Question

I am working on NSKeyArchive and running into the problem… What I am having so far is

1.-(BOOL)archiveItem
2.{
3.    NSString *path = [self findPath];
4.    if ([NSKeyedArchiver archiveRootObject:items toFile:wishListPath])
5.    {
6.        return YES;
7.    }else{
8.        return NO;
9.    }
10.}
11.-(BOOL)unarchiveItem
12.{
13.    NSString *path = [self findPath];
14.    self.items = [NSKeyedUnarchiver unarchiveObjectWithFile:path];
15.    NSLog(@"Class of items is %@",[self.items class]);
16.    if (self.items == nil)
17.        return NO;
18.    else
19.           return YES;
20.}

In my header file, items is declared like

@property (nonatomic, copy) NSMutableArray *items;

However, line 15 shows that type of items is NSArray ( not NSMutablArray)

Does anyone have an idea about this one,please help. All comments are welcomed.
Thanks

Answer 1

Change this line in your -(BOOL)unarchiveItem

self.items = [NSKeyedUnarchiver unarchiveObjectWithFile:path];

to

self.items = [[[NSKeyedUnarchiver unarchiveObjectWithFile:path] mutableCopy] autorelease];

change your declaration

@property (nonatomic, copy) NSMutableArray *items;

to

@property (nonatomic, retain) NSMutableArray *items;