WIP: added option for gradient class selection

[ignatovSA]

Discussion started: #1

My example requires some refinement. Current realization doesn't support animating gradient's properties, so it's suitable only for static views.

Also, it's not very clear to me, how can we pass this CALayer subclass into generated code without overcomplicating it.

My proposal is:

• Add a possibility to specify linear gradient class name, by adding the parameter in options (Done)
• add a playground demonstrating sample usage (Todo)
• Update readme with links and motivation (Todo)

What do you think?

[artemnovichkov]

@ignatovSA, thank you for the PRs, they are really helpful!
About gradients. Is it an often task for implementing animatable gradient views? I guess code snippet for static views is enough
About code generation: in my opinion, we should generate the whole view with gradient sublayer. What do you think?
And about Playground with examples and README updating - good idea, I like it! We can add it in the final of gradient implementation

[artemnovichkov]

Hi, @ignatovSA! How are you? I have released 0.5.0 version with plenty of changes. Could you please give me a permission to changes? I'll help you with merge conflicts and the implementation.

[artemnovichkov]

I made a Playground example: LinearGradientPlayground.zip