title: iOS auto layout ios7 vs ios8
body: <p>What exactly are the improvements in auto layout ios 7 and ios 8?</p>
  
  <p>My app is working fine in ios 8 but has different behavior in ios7. Constraints are breaking in ios 7 after loading views multiple times. </p>
  
  <p>I want to know what are the things that ios 8 now handles which ios7 autolayout cannot do before. </p>
  
  <p>Like how iOS 7 and iOS 8 handles "manually added subviews" with autoresizing masks ( Flexible width and Flexible height )</p>
  
  <p>Thanks!!</p>
  
  <p>**im not using size classes and relative to margin</p>