Question

I know this has been asked many times, but I cant find answer to my problem.

I want to extract a string variable from another file.

I wrote such:

NSMutableString *universalString; in AppDelegate.m

I import this string in MainViewController.m:

extern NSMutableString *universalString;

In

`- (void)tableView:(UITableView *)tableView1 didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

    [tableView1 deselectRowAtIndexPath:indexPath animated:NO];

    TestViewController *viewCon = [[TestViewController alloc]initWithNibName:@"viewCon" bundle:nil];

    [self.navigationController pushViewController:viewCon animated:YES];        
    [viewCon release];

`universalString = [self.array objectAtIndex:indexPath.row];

}`

In TestViewController.m, also extern NSMutableString *universalString;

- (void)viewDidLoad {


    UITextView *newtextview = [[UITextView alloc] initWithFrame: CGRectMake(10, 10, 200, 200)];
    newtextview.backgroundColor = [UIColor blackColor];

    [newtextview setTextColor:[UIColor whiteColor]];    
    newtextview.text = universalString;

    [self.view addSubview:newtextview];
    [newtextview release];
}

I want to extract this universalString from MainViewController., but nothing happens until I click twice forth and back through, then this universalString appear in TestViewController.m.

What did I do wrong?

Answer 1

Ok I found a little bit of code in my email, you should hopefully be able to apply it:

What you have to do is create an app delegate with universalString set up as a property. Include it in both view controllers, and use the following to set/get it.

NamedAppDelegate* navigationDelegate = (NamedAppDelegate *)[[UIApplication sharedApplication] delegate];

newtextview.text = navigationDelegate.universalString; //get
navigationDelegate.universalString = "string"; //set

Again, I’m a bit rusty(and can’t check my own source code because I don’t have access anymore), I hope this is enough for you to be able to apply it.