How to crop the image in iPhone

Question

I want to do the same thing as asked in this question. In my App i want to crop the image like we do image cropping in FaceBook can any one guide me with the link of good tu

Answer 1

CGRect rectImage = CGRectMake(p1.x,p1.y, p2.x - p1.x, p4.y - p1.y);

//Create bitmap image from original image data,
//using rectangle to specify desired crop area

CGImageRef imageRef = CGImageCreateWithImageInRect([imageForCropping CGImage], rectImage); 
UIImage *croppedImage = [UIImage imageWithCGImage:imageRef]; 
imageView1 = [[UIImageView alloc] initWithFrame:CGRectMake(p1.x, p1.y,p2.x-p1.x p4.y-p1.y)];
imageView1.image = croppedImage;
[self.view addSubview:imageView1];
CGImageRelease(imageRef);