iOS aspect ratio constraint breaks on iOS7, works on iOS8

Question

In my app, I have setup a UIView\'s constraints in a way where its height gets calculated from its width using the aspect ratio constraint. It works perfectly on iOS8 with every

Answer 1

I have this problem with NSLayoutConstraint and multiplier on iOS 7. Works perfectly on iOS 8.

I'm using multiplier with value 0.2 and it causes errors!

NSLayoutConstraint(item: BT_Facebook,
              attribute: NSLayoutAttribute.Width,
              relatedBy: .Equal,
                 toItem: nil,
              attribute: .Width,
             multiplier: 0.2,
               constant: sizeBtRedeSociais)

The solution is to use the size of the screen, and not percentages.

var sizeBtRedeSociais = UIScreen.mainScreen().bounds.width / 5
var BT_FacebookWidth = NSLayoutConstraint(item: BT_Facebook, attribute: NSLayoutAttribute.Width, relatedBy: .Equal, toItem: nil, attribute: .Width, multiplier: 1, constant: sizeBtRedeSociais)
var BT_TwitterWidth = NSLayoutConstraint(item: BT_Twitter, attribute: NSLayoutAttribute.Width, relatedBy: .Equal, toItem: nil, attribute: .Width, multiplier: 1, constant: sizeBtRedeSociais)
var BT_InstagramWidth = NSLayoutConstraint(item: BT_Instagram, attribute: NSLayoutAttribute.Width, relatedBy: .Equal, toItem: nil, attribute: .Width, multiplier: 1, constant: sizeBtRedeSociais)
var BT_GoogleWidth = NSLayoutConstraint(item: BT_Google, attribute: NSLayoutAttribute.Width, relatedBy: .Equal, toItem: nil, attribute: .Width, multiplier: 1, constant: sizeBtRedeSociais)
var BT_YoutubeWidth = NSLayoutConstraint(item: BT_Youtube, attribute: NSLayoutAttribute.Width, relatedBy: .Equal, toItem: nil, attribute: .Width, multiplier: 1, constant: sizeBtRedeSociais)