Adding border around an UIImage - ios

Question

I am using below code to add text and border to selected image from cameraroll.
-(UIImage*)image:(UIImage*)image withText:(NSString*)text atPoint:(CGPoint)point{
if (text) {
CGRect rect = CGRectMake(0, 0, image.size.width, image.size.height);
UIGraphicsBeginImageContextWithOptions(rect.size, NO, 0);
[image drawInRect:rect];
NSDictionary *attributes = #{NSFontAttributeName : [UIFont boldSystemFontOfSize:80],
//NSStrokeWidthAttributeName : #(4),
NSStrokeColorAttributeName : [UIColor whiteColor]};
[text drawAtPoint:point withAttributes:attributes];
CALayer *l = [self.imageView layer];
[l setBorderWidth:10.0];
[l setBorderColor:[[UIColor blueColor] CGColor]];
newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
}
return newImage;
}
When i click on save button in my app, i am saving edited image to cameraroll.But edited image inside cameraroll only has text without any added border. Whether i am missing anything in above code to add and save border around image? Is there any other way to add border other than CALayer?

Answer 1

Replace this:
CALayer *l = [self.imageView layer];
[l setBorderWidth:10.0];
[l setBorderColor:[[UIColor blueColor] CGColor]];
With this:
UIBezierPath *rectangleBezier = [UIBezierPath bezierPathWithRect:rect];
rectangleBezier.lineWidth = 20.0f; // 10 * 2 because line drawn from the center of edge
[[UIColor blueColor] setStroke];
[rectangleBezier stroke];
Remarks:
CALayer *l = [self.imageView layer]; has nothing to do with UIImage data. imageView's layer change imageView presentation. Not the content of UIImage.

Answer 2

I will respond to "Adding a border around an UIImage in a UIView"
From far, the easiest method is to insert another view in the view hierarchy.
[self.view insertSubview:({
UIView * border = [[UIView alloc]
initWithFrame:CGRectInset(self.imageView.frame, -1, -1)];
border.backgroundColor = [UIColor blueColor];
border;
})
belowSubview:self.imageView];