Question

I’m trying to save a huge NSArray to a file and then retrieve it…

NSURL *documentsDirectory = 
[[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory 
                            inDomains:NSUserDomainMask] lastObject];
NSURL *fileURL = [documentsDirectory 
                  URLByAppendingPathComponent:@"scorecards.dgs"];


NSMutableArray *savedArrayOfScorecards = [NSMutableArray arrayWithContentsOfURL:fileURL];
[savedArrayOfScorecards addObject:currentScoreCard];

[savedArrayOfScorecards writeToURL:fileURL atomically:YES];

NSMutableArray *mynewArray = [NSMutableArray arrayWithContentsOfURL:fileURL];

NSLog(@"%@, %@",[[mynewArray objectAtIndex:0] objectForKey:@"info"], course);

The NSLog comes back with…

(null), BridgeMill

Which BridgeMill should be returned on both sides of the comma. But array won’t save…

Answer 1

Check if it’s being saved correctly:

if([savedArrayOfScorecards writeToURL:fileURL atomically:YES])
{
    NSLog(@"Was saved");
}
else
{
    NSLog(@"Houston we have a problem...");
}

On the documentation:

– (BOOL)writeToURL:(NSURL *)aURL atomically:(BOOL)atomically

You can also use this to check what is going on:

– (BOOL)writeToURL:(NSURL )aURL options:(NSDataWritingOptions)mask error:(NSError *)errorPtr