Swift でアニメーションの連続実行をしてみる話 ref: http://qiita.com/lovee/items/460cbb02a345e0ff7910

Playground.swift

let base = UIView(frame: CGRect(x: 0, y: 0, width: 400, height: 400))
base.backgroundColor = .white
PlaygroundPage.current.liveView = base

let view = UIView(frame: CGRect(x: 100, y: 100, width: 200, height: 200))
view.backgroundColor = .blue
base.addSubview(view)

// アニメーションブロック
UIView.animate(eachBlockDuration: 1, eachBlockDelay: 0, eachBlockOptions: .curveEaseInOut, animationBlocks:
    { view.frame.origin = .zero },
    { view.frame.size.width = 400 },
    { view.frame.size.height = 400 }
) { (finished) in
    print(finished)
}

UIView.swift

private extension ArraySlice {

    var startItem: Element {
        return self[self.startIndex]
    }

}

extension UIView {

    private typealias `Self` = UIView

    private static func animate(eachBlockDuration duration: TimeInterval, eachBlockDelay delay: TimeInterval, eachBlockOptions options: UIViewAnimationOptions, animationArraySlice: ArraySlice<() -> Void>, completion: ((_ finished: Bool) -> Void)?) {

        let animation = animationArraySlice.startItem

        UIView.animate(withDuration: duration, delay: delay, options: options, animations: animation) { (finished) in

            let remainedAnimations = animationArraySlice.dropFirst()

            if remainedAnimations.isEmpty {
                completion?(finished)

            } else {
                Self.animate(eachBlockDuration: duration, eachBlockDelay: delay, eachBlockOptions: options, animationArraySlice: remainedAnimations, completion: completion)
            }

        }

    }

    public static func animate(eachBlockDuration duration: TimeInterval, eachBlockDelay delay: TimeInterval = 0, eachBlockOptions options: UIViewAnimationOptions = .curveEaseInOut, animationBlocks: (() -> Void)..., completion: ((_ finished: Bool) -> Void)? = nil) {

        let isFinished = animationBlocks.isEmpty

        guard isFinished == false else {
            completion?(isFinished)
            return
        }

        let animationArraySlice = ArraySlice(animationBlocks)

        Self.animate(eachBlockDuration: duration, eachBlockDelay: delay, eachBlockOptions: options, animationArraySlice: animationArraySlice, completion: completion)

    }

}