writeToFile not working with NSDictionary

Question

I looked around other similar questions about this but nothing really worked.

I managed to write only one pair (object / key) of the dictionary (e.g.: setObject:itemProperties[0] forKey[0]) on my Plist. But I would like all the objets and keys to be added. I didn't managed so far (return the error). Any help?

 // Path to Documents Folder

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"items.plist"];
NSFileManager *fileManager = [NSFileManager defaultManager];

if (![fileManager fileExistsAtPath: path])
{
    path = [documentsDirectory stringByAppendingPathComponent: [NSString stringWithFormat: @"items.plist"] ];
}

NSMutableDictionary *items;

if ([fileManager fileExistsAtPath: path])
{
    items = [[NSMutableDictionary alloc] initWithContentsOfFile: path];
}
else
{
    // If the file doesn’t exist, create an empty dictionary
    items = [[NSMutableDictionary alloc] initWithCapacity:5];
}

// array of the item properties
NSArray *itemProperties = @[myItem.itemTitle, myItem.itemImage, myItem.itemPositionX, myItem.itemPositionY, myItem.itemHeight, myItem.itemWidth];

// Set the key values for each field    
NSArray *keys = @[@"Title", @"Image", @"PositionX", @"PositionY", @"Height", @"Width"];


[items setObject:itemProperties forKey:keys];

//Save dictionnary to Plist
[items writeToFile: path atomically:YES];

if (![items writeToFile:path atomically:YES]) {
    NSLog(@"Error with creating Plist");
}

Answer 1

Have you properly use valid keys & values ?

This method recursively validates that all the contained objects are property list objects (instances of NSData, NSDate, NSNumber, NSString, NSArray, or NSDictionary) before writing out the file, and returns NO if all the objects are not property list objects, since the resultant file would not be a valid property list.

Reference : writeToFile:atomically: