how to show the values on label same untill the app quits

Question

I have label in which i am loading the text value in viewDidLoad and i am changing that value on button click i want the value changed on button clicked to be remain same in the label untill we again click the label but when i move to next screen and comeback to original then again it shows the value is which is set in viewDidLoad not the changed values.

   -(void)viewDidLoad{

    testLabel.text=@"This is fine";


   }

  -(void)changeData{

    testLabel.text=@"changed data";

   }     



    -(IBAction)riskButtonAction{

   RiskViewController*targetContrlloer=[[RiskViewController alloc] init];
   [self.navigationController pushViewController:targetContrlloer animated:YES];

   }

Answer 1

try below code

 -(void)viewWillAppear:(BOOL)animated
    {
       NSString *checkFb=[[NSUserDefaults standardUserDefaults] valueForKey:@"someKey"];
       if(checkFb.lenght > 0)
       { 

        testLabel.text=checkFb;
        }

    }


   -(void)changeData{

      testLabel.text=@"changed data";
    [[NSUserDefaults standardUserDefaults] setObject: testLabel.text forKey:@"someKey"];
    [[NSUserDefaults standardUserDefaults] synchronize];


   }    

let me know it is working or not!!!