title: Explain Aspect Ratio and respective terms in iOS?
body: <p>I want to understand Aspect Ratio.</p>
  
  <p><a href="https://i.stack.imgur.com/NddOe.png" rel="noreferrer"><img src="https://i.stack.imgur.com/NddOe.png" alt="enter image description here"></a></p>
  
  <p>Here, I am setting Aspect Ratio of an UIImageView.</p>
  
  <p><a href="https://i.stack.imgur.com/WcGNE.png" rel="noreferrer"><img src="https://i.stack.imgur.com/WcGNE.png" alt="enter image description here"></a></p>
  
  <p>These are options when I click this constraint.</p>
  
  <p>How this constraint works and what are <strong>"PRESETS", Reverse Multiplier and Convert to Decimal.</strong></p>
  
  <p>Thanks.</p>