在Swift中更改gif的颜色

guard let url = Bundle.main.url(forResource: "your_gif_file", withExtension: "gif") else {
    return
}

guard let data = try? Data(contentsOf: url) else {
    return
}

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

let gifDuration = getGifDuration(imageSource: imageSource) // 获取gif的总时长
let animatedImage = UIImage.animatedImage(with: imageSource, duration: gifDuration)

guard let cgImage = animatedImage?.cgImage else {
    return
}

let colorSpace = CGColorSpaceCreateDeviceRGB()
let bitmapInfo = cgImage.bitmapInfo.rawValue
let width = cgImage.width
let height = cgImage.height

guard let context = CGContext(data: nil, width: width, height: height, bitsPerComponent: 8, bytesPerRow: 0, space: colorSpace, bitmapInfo: bitmapInfo) else {
    return
}

context.draw(cgImage, in: CGRect(x: 0, y: 0, width: width, height: height))

context.setFillColor(UIColor.red.cgColor) // 设置为红色

let mask = cgImage.masking(colorComponents: [1, 1, 1, 1, 0, 0, 0, 0]) // 只对不透明的像素进行颜色更改
context.clip(to: mask!, mask: mask!)

context.fill(CGRect(x: 0, y: 0, width: width, height: height))

guard let modifiedImageRef = context.makeImage() else {
    return
}

let modifiedImage = UIImage(cgImage: modifiedImageRef)