how to use a variable in another part of the code?

Question

`- (void)viewDidLoad{
   [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSInteger *pushUpCount;
 }

`- (IBAction)imPressed:(id)sender {
   NSInteger pushUpCount = pushUpCount + 1;
   NSString *strPushUp = [NSString stringWithFormat:@"%d", pushUpCount];
   NSLog(strPushUp);
   }

No my problem is that it says that the pushUpCount is not declared. So I was wondering how could I make this "public", so that all of the of the functions or IBActions can use this variable. I know what the problem is I don't know how to fix it.

CODE EXPLANATION All I'm doing here is setting the variable to 0. Before the user does anything. Then each time the button is pressed it will add 1 to the existing number. then I will change the text of a NSTextField to the number but I know how to do that.(or I think I do at least).

So my basic question is..... How can I reuse a variable in another function or IBAction

Thanks in advance.

Andrey Chernukha · Accepted Answer · 2014-06-07 17:08:02Z

2

Make this variable a member of your class. I.e. declare it inside @interface section and assign it 0 inside viewDidLoad just like this: pushUpCount = 0;
Don't use it as a pointer (i'm pretty sure it's not what you need). Declare it NSInteger pushUpCount; instead of NSInteger *pushUpCount;
Inside imPressed just increment it pushUpCount++;

In order to make sure you understand everything i'll explain it very simple:

Your @interface section in YourViewController.h file should contain declaration of the variable:

@interface YourViewController : UIViewController
{
    NSInteger pushUpCount;
}
@end

Now your code looks like:

- (void)viewDidLoad{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
  pushUpCount = 0;
}

 - (IBAction)imPressed:(id)sender {
pushUpCount++;
NSString *strPushUp = [NSString stringWithFormat:@"%d", pushUpCount];
NSLog(strPushUp);
 }

edited Jun 7, 2014 at 17:08

answered Jun 7, 2014 at 16:53

Andrey Chernukha

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3 Comments

ruthless Over a year ago

I don't really under stand what you mean but I changed It and I get the pointer(at least I think its the pointer of the variable) printed out in the NSLOG. I have updated my question could you explain it more.

Andrey Chernukha Over a year ago

What exactly you can't get?

ruthless Over a year ago

never mind you updated your answer and it helped me a lot. I get what you did thank you.

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