Class variables outside of method scope?

Question

Hey guys,
I have 3 text fields. 2 are meant for input and 1 for output. I want to take the float values from the 2 input text fields and do some math on them and then output the results in the output text field. Heres the problem, I need to make sure that both the text fields have some value stored in them. Well, that's not the problem, the problem is that the method only seems to be able to check the 'textField' parameter thats passed into the method pasted below. Whenever I try to run checks on the textfield class variables specifically, it doesn't seem to pick up on any of the text field's value changes or anything... Any ideas?
I have the following:
- (void)textFieldDidEndEditing:(UITextField *)textField {
if([heightText.text length] > 0 && [weightText.text length] > 0) {
bmiText.text = @"hi";
else if([textField.text length] > 0) {
bmiText.text = @"atleast this works";
else {
bmiText.text = @"";

Answer 1

Here is the .h file:
@interface BMIViewController : UIViewController {
//...some other variables
UITextField *heightText;
UITextField *weightText;
@property (nonatomic, retain) UITextField *heightText;
@property (nonatomic, retain) UITextField *weightText;
Here is the .m file:
@implementation BMIViewController
@synthesize weightText, heightText;
//...some code...
- (void)textFieldDidEndEditing:(UITextField *)textField {
if([heightText.text length] > 0 && [weightText.text length] > 0) {
bmiText.text = @"hi";
else if([textField.text length] > 0) {
bmiText.text = @"atleast this works";
else {
bmiText.text = @"";