I’m not sure what I am doing wrong but, the NSMutableDictionary I created won’t write to file. When I tried wrote the description to file using NSString, it seemed to work though.

• (void)saveToFile: (NSString *)fileName { NSLog(@”%@”, [profileList description]); // This Shows Up Fine profileList description] writeToFile:@”List.xml” atomically:YES]; // This saves fine [[[[NSDictionary dictionaryWithDictionary:profileList] writeToFile:fileName atomically:YES]; // This just doesn’t work! }

Can anyone give me some ideas?

Thanks

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If your dictionary contains objects that aren’t standard property list items (NSNumber, NSString, NSDictionary, NSArray, NSData, NSDate) then it won’t write out to file. The proper way to write a dictionary is:

[profileList writeToFile:fileName atomically:YES];

but only if you don’t have any custom classes or stuff in there…

If you have custom classes, then you can write them to a file by making them all conform to NSCoding, and then using NSKeyedArchiver to transform them to NSData.

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Your code works just fine. I suggest you look at permissions for the file you are trying to create - check the path and make sure the user running the application has the write to create the file.

FYI, here’s the test code:

#import <Cocoa/Cocoa.h> @interface MyObject: NSObject @end

@implementation MyObject

• (void)saveToFile: (NSString *)fileName { NSDictionary * profileList = [NSDictionary dictionaryWithObjectsAndKeys:@”Test string”, @”test”, nil]; NSLog(@”%@”, [profileList description]); // This Shows Up Fine profileList description] writeToFile:@”List.xml” atomically:YES]; // This saves fine [[[[NSDictionary dictionaryWithDictionary:profileList] writeToFile:fileName atomically:YES]; // This just doesn’t work! } @end

int main() { MyObject * myObject = [[MyObject alloc] init]; [myObject saveToFile:@”list2.xml”]; }

BR, Cristi

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Please see HowToAskQuestions … “doesn’t work” is rather useless. What exactly happens. What error(s) are you receiving?

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I’m having the same problem. Using Cristi’s test function, profileList description] writeToFile:atomically:] succeeds but [[[NSDictionary writeToFile:atomically:] returns false and does not create the file. There is no permissions problem (both the working and non-working calls were writing to the same directory (/tmp), neither file existed beforehand, and there is ample free space on disk). dtruss shows this:

lstat64(“myfilename\0”, 0x7FFF5FBFC5B0, 0x7FFF70534630) = -1 Err#2

and nothing more. I tried using a .xml suffix for the filename, and that didn’t help either. errno is “Operation timed out”, which I suspect is irrelevant. This is on OS 10.6.4.