阿尼玛 Anima是Swift5的可链接的基于图层的动画库。 它支持使序列动画和分组动画更容易。 编写如下。 let startAnimations: [AnimaType] = [. moveByY ( -50 ), . rotateByZDegree ( 90 )] let moveAnimations: [AnimaType] = [. moveByX ( 50 ), . rotateByZDegree ( 90 )] let endAnimations: [AnimaType] = [. moveByY ( -50 ), . rotateByZDegree ( 90 )] animaView. layer . anima . then (. opacity ( 1.0 )) . then ( group : startAnimations) . then