UIPickerView and UITextFields problems - objective-c

Question

I have multiple textFields. In one of them, i want to display a UIPickerView.
I did it this way:
-(void)showPicker{
[subject becomeFirstResponder];
actionSheet = [[UIActionSheet alloc] initWithTitle:nil
delegate:nil
cancelButtonTitle:nil
destructiveButtonTitle:nil
otherButtonTitles:nil];
[actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];
CGRect pickerFrame = CGRectMake(0, 40, 0, 0);
picker = [[UIPickerView alloc] initWithFrame:pickerFrame];
picker.showsSelectionIndicator = YES;
picker.dataSource = self;
picker.delegate = self;
[actionSheet addSubview:picker];
[picker release];
UISegmentedControl *closeButton = [[UISegmentedControl alloc] initWithItems: [NSArray arrayWithObject:#"Close"]];
closeButton.momentary = YES;
closeButton.frame = CGRectMake(260, 7.0f, 50.0f, 30.0f);
closeButton.segmentedControlStyle = UISegmentedControlStyleBar;
closeButton.tintColor = [UIColor blackColor];
[closeButton addTarget:self action:#selector(dismissActionSheet) forControlEvents:UIControlEventValueChanged];
[actionSheet addSubview:closeButton];
[closeButton release];
[actionSheet showInView:[[UIApplication sharedApplication] keyWindow]];
[actionSheet setBounds:CGRectMake(0, 0, 320, 485)];
}
-(void)dismissActionSheet{
[actionSheet dismissWithClickedButtonIndex:0 animated:YES];
}
When i close it, the sheet is being dismissed, but the keyboard on the subject textField appears.
Now:
How can i do to not to show the keyboard on that subject textField?
Here is where i resign the keyboard:
- (void) resignKeyboard:(id)sender{
if ([name isFirstResponder])
[name resignFirstResponder];
else if ([email isFirstResponder])
[email resignFirstResponder];
else if ([message isFirstResponder])
[message resignFirstResponder];
else if ([subject isFirstResponder]) {
[subject resignFirstResponder];
}
}

Answer 1

Use UItextField delegates: For that u need add #interface YourViewController :UIViewController
If UItextField taken from xib by right clicking add its delegate to fileowner
Now use this method in code:
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
if(textField == subject)
{
return NO;
}
return YES;
}

Answer 2

It is possible to prevent the keyboard from popping up.
Firstly set your class as the delegate of UITexfield
textField.delegate = self
In your Interface Declaration add:
<UITextFieldDelegate>
Now implement textFieldShouldBeginEditing::
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
// Show UIPickerView
return NO;
}

Answer 3

Solved by using a transparent button which handles the action to show the picker. The "subject" textField was disabled.