RemoveAllConstraints.swift

extension UIView {
  func removeAllConstraints() {
    var superview = self.superview
    while superview != nil {
      for c in superview!.constraints {
        if c.firstItem as? UIView == self || c.secondItem as? UIView == self {
          superview!.removeConstraint(c)
        }
      }
      superview = superview!.superview
    }
    self.removeConstraints(self.constraints)
    self.translatesAutoresizingMaskIntoConstraints = false
  }
}