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i want to crop image in my iPhone app using any close path like UIBezierPath. i know it is possible using rectangle but i want crop in different shape. like i make one shape using touch and want to crop that image so how it is possible. any suggestion or help. Thanks in advance.

Gaurav Thummar
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    I never did before but I suppose you need to use mage masking. Try read this apple Doc [Quartz 2D Programming Guide](https://developer.apple.com/library/ios/documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_images/dq_images.html#//apple_ref/doc/uid/TP30001066-CH212-CJBDIJEE). Maybe you could create a transparent image with bezierPath programmatically or by user interaction and then use this image as mask for your original image. – Gabriele Aug 18 '12 at 01:17
  • Masking is the way to got. Have a look at this short example http://mobiledevelopertips.com/cocoa/how-to-mask-an-image.html – mgratzer Aug 20 '12 at 06:08

3 Answers3

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You can crop your image with a shapelayer. To do it you have to create a path that will be used as borders for your new image. You should look at this question.

CALayer* contentLayer = [CALayer layer];
[contentLayer setFrame:CGRectMake(0, 0, 80, 80)];
CAShapeLayer* mask = [CAShapeLayer layer];

CGMutablePathRef path = CGPathCreateMutable();

CGPathMoveToPoint(path, NULL, 10, 10);
CGPathAddLineToPoint(path, NULL, 10, 80);
CGPathAddLineToPoint(path, NULL, 80, 80);
CGPathAddLineToPoint(path, NULL, 80, 10);
mask.path = path;

[contentLayer setContents:(id)[[UIImage imageNamed:@"image.png"] CGImage]];
[contentLayer setMask:mask];          

[[self layer]addSublayer:contentLayer];

Something like this.

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Vitalii Boiarskyi
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1

you can accomplish this using a mask. you can create a mask using CGImageMaskCreate.

if you need examples:

Any idea why this image masking code does not work?

http://mobiledevelopertips.com/cocoa/how-to-mask-an-image.html

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justin
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0

// In Code Use:

  -(UIImage *)croppedImage

{
   UIImage *myImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();
[self.bezierPath closePath];

CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 0.0, 0.0,   0.0, 0.0);
_b_image = self.bg_imageview.image;

CGSize imageSize = _b_image.size;
CGRect imageRect = CGRectMake(0, 0, imageSize.width, imageSize.height);

UIGraphicsBeginImageContextWithOptions(imageSize, NO, [[UIScreen mainScreen] scale]);
[self.bezierPath addClip];
[_b_image drawInRect:imageRect];
UIImage *croppedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return croppedImage;}
Ramani Hitesh
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