NSFileManager creating folder (Cocoa error 513.)

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I'm trying to create a folder inside the /sounds folder of my app.

-(void)productPurchased:(UAProduct*) product {
    NSLog(@"[StoreFrontDelegate] Purchased: %@ -- %@", product.productIdentifier, product.title);

    NSFileManager *manager = [NSFileManager defaultManager];
    NSString *bundleRoot = [[NSBundle mainBundle] bundlePath];

    NSError *error;

    NSString *dataPath = [NSString stringWithFormat:@"%@/sounds/%@", bundleRoot, product.title];

    if (![manager fileExistsAtPath:dataPath isDirectory:YES]) {
        [manager createDirectoryAtPath:dataPath withIntermediateDirectories:YES attributes:nil error:&error];
        NSLog(@"Creating folder");
    }

    NSLog(@"%@", error);
}

But I get this error:

Error Domain=NSCocoaErrorDomain Code=513 "The operation couldn’t be completed. (Cocoa error 513.)" UserInfo=0x175120 {NSFilePath=/var/mobile/Applications/D83FDFF9-2600-4056-9047-05F82633A2E4/App.app/sounds/Test Tones, NSUnderlyingError=0x117520 "The operation couldn’t be completed. Operation not permitted"}

What am I doing wrong? Thanks.

4 Answers

I'm still not totally clear on the meaning of the 513 error in my case, but I was getting it when just trying to read an opened file URL using [NSFileHandle fileHandleForReadingFromURL:theUrl error:&err ].

I realized from this answer that with iOS 13, I now need to use startAccessingSecurityScopedResource to access external files that are opened in the app. When I wrapped my file calls as follows, then the error 513 stopped occurring:

if( [myURL startAccessingSecurityScopedResource] ) 
{
    NSFileHandle* myFile = [NSFileHandle fileHandleForReadingFromURL:myURL error:&err ];
    // ...Do file reads here...
    [theUrl stopAccessingSecurityScopedResource];
}
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