I need to support starting a sketch programmatically with a GPS point, not just tapping the screen. How do I do that for line and polygon layers?
AGSSketchEditor.replaceGeometry works for point layers only.
AGSSketchEditor.insertVertexAfterSelectedVertexWithPoint works if your sketch has at least one point already.
AGSSketchEditor.startWithGeometry fails if you pass in a polyline or polygon that just has one vertex.