osx - Cannot add more elements to NSSegmentedControl -

I have this built on the NSSegmentedControl interface builder and saved on a xib file. There are initially 4 sections in control.

If I use it

  [self.myControl setSegmentCount: 6];  

Increasing the number of segments to 6, programmatically, this will not work, but if I

  [self.myControl setSegmentCount: 2]; To reduce the number of segments,  

, it works.

After that, I return the number of segments to 4, it works, but I can not pass it on the interface builder, the number of defined sections.

Any clues?

Select a segment in the interface builder and add the layout deficiency and the right hand side to prevent clipping Click on the small ruler in the sidebar