iOS --- 使用UIImageView来实现倒计时动画

UIImageView动画

// these allow a set of images to be animated. the array may contain multiple copies of the same

public var animationImages: [UIImage]? // The array must contain UIImages. Setting hides the single image. default is nil
@available(iOS 3.0, *)
public var highlightedAnimationImages: [UIImage]? // The array must contain UIImages. Setting hides the single image. default is nil

public var animationDuration: NSTimeInterval // for one cycle of images. default is number of images * 1/30th of a second (i.e. 30 fps)
public var animationRepeatCount: Int // 0 means infinite (default is 0)

// When tintColor is non-nil, any template images set on the image view will be colorized with that color.
// The tintColor is inherited through the superview hierarchy. See UIView for more information.
@available(iOS 7.0, *)
public var tintColor: UIColor!

public func startAnimating()
public func stopAnimating()
public func isAnimating() -> Bool

func imageViewAnimation() {
var images: Array = Array<UIImage>()
for var i in 1...10 {
images.append(UIImage(named: "\(i).jpg")!)
}
images = images.reverse()
imageView.animationImages = images
imageView.animationRepeatCount = 0
imageView.animationDuration = 10
imageView.startAnimating()
}

Demo