IBAction Lags When Button Pressed - iphone

Question

I have a UIViewController with a UITableView in it. I add a UIView as a subview on top of that. When I press one of the UIButtons on the subview, there is a noticeable lag. How do I make it faster?
See video: http://www.youtube.com/watch?v=KWy6NrZUeqA&feature=youtu.be
- (IBAction)tweetThat:(id)sender {
[MBProgressHUD showHUDAddedTo:self.socialMediaView animated:YES];
dispatch_queue_t queueOne=dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_sync(queueOne, ^{
NSString *tweetBody=#"BLABLABLATweet";
if ([TWTweetComposeViewController canSendTweet])
{
TWTweetComposeViewController *tweetSheet =
[[TWTweetComposeViewController alloc] init];
[tweetSheet setInitialText:tweetBody];
dispatch_async(dispatch_get_main_queue(), ^{
[MBProgressHUD hideHUDForView:self.controllerView animated:YES];
[self presentModalViewController:tweetSheet animated:YES];
});
}
});
}

Answer 1

I've used the dispatch method you tried above, but with a few changes. It has really made the experience a lot better. "loadingView" is as named, just a loading view that displays before the tweet view comes up.
loadingView.hidden = NO;
[loadingView setNeedsDisplay];
if ([TWTweetComposeViewController canSendTweet])
{
double delayInSeconds = 0.5;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
TWTweetComposeViewController *tweet = [[TWTweetComposeViewController alloc]init];
[tweet setInitialText:#"I'm using a new app called TickTalk to help my speaking cadence. Check it out!"];
[tweet addURL:[NSURL URLWithString:#"http://www.ticktalkapp.com"]];
TWTweetComposeViewControllerCompletionHandler
completionHandler =
^(TWTweetComposeViewControllerResult result) {
switch (result)
{
case TWTweetComposeViewControllerResultCancelled:
NSLog(#"Twitter Result: canceled");
break;
case TWTweetComposeViewControllerResultDone:
NSLog(#"Twitter Result: sent");
break;
default:
NSLog(#"Twitter Result: default");
break;
}
loadingView.hidden = YES;
[self dismissModalViewControllerAnimated:YES];
};
[tweet setCompletionHandler:completionHandler];
[self presentModalViewController:tweet animated:YES];
});
}
else
{
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:#"Sorry" message:#"Your device is not setup to tweet" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
loadingView.hidden = YES;
}

Answer 2

change your dispatch_sync to dispatch_async. what is the point of dispatching to the background if you are going to lock up the UI until it returns.

Answer 3

The lag is from TWTweetComposeViewController. There is nothing you can do about it because its a system optimization. You'll probably notice the second and third times you hit the button the lag it gone.