Question

Am very new to iPhone application development. Am adding the events to iCal from my iphone app. The user can add multiple events at a time to iCal from the app. If the user add above 50 events to iCal, the event does not adding in iCal and the app getting crash. So, i want to avoid the app crash. So, i planned to delay the adding event to iCal inside the for loop(While the loop is in running state). How can i pause the For loop running and continue the for loop after 10 sec’s delay. Meanwhile the for loop should continue after 10 sec’s from where it was paused. How can i do this? Any ideas? Please help to solve my problem? Thanks in advance.

Answer 1

The best way to do what you’re after is an NSOperationQueue but it’s a bit technical. Something like this might be easier to understand:

Header:

NSMutableArray *events;

When you specify your list of events:

events = /*....*/;
[self nextOp];

The nextOp method:

-(void)nextOp {
    // Do 10 events at a time.
    int stop = MIN(10,[events count]);
    for (int i = 0; i < stop; i++) {
        //Add [events objectAtIndex:i] to iCal
    }

    // Remove these processed events.
    [events removeObjectsInRange:NSMakeRange(0,stop)];
    if ([events count] > 0) {
        // We've still got more events to go, so schedule our next call
        [self performSelector:@selector(nextOp) withObject:nil afterDelay:10];
    } else {
        [events release];
        events = nil;
    }
}