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In the current binding:
var f = (UIGraphicsImageRendererFormat) UIGraphicsImageRendererFormat.DefaultFormat;
throws an InvalidCastException but in Swift:
var s = UIGraphicsImageRendererFormat.default()
I think the subtypes of UIGraphicsRendererFormat need to 'new' the DefaultFormat property and have it return an instance of the subtype.
It looks like it. It's not clear, at least I did not find documentation beside the headers, but UIGraphicsRenderer is abstract
> An abstract base class for creating graphics renderers. Do not use this class directly.
> NS_CLASS_AVAILABLE_IOS(10_0) @interface UIGraphicsRenderer : NSObject
and I suspect its sibling types, UIGraphicsRendererFormat and UIGraphicsRendererContext, should also be abstract.
Not sure enough about UIGraphicsRendererFormat and UIGraphicsRendererContext as they seems to work... but UIGraphicsRenderer was made abstract.
Both subclasses of UIGraphicsRendererFormat also redefine (new) the static property so they return `instancetype`
Fixed in xamarin-macios/xcode8 f63ecd7a21161bae43e162114cbd6e14dda8fc4e
Verified with XI 18.104.22.168