CODEWITHSUNDEEP
iphoneobjective-cxcode
user306766
user306766

Reputation:

Array of Arrays - writing to File problem

and again my array of arrays ... I try to improve my app performance by buffering arrays on file for later reuse.

I have an NSMutableArray that contains about 30 NSMutableArrays with NSNumber, NSDate and NSString Objects.

I try to write the file using this call:

bool result = [myArray writeToFile:[fileMethods 
                                    getFullPath:[NSString 
                                                 stringWithFormat:@"iEts%@.arr", 
                                                 [aDate shortDateString]]] 
                       atomically:NO];

=> result = FALSE.

The Path method is:

+ (NSString *) getFullPath:(NSString *)forFileName {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    return [documentsDirectory stringByAppendingPathComponent:forFileName];
}

and the aDate call returns a shortDateString with ddMMyy.

The NSLog 

NSLog(@"%@", [fileMethods getFullPath:[NSString stringWithFormat:@"iEts%@.arr", 
                                                [aDate shortDateString]]]);

on the path generation returns:

/Users/me/Library/Application Support/iPhone Simulator/User/Applications/86729620-EC1D-4C10-A799-0C638BB27933/Documents/iEts010510.arr

FURTHER:

Any ideas what could cause the trouble?

Upvotes: 0

Views: 383

Answers (2)

JeremyP
JeremyP

Reputation: 86651

Have you got any NSNulls in your arrays anywhere? I don't think they count as plist objects and so would cause the write to fail.

Upvotes: 0

Eimantas
Eimantas

Reputation: 49344

AFAIK the write to file uses object archiving hence some objects in your array of arrays can't be archived.

Upvotes: 1

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