Activity Indicator doesn't stop in the same method

Question

In the method viewDidLoad I initialize an ActivityIndicatorView.Then, in the following method I sent the activity indicator to start. When I start the app and it runs the if statement, the activity indicator starts, but when operations in the dispatch queue are performed, the activityIndicator is not stopped. Here the method:

-(void) tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{

    if([indexPath row] == [_myArray count]-2){

        [_activityIndicator startAnimating];

        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{

            //Here I perform some operations

            [self.tableView reloadData];

            [_activityIndicator stopAnimating];
        });
    }
}

I wish that the activity indicator is stopped after the execution of operations in the dispatch queue!

Krivoblotsky · Accepted Answer · 2014-04-04 19:07:50Z

10

You should perform your UI operations only on main thread. Try to refactor:

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{

    //Here I perform some operations

    dispatch_async(dispatch_get_main_queue(), ^{
        [self.tableView reloadData];

        [_activityIndicator stopAnimating];

    });
});

answered Apr 4, 2014 at 19:07

Krivoblotsky

1,50211 silver badges17 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

rounak · Accepted Answer · 2014-04-04 19:06:42Z

3

All your UI operations should be done on the main thread. That's probably the problem.

answered Apr 4, 2014 at 19:06

rounak

9,4373 gold badges44 silver badges59 bronze badges

Collectives™ on Stack Overflow

Activity Indicator doesn't stop in the same method

2 Answers 2

Comments

Comments

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Related