Random Number Picker di App Store

number pickerNumber Picker. Pick. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29.I added a NumberPicker to my layout and debugged my app. Now I see that the NumberPicker doesn´t work, I can´t see any + or - button and also when I click on a number on my