iOS 9.3 UIGraphicsImageRenderer showing nil any other option for this? - objective-c

Question

I'm want apply feather effect to the image when cropped but want i render the image using UIGraphicsImageRenderer the render is nil(iOS 9.3) is there any other option for rendering the image in iOS 9.3
This is my code:
UIImage* Img = _myimage;
UIImageView * imageview = [[UIImageView alloc]initWithImage:Img];
[imageview setFrame:CGRectMake(0, 0, Img.size.width, Img.size.height)];
UIBezierPath *aPath;
CAShapeLayer *shapeLayer;
aPath = [UIBezierPath bezierPath];
aPath.contractionFactor = 0.8;
NSValue *mvalue = [_pointsarray objectAtIndex:0];
CGPoint mp2 = [mvalue CGPointValue];
[aPath moveToPoint:mp2];
[aPath addBezierThroughPoints:_pointsarray];
[aPath closePath];
aPath.lineWidth = 2;
shapeLayer = [CAShapeLayer new];
shapeLayer.path=aPath.CGPath;
[shapeLayer setFillColor:[UIColor redColor].CGColor];
[shapeLayer fillColor];
//Here the Renderer is nil in iOS 9.3
UIGraphicsImageRenderer * renderer = [[UIGraphicsImageRenderer alloc] initWithSize:Img.size];
UIImage *shapeImage = [renderer imageWithActions:^(UIGraphicsImageRendererContext * _Nonnull context)
{
[shapeLayer renderInContext: context.CGContext];
}];
CIImage * shapeCimage = [[CIImage alloc] initWithImage:shapeImage];
CIFilter * gaussianBlurFilter = [CIFilter filterWithName: #"CIGaussianBlur"];
[gaussianBlurFilter setValue:shapeCimage forKey: #"inputImage"];
[gaussianBlurFilter setValue:#8 forKey:#"inputRadius"];
CIImage * blurredCIImage = [gaussianBlurFilter valueForKey:kCIOutputImageKey];
UIImage * blurredImage = [UIImage imageWithCIImage:blurredCIImage];
UIImageView *maskedImageView = [[UIImageView alloc]initWithImage:blurredImage];
maskedImageView.contentMode = UIViewContentModeScaleAspectFit;
maskedImageView.frame = imageview.frame;
imageview.layer.mask=maskedImageView.layer;
[self.view addSubview:imageview];

Answer 1

UIGraphicsImageRenderer is not available in iOS 9. If you need to target this, you can easily write your own like that:
+(instancetype)LT_imageByDrawingOnCanvasOfSize:(CGSize)size usingBlock:(LTImageDrawingContextBlock)block
{
UIGraphicsBeginImageContextWithOptions(CGSizeMake(size.width, size.height), NO, 0.0);
CGContextRef context = UIGraphicsGetCurrentContext();
block( context );
UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return theImage;
}