SDL在iOS上保存截图

概述我试图将屏幕或框架从SDL的“窗口”保存到PNG文件中,因此我使用的是 SDL_image library.我的代码如下 IMG_Init(Int32(IMG_INIT_PNG.rawValue))let screenShot = SDL_CreateRGBSurface(0, 640, 480, 32, 0, 0, 0, 0)SDL_SetRenderTarget(renderer, tex 我试图将屏幕或框架从SDL的“窗口”保存到PNG文件中,因此我使用的是 SDL_image library.我的代码如下

img_Init(Int32(img_INIT_PNG.rawValue))let screenShot = SDL_CreateRGBSurface(0,640,480,32,0)SDL_Setrendertarget(renderer,texture)SDL_RenderReadPixels(renderer,nil,Uint32(SDL_PIXELFORMAT_ARGB8888),screenShot?.pointee.pixels,(screenShot?.pointee.pitch)!)let documentsPath = NSSearchPathForDirectorIEsInDomains(.documentDirectory,.userDomainMask,true)[0] as Stringimg_SavePNG(screenShot,"\(documentsPath)/image.png")SDL_FreeSurface(screenShot)

但是没有保存image.png.如果有人可以带领或帮助我.谢谢！

附加代码,保存的图像只是黑色

img_Init(Int32(img_INIT_PNG.rawValue))let screenShot = SDL_CreateRGBSurface(Uint32(SDL_SWSURFACE),0)// SDL_Setrendertarget(renderer,(screenShot?.pointee.pitch)!)// Save to documents directorylet fileManager = fileManager.defaultdo {    let documentDirectory = try fileManager.url(for: .documentDirectory,in: .userDomainMask,appropriateFor: nil,create: true)    let fileUrl = documentDirectory.appendingPathComponent("imageLol.png")    if !fileManager.fileExists(atPath: fileUrl.path) {        print("file NO exists")        // Create file at path        let data = Data()        let createfile = fileManager.createfile(atPath: fileUrl.path,contents: data,attributes: nil)        if createfile {            print("Create file success")        } else {            print("Create file Failed")        }    } else {        print("file exists")    }    let result = img_SavePNG(screenShot,fileUrl.path)    print("result = \(result)")    // After saving screenshot    let image = UIImage(contentsOffile: fileUrl.path)    let imageData = UIImagePNGRepresentation(image!)    print("image length = \(String(describing: imageData?.count))")    UIImageWritetoSavedPhotosAlbum(image!,nil)    SDL_FreeSurface(screenShot)} catch {    print("Error docs = \(error)")}

解决方法 它不会在屏幕截图中显示视频帧.只有在播放视频时才会显示黑屏图像.

请尝试截取任何应用程序屏幕的屏幕截图,看看它是否正常工作.

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