Unable to draw shadow after cropping

Question

I needed to draw a shadow around user photos. I drew these photographs of a circle, drawing a circle and then cropping the context. Here is a snippet of my code:

+ (UIImage*)roundImage:(UIImage*)img imageView:(UIImageView*)imageView withShadow:(BOOL)shadow
{
    UIGraphicsBeginImageContextWithOptions(imageView.bounds.size, NO, [UIScreen mainScreen].scale);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextAddEllipseInRect(context, CGRectMake(0,0, imageView.width, imageView.height));
    CGContextSaveGState(context);
    CGContextClip(context);
    [img drawInRect:imageView.bounds];
    CGContextRestoreGState(context);
    if (shadow) {
        CGContextSetShadowWithColor(context, CGSizeMake(0, 0), 5, [kAppColor lighterColor].CGColor);
    }
    CGContextDrawPath(context, kCGPathFill);
    UIImage* roundImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return roundImage;
}

But after clipping the area, I could not draw a shadow below. So I had to draw another circle with a shadow behind the photos.

+ (UIImage *)circleShadowFromRect:(CGRect)rect circleDiameter:(CGFloat)circleDiameter shadowColor:(UIColor*)color
{
    UIGraphicsBeginImageContextWithOptions(rect.size, NO, [UIScreen mainScreen].scale);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor);
    CGFloat circleStartPointX = CGRectGetMidX(rect) - circleDiameter * 0.5;
    CGFloat circleStartPointY = CGRectGetMidY(rect) - circleDiameter * 0.5;
    CGContextAddEllipseInRect(context, CGRectMake(circleStartPointX,circleStartPointY, circleDiameter, circleDiameter));
    CGContextSetShadowWithColor(context, CGSizeMake(0, 0), 5, color.CGColor);
    CGContextDrawPath(context, kCGPathFill);
    UIImage *circle = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return circle;
}

, , - tableview. : ? , , , . , drawInRect , , . CGContextAddEllipseInRect, ?

Answer 1

, .

, , , , . , , , ..

" " , , , " " . , . , . , (: ) , .

, , , , .

, .

func roundedImage(for image: UIImage, bounds: CGRect, withShadow shadow: Bool) -> UIImage {
    UIGraphicsBeginImageContextWithOptions(bounds.size, false, 0.0)
    defer {
        UIGraphicsEndImageContext() 
    }

    let context = UIGraphicsGetCurrentContext()
    let circle = CGPathCreateWithEllipseInRect(bounds, nil)

    if shadow {
        // draw an elliptical shadow
        CGContextSaveGState(context)

        CGContextSetShadowWithColor(context, .zero, 5.0, UIColor.blackColor().CGColor)
        CGContextAddPath(context, circle)
        CGContextFillPath(context)

        CGContextRestoreGState(context) 
    }

    // clip to an elliptical shape, and draw the image
    CGContextAddPath(context, circle)
    CGContextClip(context)
    image.drawInRect(bounds)

    return UIGraphicsGetImageFromCurrentImageContext()
}

:

• 0.0 .
• , .

. ( ), ( ). , .

. , , , "" .

, , , , , . , ( ) , .

- , , (: . .). .

. , , , ( ). , , .

. , .

...

---

. , . shadowPath, .

.;)