Question

I’m using

[NSKeyedArchiver archiveRootObject:data toFile:file];

to save NSMutableArray to file. That works fine.

The problem comes when I try to get the array back.

NSMutableArray *s = [NSKeyedUnarchiver unarchiveObjectWithData:file];

Here I get

Incompatible pointer types sending NSString *__strong to parameter of type NSData

What is wrong here ?

Answer 1

You are trying to use unarchiveObjectWithData:, which expects you to pass it the contents of the file. Try using unarchiveObjectWithFile: instead, which expects you to pass it the filename.