How to store object of NSObject Class using File Archiving

Question

I am trying to store an object of NSObject Class using file archiving. When i tried

[NSKeyedArchiver archiveRootObject:myObject toFile:@"filePath"];

and

NSArray *myArray=@[myObject];
[NSKeyedArchiver archiveRootObject:myObject toFile:@"FilePath"];

But both returns warning !!

* Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[ePub encodeWithCoder:]: unrecognized selector sent to instance 0xeac3570'

@CRD I have added the warning – Karan Alangat Jun 10 '14 at 10:50 — Karan Alangat, Jun 10 '14 at 10:50

score 1 · Answer 1 · answered Jun 10 '14 at 11:56

You need to put encodeWithCoder and Decoder in your NSObject :

in your header :

- (void)encodeWithCoder:(NSCoder *)coder;
- (id)initWithCoder:(NSCoder *)coder;

in your .m

- (void)encodeWithCoder:(NSCoder *)coder;
{
    [coder encodeObject:self.yourProperty forKey:@"yourProperty"];
}



- (id)initWithCoder:(NSCoder *)coder;
{
    self = [super init];
    if (self != nil)
    {

        self.yourProperty = [coder decodeObjectForKey:@"yourProperty"];


    }
    return self;
}

you need to do that for all properties.

Note that for other types, like integers and floats, use decodeIntForKey and EncodeInt accordingly.

How to store object of NSObject Class using File Archiving

1 Answers1