title: Adding UIButton to UITableView section header
body: <p>I have a <code>UITableView</code> with 1 section and for the section header, I would like to keep everything about the header the same but simply add a button on the right side. I cannot put the button in the navigation controller because the two available spots to put such a button are already occupied by other buttons. </p>
  
  <p>Here you can see the result of what I tried to do. Now all I want to do is put an add button on the right side of the header, but what I have tried didn't work. I also tried some other solutions on StackOverflow, but they did not accomplish quite what I wanted to do. Additionally, if there is a better way of creating an add button, please let me know. I tried using a <code>UIBarButtonItem</code> but I couldn't figure out how to add its view to an actual view. Thanks!</p>
  
  <p><img src="https://i.stack.imgur.com/irAq3.png" alt="enter image description here"></p>
  
  <p>This is what I have so far in my delegate:</p>
  
  <pre><code>- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
  {
      UIButton *addButton = [[UIButton alloc] init]; //I also tried setting a frame for the
      button, but that did not seem to work, so I figured I would just leave it blank for posting       
      the question.
      addButton.titleLabel.text = @"+";
      addButton.backgroundColor = [UIColor redColor];
      [self.tableView.tableHeaderView insertSubview:addButton atIndex:0]; 
      //I feel like this is a bad idea
  
      return self.tableView.tableHeaderView;
  }
  
  - (CGFloat) tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
  {
      return 50;
  }
  </code></pre>