Calling NSString in another void method issue

Question

I am trying to call NSSting into a void method but I am getting EXC_BAD_ACCESS Error. What would be causing this?

I have made a brakepoint(debug) to NSLog in btnPickerDoneTouchHandler but choiceList is empty.

.H:

@interface controlView : UIViewController{
      NSString *choiceList;
}

.M:

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{

    return 1;
}

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{

    return [res count];
}



-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{

    return [[res objectAtIndex:row]objectForKey:@"choice_name"];   
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
      choiceList = [NSString stringWithFormat:@"<r_PM act='closepos_choice' cl_choice='%d'/>", row];

      NSLog(@"You have selected row %@", choiceList);
}


- (void)btnPickerDoneTouchHandler{
      //I have put here the brakepoint.
      NSLog(@"choiceList is %@", choiceList);
}

Answer 1

Try this -

In your .h file

@property (strong, nonatomic) NSString  * choiceList;

In your .m file

@synthesize choiceList;

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
  self.choiceList = [NSString stringWithFormat:@"<r_PM act='closepos_choice' cl_choice='%d'/>", row];

  NSLog(@"You have selected row %@", self.choiceList);
}


- (void)btnPickerDoneTouchHandler{
    //I have put here the brakepoint.
    NSLog(@"choiceList is %@", self.choiceList);
}