swift 合成 gif 代码

你好，以下是 Swift 合成 GIF 的代码示例：

import UIKit
import ImageIO
import MobileCoreServices

// 设置 GIF 属性
let fileProperties = [kCGImagePropertyGIFDictionary as String: [kCGImagePropertyGIFLoopCount as String: 0]]
let frameProperties = [kCGImagePropertyGIFDictionary as String: [kCGImagePropertyGIFDelayTime as String: 0.1]]
let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]

//获取要生成 GIF 图片的序列帧
var images = [UIImage]()
for index in 0...9 {
    let imageName = "image\(index)"
    let imagePath = Bundle.main.path(forResource: imageName, ofType: "png")!
    let image = UIImage(contentsOfFile: imagePath)!
    images.append(image)
}

//将序列帧存入文件夹
var imagePaths = [String]()
for (index, image) in images.enumerated() {
    let imageName = "frame\(index).png"
    let imagePath = "\(documentsPath)/\(imageName)"
    let imageData = image.pngData()!
    try! imageData.write(to: URL(fileURLWithPath: imagePath))
    imagePaths.append(imagePath)
}

//将所有序列帧合成 GIF 图片
let gifPath = "\(documentsPath)/result.gif"
let url = CFURLCreateWithFileSystemPath(nil, gifPath as CFString, .cfurlposixPathStyle, false)
let destination = CGImageDestinationCreateWithURL(url!, kUTTypeGIF, images.count, nil)
CGImageDestinationSetProperties(destination!, fileProperties as CFDictionary)
for imagePath in imagePaths {
    let url = CFURLCreateWithFileSystemPath(nil, imagePath as CFString, .cfurlposixPathStyle, false)
    let imageSource = CGImageSourceCreateWithURL(url!, nil)!
    CGImageDestinationAddImageFromSource(destination!, imageSource, 0, frameProperties as CFDictionary)
}
CGImageDestinationFinalize(destination!)

希望能够帮助你！