iOS encode/decode custom object

erdinc27 said:

i have a custom object(TheLogo). i want to save an array that includes this objects to plist. so i encode it and write to plist. but when i cant decode it back.
here how my object looks
TheLogo.m

Code:

- (void) encodeWithCoder:(NSCoder *)aCoder
{
    [aCoder encodeObject:self.logoID forKey:@"logoID"];
    [aCoder encodeObject:self.logoTitle forKey:@"logoTitle"];
    [aCoder encodeObject:self.logoThumb forKey:@"logoThumb"];
    [aCoder encodeObject:self.logoResim forKey:@"logoResim"];
    [aCoder encodeObject:self.logoIllustrator forKey:@"logoIllustrator"];
    [aCoder encodeObject:self.logoEPS forKey:@"logoEPS"];
    [aCoder encodeObject:self.logoJPG forKey:@"logoJPG"];
}

- (id)initWithCoder:(NSCoder *)decoder
{
    if (self = [super init])
    {
        self.logoID = [decoder decodeObjectForKey:@"logoID"];
        self.logoTitle = [decoder decodeObjectForKey:@"logoTitle"];
        self.logoThumb = [decoder decodeObjectForKey:@"logoThumb"];
        self.logoResim = [decoder decodeObjectForKey:@"logoResim"];
        self.logoIllustrator = [decoder decodeObjectForKey:@"logoIllustrator"];
        self.logoEPS = [decoder decodeObjectForKey:@"logoEPS"];
        self.logoJPG = [decoder decodeObjectForKey:@"logoJPG"];
    }
    
    return self;
}

and here how i written it to plist.

Code:

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory =  [paths objectAtIndex:0];
    NSString *destPath = [documentsDirectory stringByAppendingPathComponent:@"Favorites.plist"];
    
    NSFileManager *fileManager = [NSFileManager defaultManager];
    
    if ( ![fileManager fileExistsAtPath:destPath] )
    {
        NSString *pathToSettingsInBundle = [[NSBundle mainBundle] pathForResource:@"Favorites" ofType:@"plist"];
        [fileManager copyItemAtPath:pathToSettingsInBundle toPath:destPath error:nil];
    }
    
    
    NSMutableArray *arrLogo = [[NSMutableArray alloc] initWithCapacity:0];
    
    for (int i = 0; i< 10; i++)
    {
        [arrLogo addObject:[arrParamLogos objectAtIndex:i]];
    }
    
    NSMutableData *tmp = [NSMutableData data];
    NSKeyedArchiver *encode = [[NSKeyedArchiver alloc] initForWritingWithMutableData:tmp];
    
    [encode encodeObject:arrLogo forKey:@"logo"];
    [encode finishEncoding];
    
    [tmp writeToFile:destPath atomically:YES];

// here i try to read it back from plist
NSMutableArray *arrNew = [NSKeyedUnarchiver unarchiveObjectWithData:tmp];
    
    NSLog(@"New Array Count %d", [arrNew count]);

but arrNew count is always 0. how i can decode that objects from plist ?

Click to expand...

NSMutableArray *arrNew = [NSKeyedUnarchiver unarchiveObjectWithData:tmp];

NSKeyedUnarchiver *decoder = [[NSKeyedUnarchiver alloc] initForReadingWithData:tmp];
    
NSArray *arrNew = [decoder decodeObjectForKey:@"logo"];

MattInOz said:

If you found the answer you should make as resolved.

One question are you archiving images in to your plist as binary data or are they URL's to the image files?

Even if they are URL's is the only difference in the file name going to be the file type suffix?

Click to expand...