CODEWITHSUNDEEP
iphoneobjective-cclassnsstring
Claudio
Claudio

Reputation: 173

Problem with access to string from another class

Hi i have two view controller: FirstViewController and SecondViewController

FirstViewController.h

#import <UIKit/UIKit.h>

@interface FirstViewController: {
 NSString *prStr;
  } 

 -(IBAction)setString;
 @property (nonatomic, retain) NSString *prStr;

 @end

 FirstViewController.m

 #import"FirstViewController.h"

 @implementation FirstViewController

 @synthesize prStr;

 -(IBAction)setString{
  prStr = [[NSString alloc]initWithFormat:@"1"];

   }

 SecondViewController.h

#import <UIKit/UIKit.h>

@class FirstViewController;

@interface SecondViewController: {
 FirstViewController *pr;
  } 

 -(IBAction)example;
 @property (nonatomic, retain) FirstViewController *pr;

 @end

 SecondViewController.m

 #import"SecondViewController.h"
 #import "FirstViewController.h"

 @implementation SecondViewController

 @synthesize pr;

 -(IBAction)example{
  NSLog(pr.prStr);
  if([pr.prStr isEqualToString:@"1"]==YES){

     //Do Something            }

   }

When i build and run app, at execution of IBAction example, on debugger console doesn't appear anything!! How can access to the string of FirstViewController from action of SecondViewController, in order to display it on the debugger console???

Upvotes: 1

Views: 625

Answers (3)

KingofBliss
KingofBliss

Reputation: 15115

First problem is that you haven't alloced it. Even if you alloc that, you should alloc as a singleton object.

Upvotes: 1

EXC_BAD_ACCESS
EXC_BAD_ACCESS

Reputation: 2707

U allocate the memory for that object(pr) and try it out.

Upvotes: 0

38leinaD
38leinaD

Reputation: 93

In your example, you never actually call setString, so the value is not actually set.

Except from that, i think it is just not good practive to use a propertie's getter directly as an IBAction (even though IBAction is equivalent to void)

Upvotes: 1

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