Launching safari with an image or saving to camera roll issues - ios

Question

I've downloaded an image from a web service and either need to open the image within safari or save it to the camera roll. I've tried to open the image in Safari, but safari doesn't open.
var safari = UIApplication.SharedApplication;
var uri = new NSUrl(path); // where the image is saved to
safari.OpenUrl(uri);
This compiles, but Safari doesn't launch
The code I have for saving to the camera roll is this
PHPhotoLibrary.SharedPhotoLibrary.PerformChanges(() =>
{
using (var pool3 = new NSAutoreleasePool())
{ pool3.InvokeOnMainThread(delegate ()
{ PHAssetChangeRequest.FromImage((UIImage)UIImage.FromFile(path));
});
}
}, (t, err) =>
{
if (!t)
{
using (var pool1 = new NSAutoreleasePool())
{
pool1.InvokeOnMainThread(delegate () {
var alert = new UIAlertView("Error saving file", "An error has occured saving your photo to the camera roll", null, "OK");
alert.Show();
};
}
else
{
using (var pool2 = new NSAutoreleasePool())
{
pool2.InvokeOnMainThread(delegate (){
var alert = new UIAlertView("Image saved", "Your image has been saved to the camera roll", null, "OK");
alert.Show();
});
};
}
});
which crashes and burns (the correct permissions have been set)
I'm at a loss as to why neither of these work as they seem to be correct.

Answer 1

You can't open a local path with safari, that isn't allowed on iOS (apps are sandboxed) so you'll need to use either a remote URL or have your own UIWebView or WKWebView or a SFSafariViewController to display that image in a safari like experience. Here is a blog post in the Xamarin Site about the subject.
Also here is a nice recipe in the Xamarin site to save a photo into the camera roll, you can do your own solution based on it.
Hope this helps!