I used this method to change choosing Text Field
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
if ([textField isEqual:self.emailRegisterTextField]) {
[self.usernameRegisterTextField becomeFirstResponder];
} else if ([textField isEqual:self.usernameRegisterTextField]) {
[self.passwordRegisterTextField becomeFirstResponder];
} else {
[textField resignFirstResponder];
// To click button for registration when you clicking button "Done" on the keyboard
[self createMyAccount:self.registrationButton];
}
return YES;
}