// 1.加載Gif圖片, 并且轉(zhuǎn)成Data類型

guard let path = Bundle.main.path(forResource: "demoGif.gif", ofType: nil)

guard let data = NSData(contentsOfFile: path) else { return }

// 2.從data中讀取數(shù)據(jù): 將data轉(zhuǎn)成CGImageSource對象

guard let imageSource = CGImageSourceCreateWithData(data, nil) else { return }

let imageCount = CGImageSourceGetCount(imageSource)

// 3.遍歷所有圖片

var images = [UIImage]()

var totalDuration : TimeInterval = 0

for i in 0..<imageCount {

? ? //取出圖片

guard let cgImage = CGImageSourceCreateImageAtIndex(imageSource, i, nil) else { continue }

let image = UIImage(cgImage: cgImage)

if i == 0 {

imageView.image = image

}

images.append(image)

? // 取出持續(xù)的時間

guard let properties = CGImageSourceCopyPropertiesAtIndex(imageSource, i, nil) as? NSDictionary else { continue }

guard let gifDict = properties[kCGImagePropertyGIFDictionary] as? NSDictionary else { continue }

guard let frameDuration = gifDict[kCGImagePropertyGIFDelayTime] as? NSNumber else { continue }

totalDuration += frameDuration.doubleValue

}

// 4.設(shè)置imageView的屬性

imageView.animationImages = images

imageView.animationDuration = totalDuration

imageView.animationRepeatCount = 0

// 5.開始播放

imageView.startAnimating()