UIViewAnimationOptions swift 2

  UIView.animateWithDuration(0.5, delay: 0.5, usingSpringWithDamping: 0.5, initialSpringVelocity: 0.0, options: [], animations: {
        self.loginButton.center.y -= 30.0
        self.loginButton.alpha = 1.0 }, completion: nil)

 

UIViewAnimationOptions 空 可写成[]

多个组合 [.x,.y,.z]