数组未显示在表视图中

Question

谁能告诉我为什么我的代码没有在我的表格视图中显示任何结果。这是我的代码。我已经尝试将 @"@" 更改为 indexPath.row 没有任何运气。我正在寻找正确方向的任何答案。我对xcode和objective-c还很陌生。我真的很感激任何帮助。

-(void)waitAndFillPlaylistPool {
    // arrPlaylist -> mutablearray which stores the value of loaded playlist in order to use it later


    [SPAsyncLoading waitUntilLoaded:[SPSession sharedSession] timeout:kSPAsyncLoadingDefaultTimeout then:^(NSArray *loadedession, NSArray *notLoadedSession)
     {
         // The session is logged in and loaded — now wait for the userPlaylists to load.
         NSLog(@"[%@ %@]: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), @"Session loaded.");

         [SPAsyncLoading waitUntilLoaded:[SPSession sharedSession].userPlaylists timeout:kSPAsyncLoadingDefaultTimeout then:^(NSArray *loadedContainers, NSArray *notLoadedContainers)
          {
              // User playlists are loaded — wait for playlists to load their metadata.
              NSLog(@"[%@ %@]: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), @"Container loaded.");

              NSMutableArray *playlists = [NSMutableArray array];
              [playlists addObject:[SPSession sharedSession].starredPlaylist];
              [playlists addObject:[SPSession sharedSession].inboxPlaylist];
              [playlists addObjectsFromArray:[SPSession sharedSession].userPlaylists.flattenedPlaylists];

              [SPAsyncLoading waitUntilLoaded:playlists timeout:kSPAsyncLoadingDefaultTimeout then:^(NSArray *loadedPlaylists, NSArray *notLoadedPlaylists)
               {
                   // All of our playlists have loaded their metadata — wait for all tracks to load their metadata.
                   NSLog(@"[%@ %@]: %@ of %@ playlists loaded.", NSStringFromClass([self class]), NSStringFromSelector(_cmd),
                         [NSNumber numberWithInteger:loadedPlaylists.count], [NSNumber numberWithInteger:loadedPlaylists.count + notLoadedPlaylists.count]);
                   NSLog(@"loadedPlaylists >> %@",loadedPlaylists);

                   arrPlaylist = [[NSMutableArray alloc] initWithArray:loadedPlaylists];
                   NSLog(@"arrPlaylist >> %@",arrPlaylist);

               }];
          }];
     }];
}


- (NSInteger) tableView:(UITableView *) tableView numberOfRowsInSection:(NSInteger)section {

    return [arrPlaylist count];
}

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

    static NSString *CellIdentifier = @"Cell";

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

        cell.textLabel.text = [arrPlaylist objectAtIndex:indexPath.row];
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;


    return cell;
}

Answer 1

很难说你在方法waitAndFillPlaylistPool中做了什么，但如果这需要任何时间来获取这些数据，那么你需要在你的表视图（[self.tableView reloadData]）上调用reloadData作为该方法的最后一行（或者当任何异步方法返回时——我不知道它可能在你的代码中的什么位置）。