iOS動畫分為顯示動畫（keyFrameAnimation PropertyAnimation CATransaction）隱式動畫 CATransaction表示一個動畫事務，可以設置layer層的屬性，再結合CAAnimation即可實現動畫效果

           class func textLayerAnimation(layer: CALayer, durationTime: TimeInterval, delay: TimeInterval, effectAnimationClosure: effectAnimationLayerClosure?,finishedClosure: completionClosure?) -> Void{
        let animationObjct = TELayerAnimation()
        DispatchQueue.main.asyncAfter(deadline: .now() + delay) {
            let oldLayer = animationObjct.animatableLayerCopy(layer: layer)
            var newLayer: CALayer?
            var animationGroup: CAAnimationGroup?
            animationObjct.completionBlock = finishedClosure
            if let effectAnimationClosure = effectAnimationClosure{
                CATransaction.begin()
                //關閉隱式動畫
                CATransaction.setDisableActions(true)
                newLayer = effectAnimationClosure(layer)
                CATransaction.commit()
            }
            animationGroup = animationObjct.groupAnimationWithLayerChanges(old: oldLayer, new: newLayer!)
            if let textAnimationGroup = animationGroup{
                animationObjct.textLayer = layer
                textAnimationGroup.timingFunction = CAMediaTimingFunction.init(name: kCAMediaTimingFunctionEaseInEaseOut)
                textAnimationGroup.beginTime = CACurrentMediaTime()
                textAnimationGroup.duration = durationTime
                textAnimationGroup.delegate = animationObjct
                layer.add(textAnimationGroup, forKey: textAnimationGroupKey)
            }else{
                if finishedClosure != nil{
                    finishedClosure!(true)
                }
            }
        }
    }