title: Label.text is not updating
body: <p>The problem is label.text value became nil every time all the time accept in viewload. I do not know what is the issue.</p>
  
  <p>I have this code in swift 3 Xcode 8, I have a label as shown below </p>
  
  <p>Label to be set later</p>
  
  <p><a href="https://i.stack.imgur.com/pqRAz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pqRAz.png" alt="enter image description here"></a></p>
  
  <p>then I want to assign the label a value when the view loads as initial value </p>
  
  <p>This is once view loads and it is working fine :)</p>
  
  <p><a href="https://i.stack.imgur.com/z1ijS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/z1ijS.png" alt="enter image description here"></a></p>
  
  <p>later on I want to change the label value to the current Date which I would like it to be set when the user moves to another view the comes back , so I made the function open as you say .. </p>
  
  <p>Here is how I call the function </p>
  
  <p>function call from secondViewController</p>
  
  <p><a href="https://i.stack.imgur.com/BFy5k.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BFy5k.png" alt="enter image description here"></a></p>
  
  <p>finally I want to set it to those values </p>
  
  <p><a href="https://i.stack.imgur.com/Nfr1C.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Nfr1C.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/Nfr1C.png" rel="nofollow noreferrer">last desired values</a></p>