1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25
26. 26
27. 27
28. 28
29. 29
30. 30
31. 31
32. 32
33. 33
34. 34
35. 35
36. 36
37. 37
38. 38
39. 39
40. 40
41. 41
42. 42
43. 43
44. 44
45. 45
46. 46
47. 47
48. 48
49. 49
50. 50
51. 51
52. 52
53. 53
54. 54

// было

-(BOOL)textFieldShouldReturn:(UITextField *)textField {
    
    if (textField == firstName) {
        [lastName becomeFirstResponder];
    }
    
    else if (textField == lastName) {
        [zip becomeFirstResponder];
    } 
    
    else if (textField == emailAdr) {
        [confirmEmailAdr becomeFirstResponder];
    }    
    else if (textField == confirmEmailAdr) {
        [zip becomeFirstResponder];
    }
    else if (textField == zip) {
        [street becomeFirstResponder];
    }
    else if (textField == street) {
        [city becomeFirstResponder];
    }
    else if (textField == city) {
        [telephonNumber becomeFirstResponder];
    }
    else if (textField == telephonNumber) {
        [wachtwoord becomeFirstResponder];
    }
  
    else{
        [textField resignFirstResponder];
    }
    
    
    return YES;
}

// решил заменить на ( при условии что все текстфилды протаганы от 1 до N):

-(BOOL)textFieldShouldReturn:(UITextField *)textField {

    int tag = textField.tag;
    
    UITextField* tf = (UITextField*)[self.scrollView viewWithTag:tag+1];
    
    if ( tf ) 
        [tf becomeFirstResponder];
    else 
        [textField resignFirstResponder];
    
    return YES;
}