title: Nonidentity Multipliers of Constraint Equations for Location Attributes in IOS Auto Layout
body: <p>According to the <a href="https://developer.apple.com/library/content/documentation/UserExperience/Conceptual/AutolayoutPG/AnatomyofaConstraint.html#//apple_ref/doc/uid/TP40010853-CH9-SW1" rel="nofollow noreferrer">Apple Auto Layout Guide</a>:
  <em>You cannot use a nonidentity multiplier (a value other than 1.0) with location attributes</em>.</p>
  
  <p>If I understand the so-called nonidentity multiplier correctly, the multiplier should always be 1.0 when setting up a constraint for the location attribute. But I tried in Xcode and found the multiplier could be any positive number(int or floating). Check the screenshot below for my testing.</p>
  
  <p><a href="https://i.stack.imgur.com/dV2vQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dV2vQ.png" alt="screenshot"></a></p>
  
  <p>Is it that I understood the above rule specified in the Apple Guide incorrectly or that I modified the multiplier value in a wrong way in Xcode? </p>