objective-c - これらのメソッドを独自のクラスに移動するにはどうすればよいですか?

Question

私は目的の c に不慣れで、目的指向のアイデア全体を理解しようとしています。私のアプリには、すべてのページで使用されるチェック マーク (like) ボタンがあるため、すべてのビューにチェック マーク メソッドを配置する代わりに、それらを独自のクラスに移動して呼び出したいと考えています。どうすればいいですか？

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{
    ...

    //create check mark button
    UIButton *checkButton = [[UIButton alloc] initWithFrame:CGRectMake(270, 0, 50, 90)];
    //user has already check marked post
    if ([checkActivityArray containsObject:[object objectId]]){
        [checkButton setTitleColor: [UIColor blueColor] forState:UIControlStateNormal];
        [checkButton addTarget:self action:@selector(minusCheckMark:) forControlEvents:UIControlEventTouchUpInside];
    }
    //user has NOT already check marked post
    else{
        [checkButton setTitleColor: [UIColor grayColor] forState:UIControlStateNormal];
        [checkButton addTarget:self action:@selector(addCheckMark:) forControlEvents:UIControlEventTouchUpInside];
    }
    [checkButton setTitle:@"CH" forState:UIControlStateNormal];
    [checkButton setTag:indexPath.row];
    [cell.contentView addSubview:checkButton];

    ...

    return cell;
}



 - (void)addCheckMark:(UIButton*)button{

    [button setTitleColor: [UIColor blueColor] forState:UIControlStateNormal];

    PFObject *place = [placesArray objectAtIndex:[button tag]];
    PFObject *checkActivity = [PFObject objectWithClassName:@"activity"];
    [checkActivity setObject:place forKey:@"place"];
    [checkActivity setObject:@"checkMark" forKey:@"type"];
    [checkActivity setObject:[PFUser currentUser] forKey:@"fromUser"];
    [checkActivity setObject:[place objectForKey:@"user"] forKey:@"toUser"];
    [checkActivity saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
        if (!error){
            NSLog(@"Check marked post");

            //add post to checkActivity array
            [checkActivityArray addObject:[place objectId]];
            [checkActivityArray writeToFile:checkMarkArrayFileName atomically:YES];


            //increase check mark count
            PFObject *checkCount = [placesArray objectAtIndex:[button tag]];
            [checkCount incrementKey:@"checkMarkCount"];
            [checkCount saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
                if (!error)
                    [self.tableView reloadRowsAtIndexPaths: [NSArray arrayWithObject:[NSIndexPath indexPathForRow: [button tag] inSection:0]] withRowAnimation:NO];
            }];
        }
        else
            NSLog(@"%@", error);
    }];
}


    - (void)minusCheckMark:(UIButton*)button{

    [button setTitleColor: [UIColor grayColor] forState:UIControlStateNormal];

    PFObject *place = [placesArray objectAtIndex:[button tag]];
    PFQuery *queryCheckActivity = [PFQuery queryWithClassName:@"activity"];
    [queryCheckActivity whereKey:@"place" equalTo:place];
    [queryCheckActivity whereKey:@"type" equalTo:@"checkMark"];
    [queryCheckActivity whereKey:@"fromUser" equalTo:[PFUser currentUser]];
    [queryCheckActivity findObjectsInBackgroundWithBlock:^(NSArray *activities, NSError *error) {
        if (!error) {
            for (PFObject *activity in activities) {
                [activity delete];
            }

            //pemove post from checkActivity array
            [checkActivityArray removeObject:[place objectId]];
            [checkActivityArray writeToFile:checkMarkArrayFileName atomically:YES];

            //decrease check mark count
            PFObject *checkCount = [placesArray objectAtIndex:[button tag]];
            [checkCount incrementKey:@"checkMarkCount" byAmount:[NSNumber numberWithInt:-1]];
            [checkCount saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
                if (!error)
                    [self.tableView reloadRowsAtIndexPaths: [NSArray arrayWithObject:[NSIndexPath indexPathForRow: [button tag] inSection:0]] withRowAnimation:NO];
            }];
        }
        else
            NSLog(@"%@", error);
    }];
}