objective c - Archiving object to a read-only file -


i have app saving objects .sav files using nskeyedarchiver archiverootobject: tofile:; however, realized if user open 1 of .sav files in textedit , change @ all, app fail unarchive objects next time opens, , stop working.

is there way can archive root objects read-only file or otherwise stop users editing them? they're buried in application support, not super accessible, i'd play safe.

i don't think there way avoid potentially losing saved state (in end user delete file), if worried user manipulating data, should look @ nssecurecoding.

i believe way avoid unarchiving "corrupt" data , guaranteeing integrity, have not explored topic further can't sure whether allow scenario in contents of specific fields changed (i.e object type same, value different).

in conclusion, think better/safer build system idea of trying circumvent security in mind , instead of trying stop user manipulating/deleting data, making sure invalid data not loaded in. example in case of invalid/corrupt/missing data reverting default values (i.e if app launching first time).


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