Rotate An Image

PDF for offline use
Sample Code:
Related Articles:
Related SDKs:

Let us know how you feel about this

Translation Quality


0/250

This recipe shows how to rotate an image on the screen using a UIImageView and a CGAffineTransform.

Recipe

  1. Add a sample image named monkey.png.
  2. In a UIViewController subclass, add class variables for a UIImage and UIImageView.
UIImage _image;
UIImageView _imageView;
  1. In the ViewDidLoad method create the UIImage and the UIImageView.
_image = UIImage.FromFile("monkey.png");
_imageView = new UIImageView(new CGRect(50,50,100,100));
_imageView.ContentMode = UIViewContentMode.ScaleAspectFit;
_imageView.Image = _image;
  1. Set the Transform property of the UIImageView and add it as a sub view.
_imageView.Transform = CGAffineTransform.MakeRotation((float)Math.PI/4);
View.AddSubview (_imageView);

Additional Information

The CGAffineTransform has helper functions to return various affine transforms such as rotation, scale and translation. Setting a CGAffineTransform to the Transform property of a UIView applies the transformation matrix to the view.

Xamarin Workbook

If it's not already installed, install the Xamarin Workbooks app first. The workbook file should download automatically, but if it doesn't, just click to start the workbook download manually.