学步园

NSString *homePath = NSHomeDirectory();
        NSString *filePath = [homePath stringByAppendingPathComponent:@"array.archiver"];
   
        NSMutableData *mutableData = [NSMutableData data];
        NSKeyedArchiver *archive = [[NSKeyedArchiver alloc] initForWritingWithMutableData:mutableData];
        [archive encodeObject:@"jack" forKey:@"name"];
        [archive encodeInt:21 forKey:@"age"];
        [archive finishEncoding];
        [mutableData writeToFile:filePath atomically:YES];
         
        //------解归档------
        NSData *contentData = [NSData dataWithContentsOfFile:filePath];
         
        NSKeyedUnarchiver *unchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:contentData];
        NSString *nameString = [unchiver decodeObjectForKey:@"name"];
        int age = [unchiver decodeIntForKey:@"age"];
        NSLog(@"nameString : %@",nameString);
        NSLog(@"age : %d",age);
         

 序列化与反序列化的对象必须支持NSCoding协议，自定义的对象需要自己实现NSCoding协议