title: Unable to simultaneously satisfy constraints error makes the screen flickers in IOS 9
body: <p>I am getting following log in my console in XCode.</p>
  
  <pre><code>2016-10-12 16:48:13.218 xx[319:19209] Unable to simultaneously satisfy constraints.
  Probably at least one of the constraints in the following list is one you don't want. 
  Try this: 
      (1) look at each constraint and try to figure out which you don't expect; 
      (2) find the code that added the unwanted constraint or constraints and fix it. 
  (
  "&lt;NSLayoutConstraint:0x16c610c0 H:[JTImageButton:0x16c61120'\Ufffc(null)'(130)]&gt;",
  "&lt;NSLayoutConstraint:0x16be02a0 '_UITemporaryLayoutWidth' H:[JTImageButton:0x16c61120'\Ufffc(null)'(1000)]&gt;"
  )
  
  Will attempt to recover by breaking constraint 
  </code></pre>
  
  <p></p>
  
  <pre><code>Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
  The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in &lt;UIKit/UIView.h&gt; may also be helpful.
  </code></pre>
  
  <p>And my screen flickers when this log happens.</p>
  
  <p>How can I solve that?</p>