How to remove square ratio cropping for images on IOS

I am using the IOS standard image cropping functionality (move and scale) to crop my image before submitting it to the server. However, I realize that the cropping provided has a square ratio (see screenshot below) Snippet of the code is as follows: ``` //set up image picker self.imgPicker = [[[UIImagePickerController alloc] init]autorelease]; self.imgPicker.allowsEditing = YES; self.imgPicker.delegate = self; //Trigger get photo from library function self.imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; [self presentModalViewController:self.imgPicker animated:YES]; ``` How can allow 'move and scale' editing and at the same time allow the user to do cropping WITHOUT the square ratio restriction?