NSKeyedUnarchiver简单的数据存储

- (void)saveClassData:(NSMutableArray *)array
{
    if ([array count] > 0) {
        NSMutableArray * classArray = nil;
        //获取分类的沙盒文件路径
        NSArray* myPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString* myDocPath = [myPaths objectAtIndex:0];
        NSString* path = [myDocPath stringByAppendingPathComponent:@“info.plist”];
        //解归档该路径下的文件
        classArray = [NSKeyedUnarchiver unarchiveObjectWithFile:path];

        if (classArray == nil) {
            classArray = [[[NSMutableArray alloc] init] autorelease];
        }
                
        [classArray removeAllObjects];
        [classArray addObjectsFromArray:array];
//            PPRSLog(@"归档前classArray : %@", classArray);
        //将数据归档,若是前面的文件不存在，就会在归档数据时建立
        [NSKeyedArchiver archiveRootObject:classArray toFile:path];

    };
}