Sharing a plist file using iCloud

Question

I have a relativley simple app which persists data to a plist file located in the documents folder. The data loads into a UITableView at startup. The user can then edit, delete

Answer 1

To use a plist with UIDocument, you can subclass UIDocument and override the following 2 methods with self.myDictionary (your plist) declared as a NSMutableDictionary.

- (BOOL)loadFromContents:(id)contents ofType:(NSString *)typeName error:(NSError **)outError
{    
    if ([contents length] > 0) 
    {
        NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:(NSData *)contents];
        NSMutableDictionary *dataDictionary = [unarchiver decodeObjectForKey:@"data"];

        self.myDictionary = dataDictionary;
        [unarchiver finishDecoding];
        [unarchiver release];
    } 
    else 
    {
        self.myDictionary =  [NSMutableDictionary dictionary];
    }

    return YES;    
}

- (id)contentsForType:(NSString *)typeName error:(NSError **)outError 
{
    NSMutableData *data = [[[NSMutableData alloc] init] autorelease];
    NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
    if( !self.myDictionary )
    {
        self.myDictionary = [NSMutableDictionary dictionary];
    }
    [archiver encodeObject:self.myDictionary forKey:@"data"];

    [archiver finishEncoding];
    [archiver release];
    return data;
}