Swift 播放gif图片 - lidaoyuan/Notes GitHub Wiki

extension UIImageView {
    
    func playGif(_ data: Data) {
        guard let imageSource = CGImageSourceCreateWithData(data as CFData, nil) else { return }
        let imageCount = CGImageSourceGetCount(imageSource)
        
        
        var images = [UIImage]()
        var totalDuration : TimeInterval = 0
        for i in 0..<imageCount {
            
            guard let cgImage = CGImageSourceCreateImageAtIndex(imageSource, i, nil) else { continue }
            let image = UIImage(cgImage: cgImage)
            if i == 0 {
                self.image = image
            }
            images.append(image)
            
            guard let properties = CGImageSourceCopyPropertiesAtIndex(imageSource, i, nil) else { continue }
            guard let gifDict = (properties as NSDictionary)[kCGImagePropertyGIFDictionary] as? NSDictionary else { continue }
            guard let frameDuration = gifDict[kCGImagePropertyGIFDelayTime] as? NSNumber else { continue }
            totalDuration += frameDuration.doubleValue
        }
        
        animationImages = images
        animationDuration = totalDuration
        animationRepeatCount = 0
        startAnimating()
    }
}