72 lines
2.3 KiB
Swift
72 lines
2.3 KiB
Swift
import ImageIO
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import Runes
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import UIKit
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/// A subclass of `UIImageView` that can be animated using an image name string or raw data.
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public class AnimatableImageView: UIImageView, Animatable {
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/// An `Animator` instance that holds the frames of a specific image in memory.
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var animator: Animator?
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deinit {
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println("deinit animatable view")
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}
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/// A computed property that returns whether the image view is animating.
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public var isAnimatingGIF: Bool {
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return animator?.isAnimating ?? isAnimating()
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}
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/// Prepares the frames using a GIF image file name, without starting the animation.
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/// The file name should include the `.gif` extension.
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///
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/// :param: imageName The name of the GIF file. The method looks for the file in the app bundle.
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public func prepareForAnimation(imageNamed imageName: String) {
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let path = NSBundle.mainBundle().bundlePath.stringByAppendingPathComponent(imageName)
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prepareForAnimation <^> NSData(contentsOfFile: path)
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}
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/// Prepares the frames using raw GIF image data, without starting the animation.
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///
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/// :param: data GIF image data.
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public func prepareForAnimation(imageData data: NSData) {
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image = UIImage(data: data)
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animator = Animator(data: data, delegate: self)
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}
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/// Prepares the frames using a GIF image file name and starts animating the image view.
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///
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/// :param: imageName The name of the GIF file. The method looks for the file in the app bundle.
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public func animateWithImage(named imageName: String) {
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prepareForAnimation(imageNamed: imageName)
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startAnimatingGIF()
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}
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/// Prepares the frames using raw GIF image data and starts animating the image view.
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///
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/// :param: data GIF image data.
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public func animateWithImageData(#data: NSData) {
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prepareForAnimation(imageData: data)
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startAnimatingGIF()
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}
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/// Updates the `UIImage` property of the image view if necessary. This method should not be called manually.
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override public func displayLayer(layer: CALayer!) {
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image = animator?.currentFrame
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}
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/// Starts the image view animation.
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public func startAnimatingGIF() {
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animator?.resumeAnimation() ?? startAnimating()
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}
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/// Stops the image view animation.
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public func stopAnimatingGIF() {
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animator?.pauseAnimation() ?? stopAnimating()
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}
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public func cleanup() {
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animator = .None
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}
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}
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