public override void ViewDidAppear(bool animated)
{
base.ViewDidAppear (animated);
this.View.BackgroundColor = UIColor.LightGray;
txtQR = new UITextView (new RectangleF (20, 100, this.View.Bounds.Width - 40, 100));
txtQR.Text = "Xamarin rocks!";
this.View.AddSubview (txtQR);
btnQR = new UIButton (UIButtonType.RoundedRect);
btnQR.Frame = new RectangleF (100, 225, this.View.Bounds.Width - 200, 30);
btnQR.SetTitle ("Create Code", UIControlState.Normal);
qrImageView = new UIImageView (new RectangleF (20, 275, 100, 100));
this.View.AddSubview (qrImageView);
btnQR.TouchDown += (object sender, EventArgs e) => {
var gen = new CIQRCodeGenerator ()
{
Message = NSData.FromString (txtQR.Text),
CorrectionLevel = "M"
};
var context = CIContext.FromOptions (null);
var cgimage = context.CreateCGImage (gen.OutputImage, gen.OutputImage.Extent);
qrImageView.Image = UIImage.FromImage (cgimage);
};
this.View.AddSubview (btnQR);
}
/// <summary>
/// Generates a QR code.
/// </summary>
/// <returns>An image with the code.</returns>
CIImage QRCodeGenerator ()
{
var qr_code_generator = new CIQRCodeGenerator ()
{
Message = NSData.FromString ("http://xamarin.com"),
CorrectionLevel = "M",
};
return qr_code_generator.OutputImage;
}
