I tried to get some data from `NSMutableDictionary`, 

```
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{   
    long time = (long)[[tempPosts allKeys] objectAtIndex:section];
    return [[tempPosts objectForKey:[[NSNumber numberWithLong:time] stringValue]] count];
}

```

But this is giving me a `<nil>`. 
[![enter image description here](https://i.stack.imgur.com/w7vl1.png)](https://i.stack.imgur.com/w7vl1.png)