如何避免从照片库中选择或从ios中的相机中捕获的图像的背景？

Question

I need to get only the selected image without background , we are trying to avoid the back ground and we need selected part should only cropped. and how to change the pixel data on tap selection of image color.

OR can we do like this:

Before crop:

After crop:

Answer 1

You can allow user to draw on image after selection using bezierpath, once you have path - You can use a shapeLayer for that. Something like:

CAShapeLayer *shapeLayer = [CAShapeLayer layer]; 

shapeLayer.path = aPath.CGPath;

[view.layer setMask:shapeLayer];//or make it as

[imageview.layer setMask:shapreLayer]; 

// and add imageView as subview  of whichever view you want. 
// draw the original image on the imageview in that case

To get it as an image,

UIGraphicsBeginImageContext(view.bounds.size);
[view.layerrenderInContext:UIGraphicsGetCurrentContext()]; 

UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();