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iOS

Posted by Jack Ryder
Jack Ryder
7,286 Points

How would i crop an image received from the Camera?

I've looked elsewhere but everything is either too confusing or not working, I am getting an image from the camera and displaying it in an imageView. I just want to crop the original image to 320x320, a square in the middle, kind of like instagram.

here's my code:

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
        //a photo was taken/selected!
        self.image = [info objectForKey:UIImagePickerControllerOriginalImage];

        if (self.imagePicker.sourceType == UIImagePickerControllerSourceTypeCamera) {
            // save the image
            UIImageWriteToSavedPhotosAlbum(self.image, nil, nil, nil);


            self.imageView.image = self.image;
            CGRect frame = self.imageView.frame;
            self.imageView.frame = frame;
            [self.view addSubview:self.imageView];

        }
        [self dismissViewControllerAnimated:YES completion:nil];
    }
}

thanks!

1 Answer

Jack Ryder
Jack Ryder
7,286 Points

Solved!

            CGSize imageSize = self.image.size;
            CGFloat width = imageSize.width;
            CGFloat height = imageSize.height;
            if (width != height) {
                CGFloat newDimension = MIN(width, height);
                CGFloat widthOffset = (width - newDimension) / 2;
                CGFloat heightOffset = (height - newDimension) / 2;
                UIGraphicsBeginImageContextWithOptions(CGSizeMake(newDimension, newDimension), NO, 0.);
                [self.image drawAtPoint:CGPointMake(-widthOffset, -heightOffset)
                         blendMode:kCGBlendModeCopy
                             alpha:1.];
                self.image = UIGraphicsGetImageFromCurrentImageContext();
                UIGraphicsEndImageContext();
            }