How can I generate UML diagrams from Xcode4

I watched a video with xcode 3, that shows a button "Design" that displays a UML diagram, but I can't find how to do it with xcode 4.

Can you generate UML from code?

Umbrello is a free software tool that supports a code import feature that automatically generates UML Class diagrams from your imported code. Umbrello supports up to 20 languages between C, C++, Python, Javascript and Java.

How do you make a UML in Lucidchart?

Open a blank document or start with a template. Enable the UML shape library. On the left side of the Lucidchart editor, click "Shapes." Once you're in the Shape Library Manager, check "UML" and click "Save." From the libraries you just added, select the shape you want and drag it from the toolbox to the canvas.

Try Omnigraffle This has templates for UML diagrams.

If you drop an Xcode4 project file onto its dock icon, it will generate a UML diagram from that.

What it doesn't do is generate code from diagrams.