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这里我在 Img 中获取图像但显示 nil 但是当我在 imageview 中打印图像的大小或显示图像（Img）时，我也在 imageview 中获取它的大小和图像，然后当我传递图像的大小（Img）在渲染器中，问题是渲染器是 nil 我也尝试打印日志，但它得到 Null 的帮助将不胜感激

我的代码：

UIImage* Img =_myimage;

UIImageView * imageview = [[UIImageView alloc]initWithImage:Img];

// 我得到的渲染器在 IOS 9.3 中是 nil

UIGraphicsImageRenderer * renderer = [[UIGraphicsImageRenderer  alloc] initWithSize:_myimage.size];

// CGSize size=CGSizeMake(Img.size.width,Img.size.height)



   NSLog(@"renderer %@",renderer);
        UIBezierPath *Path;
        Path = [UIBezierPath bezierPath];
        Path.contractionFactor = 0.8;
        NSValue *mvalue = [_pointsarray objectAtIndex:0];
        CGPoint mp2 = [mvalue CGPointValue];
        [Path moveToPoint:mp2];
        [Path addBezierThroughPoints:_pointsarray];
        [Path closePath];
        Path.lineWidth = 2;
    CAShapeLayer*shapeLayer = [CAShapeLayer new];
    shapeLayer.path=Path.CGPath;

    [shapeLayer setFillColor:[UIColor redColor].CGColor];
    [shapeLayer fillColor];

    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:@7 forKey:@"inputRadius"];

    CIImage * blurredCIImage = [gaussianBlurFilter valueForKey:kCIOutputImageKey];
    UIImage * blurredImage = [UIImage imageWithCIImage:blurredCIImage];

[self.view addSubview:imageview];
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