iOS将GIF转变为图片

import UIKit
import ImageIO

class Tools: NSObject {
class func parseGIFDataToImageArray(data: NSData) -> [UIImage]{
var images: [UIImage] = []
let src = CGImageSourceCreateWithData(data as CFDataRef,nil)
var animationTime: CGFloat = 0.8
if let src = src {
let total = CGImageSourceGetCount(src)
for var i = 0;i < total;i++ {
let img = CGImageSourceCreateImageAtIndex(src, i, nil)
let properties = CGImageSourceCopyPropertiesAtIndex(src, i, nil)! as Dictionary
let imageProperties = properties[kCGImagePropertyGIFDictionary as String]!
let delayTime = imageProperties[kCGImagePropertyGIFUnclampedDelayTime as String] as! NSNumber
animationTime += CGFloat(delayTime)

if let img = img {
images.append(UIImage(CGImage: img))
}
}
print("time=\(animationTime)")
}
return images
}
}