Question: As the `IBDesignable` attribute needs the designable class to be in a seperate target I created a second target which worked great in the designer. When I then tried to use the new class in my code I get the error 

> 
> "Use of unresolved identifier 'CustomMarker'"
> 
> 
> 

I have imported the second target in my main target -- `import CustomViews` -- and I can cmd+click the target name to see the main .h file that describes the target; where the class is included. The compiler still can't find the class in my code though. 

Any thoughts?

Answer: 
I had the same issue. Fixed this by changing access modifier of the class to ***public***. 

```
@IBDesignable public class MyCustomView: UIView {

}

```

By default classes and methods will be at `internal` access level. If you want to use that out side of the target, you should mark it as `public`. Then only it will be the part of public interface(visible to outside of target)
second target must be of type "framework". 
you must also link it in build phases like as an external framework. link binary with libraries must have a link to your customViews framework and embed framework must have that link too. 

that should be enough.