具體實(shí)現(xiàn)步驟
1.加載gif圖片,并且轉(zhuǎn)成Data類型
2.從data中讀取數(shù)據(jù):將data轉(zhuǎn)成CGImageSource對(duì)象
3.獲取所有圖片
4.播放圖片組
import UIKit
import ImageIO
class ViewController: UIViewController {
@IBOutlet weak var imageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// 1.加載Gif圖片, 并且轉(zhuǎn)成Data類型
guard let path = Bundle.main.path(forResource: "demo.gif", ofType: nil) else { return }
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(duì)象
guard let imageSource = CGImageSourceCreateWithData(data, nil) else { return }
let imageCount = CGImageSourceGetCount(imageSource)
// 3.便利所有的圖片
var images = [UIImage]()
var totalDuration : TimeInterval = 0
for i in 0..<imageCount {
// 3.1.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)
// 3.2.取出持續(xù)的時(shí)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()
}
}
