Question

i am having a problem with my application,.i have this code in my mainviewcontroller viewdidload method to check weather the application launch for the first time

NSUserDefaults      *padFactoids;
int                 launchCount;

padFactoids = [NSUserDefaults standardUserDefaults];
launchCount = [padFactoids integerForKey:@"launchCount" ] + 1;
[padFactoids setInteger:launchCount forKey:@"launchCount"];
[padFactoids synchronize];

NSLog(@"number of times: %i this app has been launched", launchCount);

if ( launchCount == 1 )
{

    NSLog(@"this is the FIRST LAUNCH of the myBibleapp");
    // do stuff here as you wish




    UIScrollView_PagingViewController *detailViewController = [[UIScrollView_PagingViewController alloc] initWithNibName:@"UIScrollView_PagingViewController" bundle:nil];

    //detailViewController.firstString = firstString;
    // ...
    // Pass the selected object to the new view controller.

    [self.navigationController pushViewController:detailViewController animated:YES];

    [detailViewController release];

}
if ( launchCount == 2 )
{
    // do stuff here as you wish

            NSLog(@"this is the SECOND launch of the myBibleapp");
    // do stuff here as you wish

}

if the app launch for the first time it will go to the UIScrollView_PagingViewController page,or stay in the mainviewcontroller,my problem is i need to unhide a tick image in the maincontroller to statsfy some conditions when the app is launched for the first time.that menz tickimage.hidden = NO; ,i put this in first condition but i am getting nothing unhide from the code.how to do this.
Thanks in advance.

Answer 1

First of all, you need to learn how to use breakpoints and debugging techniques in XCode. I suggest you go and read up on them first…..

… Back already? Good. I hope you understand those concepts now. Here’s what you need to do

1. Set a breakpoint on padFactoids = [NSUserDefaults standardUserDefaults];
2. Step through and examine the value of padFactoids and launchCount.
3. Is padFactoids a valid object? Is launchCount the value you expected?
4. If either of these are incorrect, then examine your code to see where you may have gone wrong. Check with the Apple SDK documentation for the methods you are calling.
5. Your app works!