I'm trying to track down a bug in some iOS code for an iPad app. In one of our views, we've added sublayers to have a shadow and make sure the bottom of the view has rounded edges. Here's the code where we add the sublayers:
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.bounds
byRoundingCorners:(UIRectCornerBottomLeft|UIRectCornerBottomRight)
cornerRadii:CGSizeMake(12.0f, 12.0f)];
// Create the shadow layer
shadowLayer = [CAShapeLayer layer];
[shadowLayer setFrame:self.bounds];
[shadowLayer setMasksToBounds:NO];
[shadowLayer setShadowPath:maskPath.CGPath];
shadowLayer.shadowColor = [UIColor blackColor].CGColor;
shadowLayer.shadowOffset = CGSizeMake(0.0f, 0.0f);
shadowLayer.shadowOpacity = 0.5f;
shadowLayer.shadowRadius = 6.0f;
roundedLayer = [CALayer layer];
[roundedLayer setFrame:self.bounds];
[roundedLayer setBackgroundColor:[UIColor colorFromHex:@"#e4ecef"].CGColor];
[self.layer insertSublayer:shadowLayer atIndex:0];
// Add inner view (since we're rounding corners, parent view can't mask to bounds b/c of shadow - need extra view)
maskLayer = [CAShapeLayer layer];
maskLayer.frame = self.bounds;
maskLayer.path = maskPath.CGPath;
innerView = [[UIView alloc] initWithFrame:self.bounds];
innerView.backgroundColor = [UIColor whiteColor];
innerView.layer.mask = maskLayer;
[self addSubview:innerView];
It shows up fine on the screen of the iPad, but I want to take a screenshot programmatically. I've added a category to UIView with this method:
- (UIImage*)screenshot {
UIGraphicsBeginImageContext(self.frame.size);
[self.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
return viewImage;
}
When I look at the screenshot that is taken, it no longer has the rounded corners or the shadow behind my view. Why aren't they showing up?
