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Swift-Extension-UIImage.zip

效果

使用

import UIKit
import SnapKit
import Alamofire

class ViewController: UIViewController {
    
    lazy private var imageView : UIImageView = {
        let imageView = UIImageView()
        return imageView
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .white
        
        imageView.image = UIImage.gif(name: "nahuoLoading")
        view.addSubview(imageView)
        imageView.snp.makeConstraints { make in
            make.width.height.equalTo(50)
            make.center.equalToSuperview()
        }
       
        
        
    }
 
    
}

封装代码

import UIKit
import ImageIO
import MobileCoreServices

extension UIImage {
    
    /// 根据本地 GIF 文件名生成动画 UIImage
    /// - Parameter name: GIF 文件名（不带扩展名）
    /// - Returns: 可选的 UIImage（animated）
    static func gif(name: String) -> UIImage? {
        guard let path = Bundle.main.path(forResource: name, ofType: "gif"), let gifData = try? Data(contentsOf: URL(fileURLWithPath: path)) else {
            return nil
        }
        return gif(data: gifData)
        
    }
    
    /// 根据 Data 生成动画 UIImage
    /// - Parameter data: GIF 二进制数据
    /// - Returns: 可选的 UIImage（animated）
    static func gif(data: Data) -> UIImage? {
        guard let source = CGImageSourceCreateWithData(data as CFData, nil) else {
            print("Cannot create image source")
            return nil
        }
        
        let count = CGImageSourceGetCount(source)
        var images = [UIImage]()
        var duration: TimeInterval = 0
        
        for i in 0..<count {
            if let cgImage = CGImageSourceCreateImageAtIndex(source, i, nil) {
                images.append(UIImage(cgImage: cgImage))
                
                // 获取每帧持续时间
                let properties = CGImageSourceCopyPropertiesAtIndex(source, i, nil) as Dictionary?
                if let gifInfo = properties?[kCGImagePropertyGIFDictionary as String as NSObject] as? [String: Any] {
                    if let delayTime = gifInfo[kCGImagePropertyGIFUnclampedDelayTime as String] as? NSNumber {
                        duration += delayTime.doubleValue
                    } else if let delayTime = gifInfo[kCGImagePropertyGIFDelayTime as String] as? NSNumber {
                        duration += delayTime.doubleValue
                    }
                }
            }
        }
        
        if duration == 0 {
            duration = Double(count) * 0.1
        }
        
        return UIImage.animatedImage(with: images, duration: duration)
    }
}