使用 Avplayer ios 10* 的屏幕截图图像是黑色图像

Posted 2023-03-11

【中文标题】使用 Avplayer ios 10* 的屏幕截图图像是黑色图像

【英文标题】：screenShot image with Avplayer ios 10* is Black image

【发布时间】：2019-05-21 09:54:23

【问题描述】：

extension UIView 
    func capture() -> UIImage? 
        var image: UIImage?

        if #available(ios 10.0, *) 
            let format = UIGraphicsImageRendererFormat()
            format.opaque = isOpaque
            let renderer = UIGraphicsImageRenderer(size: frame.size, format: format)
            image = renderer.image  context in
                drawHierarchy(in: frame, afterScreenUpdates: true)
            
         else 
            UIGraphicsBeginImageContextWithOptions(frame.size, isOpaque, UIScreen.main.scale)
            drawHierarchy(in: frame, afterScreenUpdates: true)
            image = UIGraphicsGetImageFromCurrentImageContext()
            UIGraphicsEndImageContext()
        

        return image
    

【问题讨论】：

您想用播放器从 avplayer 或全屏屏幕截图中捕获图像？

我想从视图层 avplayer 捕获图像

这对我有用，参考...github.com/acotilla91/ACThumbnailGenerator-Swift

哇，太棒了！！...

谢谢支持

【参考方案1】：

public extension AVAsset 
    func takeScreenshot(at: Double,completion: @escaping (UIImage?) -> Void) 
            DispatchQueue.global().async 
                let imageGenerator = AVAssetImageGenerator(asset: self)
                let time = CMTime(seconds: at, preferredTimescale: 600)
                let times = [NSValue(time: time)]
                imageGenerator.generateCGImagesAsynchronously(forTimes: times, completionHandler:  _, image, _, _, _ in
                    if let image = image 
                        completion(UIImage(cgImage: image))
                     else 
                        completion(nil)
                    
                )