闲来无事写的 Core Image 里的滤镜效果的Demo,目前 Core Image 有100多种滤镜效果,Demo实现了其中大概一半的效果,实在太多了,后面有时间再补全,有兴趣的可以下载下来看一下(最好用真机查看,模拟器实在太卡了) Demo地址: https://github.com/cdcyd/CCFilters 滤镜的核心实现代码只需三行,如下
代码语言:javascript复制func filter(name: String, parameters: [String:Any]) -> UIImage? {
guard let image = self.cgImage else {
return nil
}
#if DEBUG
let filter = CIFilter(name: name)
print(filter?.attributes as Any)
#endif
// 输入CIImage
let input = CIImage(cgImage: image)
// 输出CIImage
let output = input.applyingFilter(name, parameters: parameters)
// 渲染图片(CIImage->CGImage)
guard let cgimage = CIContext(options: nil).createCGImage(output, from: input.extent) else {
return nil
}
return UIImage(cgImage: cgimage)
}