從其他數組向NSArray添加項目的問題

Question

我正在嘗試將Instagram圖片添加到與Twitter Tweets相同的數組中，但是當我加載該應用程序時，這些Tweets僅在第8行之后顯示。

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{

    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return totalFeed.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.row % 2 == 0)  {
        NSDictionary *tweet = [tweets objectAtIndex:indexPath.row];
        NSString *created = [tweet objectForKey:@"created_at"];
        NSLog(@"%@", created);
        static NSString *CellIdentifier = @"TweetCell";

        UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];
        if (cell == nil) {
            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
        }

        NSString *text = [tweet objectForKey:@"text"];
        NSString *name = [[tweet objectForKey:@"user"] objectForKey:@"name"];



        cell.textLabel.text = text;
        cell.detailTextLabel.text = [NSString stringWithFormat:@"by %@", name];
        return cell;
        if (name == NULL) {
            NSLog(@"Tweet Doesent Exist");
        }
    }else {
        static NSString *CellIdentifier = @"InstagramCell";
        UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];


        NSDictionary *entry = instaPics[indexPath.row];
        NSString *imageUrlString = entry[@"images"][@"low_resolution"][@"url"];
        NSURL *url = [NSURL URLWithString:imageUrlString];
        [cell.imageView setImageWithURL:url];
        return cell;
    }

}


- (void)fetchTweets {
    self.twitterClient = [[AFOAuth1Client alloc] initWithBaseURL:[NSURL URLWithString:@"https://api.twitter.com/1.1/"] key:@"4oFCF0AjP4PQDUaCh5RQ" secret:@"NxAihESVsdUXSUxtHrml2VBHA0xKofYKmmGS01KaSs"];

    [self.twitterClient authorizeUsingOAuthWithRequestTokenPath:@"/oauth/request_token" userAuthorizationPath:@"/oauth/authorize" callbackURL:[NSURL URLWithString:@"floadt://success"] accessTokenPath:@"/oauth/access_token" accessMethod:@"POST" scope:nil success:^(AFOAuth1Token *accessToken, id responseObject) {
        [self.twitterClient registerHTTPOperationClass:[AFJSONRequestOperation class]];
        [self.twitterClient getPath:@"statuses/home_timeline.json" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
            NSArray *responseArray = (NSArray *)responseObject;
            [responseArray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
                NSLog(@"Success: %@", obj);
                tweets = responseArray;
                [self updateArrays];
                [self.tableView reloadData];
            }];
        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
            NSLog(@"Error: %@", error);
        }];
    } failure:^(NSError *error) {
        NSLog(@"Error: %@", error);
    }];

    //[[TwitterClient sharedClient] getTimeline];
}

- (void)fetchInstagramPics {
    NSUserDefaults *user = [NSUserDefaults standardUserDefaults];
    BOOL *status = [user boolForKey:@"isInstagramLoggedIn"];
    if (status) {
        [[InstagramClient sharedClient] getPath:@"users/self/feed"
                                     parameters:nil
                                        success:^(AFHTTPRequestOperation *operation, id responseObject) {
                                            // NSLog(@"Response: %@", responseObject);
                                            self.timelineResponse = responseObject;
                                            [self updateArrays];
                                            [self.tableView reloadData];
                                        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                            NSLog(@"Failure: %@", error);
                                        }];
    }


}

- (void)updateArrays {
    instaPics = self.timelineResponse[@"data"];
    totalFeed = [instaPics arrayByAddingObjectsFromArray:tweets];
    instaPics = [totalFeed mutableCopy];
    tweets = [totalFeed mutableCopy];
}

- (void)fetchTimeline {
    [self fetchInstagramPics];
    [self fetchTweets];
    [self updateArrays];
    [self.tableView reloadData];
}

問題在於帖子比它們應該在indexpath.row中的位置indexpath.row

Answer 1

我認為在主隊列上重新加載數據可以解決此問題。

在fetchInstagramPics和fetchTweets方法中都嘗試此操作：

dispatch_async（dispatch_get_main_queue（），^ {
[self.tableView reloadData]; }）;

讓我知道它是否有效。

Answer 2

我不知道您到底想實現什么目標，但看來您形成陣列的方式不太正確。

- (void)updateArrays {

    totalFeed = [instaPics arrayByAddingObjectsFromArray:tweets]; // concatinates two arrays.
    // NLog your total feed and see the behaviour 
    instaPics = [totalFeed mutableCopy];
    tweets = [totalFeed mutableCopy];
}

如果您想在備用單元格中獲得推​​文和Instagram，如我在圖片中所附加的，那就不要用totalFeed總結instaPics和推文。 獨立使用它們。

- (void)updateArrays {

    totalFeed = [instaPics arrayByAddingObjectsFromArray:tweets]; // concatinates two arrays.

// rmeove this

//    instaPics = [totalFeed mutableCopy];
//    tweets = [totalFeed mutableCopy];
}

您的總供稿包含推文和instagram圖片的備用數據結構。 和instaPics＆tweets數組是該數組的冗余副本。

如果要將它們保留在同一單元格中，則創建一個單元格並使用不帶％2條件的totalFeed數組。