title: Show UIWebView once
body: <p>I was wondering if there was a code to show a <code>UIWebView</code> only once. I mean in my app there is a view with a button which leads to an exercise page, that is always the same. I would like to make so that if I open the page clicking the button for the second and third time, the numbers on the page change.</p>
  
  <p>Example:</p>
  
  <p>So first time: 1+2
  Then the equation becomes 3+2 the second time I open the page. By the third, it goes back to the first: 1+2</p>
  
  <p>I am using storyboard. I added various view controllers. One of these viewcontrollers contains the exercises. So I inserted various labels, buttons, textboxes and images, and then dragged the blue line to the .h file. Then I created an event, and an if, else to label.text the answer. Now everything works fine, and when I enter the view controller with the exercises they appear, and they work correctly. But since they are exercises, I wanted to change the question (so the numbers in the exercises, the answers, and the photos showing the image of the triangles) each time you enter the view. At least 4 times. I would also need to give a score out of 4 (four exercises). Until now I insert the number in the textbot, and the result appears in the label. Unfortunately since I am using the iPad I can't upload an image.</p>