尝试将一些动画调整为Swift3语法时遇到此错误.
UIView.animate(withDuration: duration, delay: 0.0, usingSpringWithDamping: 0.5,
initialSpringVelocity: 0.8, options: [] , animations: {
fromView.transform = offScreenLeft
toView.transform = CGAffineTransformIdentity
}, completion: { finished in
transitionContext.completeTransition(true)
})
得到了这个:
Swift中没有'CGAffineTransformIdentity'