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Is there anybody out there who could help me with a problem? I'm helping a friend with a game and we're stuck on how to overwrite an existing integer. The problem is with Objective-C in xCode.

There are two viewControllers frontPage and secondPage. In the frontPage we assign 100 to the startingScore in the viewDidLoad method. Then we go out to the secondPage and from the secondPage we come back. We want to use the startingScore from the secondPage in frontPage, but it's getting overwritten with viewDidLoad.

This is what we have from frontPage (or first View Controller):

- (void)viewDidLoad
{
    startingScore = 100;
    mylabel1.text = [NSString stringWithFormat:@"%d", startingScore];
    [super viewDidLoad];
// Do any additional setup after loading the view.
    NSLog(@"Current value of newscore is: %d",startingScore);

}

This the code from the SecondViewController:

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    frontPage *destination = [segue destinationViewController];
    destination.startingScore = 5000;
    destination.mylabel2.text = [NSString stringWithFormat:@"%d", destination.startingScore];
    NSLog(@"Current Value of destination.newscore is: %d",destination.startScore);  
}

Can anybody help me?

Thanks,

Sam x.

rmaddy
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user3162972
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  • Hi.. can you please show us how you declared startingScore? – Prince Agrawal Jan 05 '14 at 17:10
  • Hi, sure this is from the frontPage viewController files: property (nonatomic) int startingScore; .h file and from the .m file: synthesize startingScore; Thanks, – user3162972 Jan 05 '14 at 17:18
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    This will be a lot easier to manage if you move your data model out of your view controller. Make a separate class to track the score, and have your owe controller retrieve & display the score. – Aaron Brager Jan 05 '14 at 17:19

2 Answers2

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If you want startingScore to be set to 100 when the frontPage view controller is first created and managed elsewhere from then on, you can move initialization of startingScore into your init function:

- (id)init
{
    if(self = [super init]) {
        // ...
        startingScore = 100;
    }
    return self;
}
godel9
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0

I think I got the clue. Here you are changing value of startingScore 2 times. First you are setting its value to 500 in viewDidLoad . Then you are changing from 500 to 5000 in -(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender method. Now when you are coming back to frontpage, the viewDidLoad method is being called again for frontPage. so value of startingscore is again turning into 500. You can check it by using NSLog function. I am pretty sure that's what happening here.

Suggestions to rectify the problem

  1. Initiate startingScore in init of frontPage
  2. Manage startingScore from another class.

Edit Just paste code written below in VC of your FrontPage & remove startingScore = 500; from your viewDidLoad Method

- (id)init
{
    if(self = [super init])
 {
        startingScore = 500;
    }
    return self;
}
Prince Agrawal
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