726c 64210a>
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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