快速获取修剪视频的缩略图

Question

这是我的代码：
当我尝试执行此操作时
self.my.image = UIImage(contentsOfFile: "\(self.sharedelegate.editthumbforvideo)")，
self.my.image 的值总是打印 nil。self.videodelegate.editthumbforvideo 数据类型是 (UIImage) 和 my.image 是 (UIImageview)。

不知道如何解决这个问题，无法获得修剪后视频的缩略图。

提前致谢

            let url=NSURL(fileURLWithPath: videoPath as String)
            let asset: AVAsset = AVAsset(URL: url)
            let imageGenerator = AVAssetImageGenerator(asset: asset);
            imageGenerator.appliesPreferredTrackTransform = true

            let timestamp = CMTime(seconds: 0.0, preferredTimescale:        60)
            var actualTime : CMTime = CMTimeMake(0, 0)
            let myImage = try?( imageGenerator.copyCGImageAtTime(timestamp, actualTime: &actualTime))
            self.image=UIImage(CGImage: myImage!)
            print("my print...\(self.image)")
            self.videodelegate.editthumbforvideo = self.image
            self.my.image = UIImage(contentsOfFile: "\(self.sharedelegate.editthumbforvideo)")

Answer 1

您可以通过编写以下代码来创建缩略图，

var err: NSError? = nil
let url=NSURL(fileURLWithPath: videoPath as String)
let asset = AVURLAsset(URL: url, options: nil)
let imgGenerator = AVAssetImageGenerator(asset: asset)
let cgImage = imgGenerator.copyCGImageAtTime(CMTimeMake(0, 1), actualTime: nil, error: &err)

let uiImage = UIImage(CGImage: cgImage)
let imageView = UIImageView(image: uiImage)

希望这会对你有所帮助。