swift3播放本地GIF图

最新推荐文章于 2024-05-12 09:56:03 发布

cloudtarget

最新推荐文章于 2024-05-12 09:56:03 发布

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文章标签： GIF

本文链接：https://blog.youkuaiyun.com/callzjy/article/details/67821203

版权

这篇博客介绍如何在Swift3中加载并播放本地GIF图像。通过使用`ImageIO`库，从Bundle获取GIF文件路径，读取数据并创建`CGImageSource`，然后遍历每一帧，提取图片并计算总帧间隔时间来设置动画效果。

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import UIKit
import ImageIO

class ViewController: UIViewController {

    @IBOutlet weak var imageView: UIImageView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        guard let path = Bundle.main.path(forResource: "demo.gif", ofType: nil),
let data = NSData(contentsOfFile: path),
let imageSource = CGImageSourceCreateWithData(data, nil) else { return }
        
        var images = [UIImage]()
        var totalDuration : TimeInterval = 0
        for i in 0..<CGImageSourceGetCount(imageSource) {
            guard let cgImage = CGImageSourceCreateImageAtIndex(imageSource, i, nil) else { continue }
            let image = UIImage(cgImage: cgImage)
            i == 0 ? imageView.image = image : ()
            images.append(image)
            
            guard let properties = CGImageSourceCopyPropertiesAtIndex(imageSource, i, nil) as? NSDictionary,
let gifDict = properties[kCGImagePropertyGIFDictionary] as? NSDictionary,
let frameDuration = gifDict[kCGImagePropertyGIFDelayTime] as? NSNumber else { continue }
            totalDuration += frameDuration.doubleValue
        }
        
        imageView.animationImages = images
        imageView.animationDuration = totalDuration
        imageView.animationRepeatCount = 0
        
        imageView.startAnimating()
    }


}