saving NSString and then reading it back

Hey all, this should be a simple task but for some reason i am making it harder... I am try开发者_如何学Pythoning to save some text from an XML file to a NSString. But when i debug it, the string says "Out of scope".

Here is my code:

in my .h file:

 @interface RootViewController : UIViewController<MBProgressHUDDelegate> {
     NSString *thePW;   
 }

and my .m file:

 NSString *thePW;
 ...
 - (void)viewDidLoad {
 ...
    if(e == nil){
        NSString *response = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

        thePW = response; // <-- this is where it has "Out of scope"
        [response release];
    }
 }

 - (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
 {
     if (buttonIndex != [alertView cancelButtonIndex])
     {
        if (thePW == @"0000")
        {
           NSLog(@"correct!");
        }
     }
 }

---

You may also try:

thePW = [NSString stringWithFormat:@"%@",response];   // to assign the string value.

and while comparing strings:

(thePW isEqualToString @"0000")

---

Drop the redeclaration of thePW in your .m file

Also, if you want to keep the value of response in thePW be sure to retain it as well.