.net - Objective-C to Monotouch (.NET) 单行代码转换

Question

我有这 3 行。中间那个，不知道怎么转换:

源 Obj-C

 CGContextRef ctx = UIGraphicsGetCurrentContext();
 [[UIColor blackColor] set];
 CGContextFillRect(ctx, screenRect);

Objective-C#

CGContext ctx = UIGraphics.GetCurrentContext ();
// ??? [[UIColor blackColor] set]; ???
ctx.FillRect (screenRect);

Answer 1

这是我为任何需要 MonoTouch 版本的人制作的完整屏幕截图代码:

    public static UIImage TakeScreenShot (UIView view)
    {
        try
        {
            RectangleF canvasRect = view.Bounds;
            UIGraphics.BeginImageContext (canvasRect.Size);

            CGContext ctx = UIGraphics.GetCurrentContext ();
            ctx.FillRect (canvasRect);
            view.Layer.RenderInContext (ctx);

            UIImage newImage = UIGraphics.GetImageFromCurrentImageContext ();

            UIGraphics.EndImageContext ();

            return newImage;
        }
        catch
        {
            return null;
        }
    }