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What's the difference between [NSOperationQueue currentQueue] and performSelectorOnMainThread (iOS platform)
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What's the difference between [NSOperationQueue currentQueue] and performSelectorOnMainThread (iOS platform)


  • Subject: What's the difference between [NSOperationQueue currentQueue] and performSelectorOnMainThread (iOS platform)
  • From: 尹佳冀 <email@hidden>
  • Date: Sun, 03 Feb 2013 15:41:37 +0800

Hi All

Does anyone can know what the difference between [NSOperationQueue
currentQueue] and
performSelectorOnMainThread, If I do some work use operation
on [NSOperationQueue mainQueue], the UI will not hang up, but if i
use performSelectorOnMainThread the UI will hang up

- (void) doTheThing

{

//Do do some work about 9~20 s

}


       [self showIndicatorWithString:NSLocalizedString(@"Doing...", nil)];
// is a MBProgreessHUD, add a view then use a animation to show

        //Case 4 not hang up, HUD show and can refresh, but the screen
cannot response user's touch

        NSInvocationOperation *operation = [[NSInvocationOperation alloc]
initWithTarget:self


    selector:@selector(doTheThing)


      object:nil];

        [[NSOperationQueue mainQueue] addOperation:operation];

        //Case 2 hang up, HUD not show

        //[self doTheThing];

        //Case 3 hang up, HUD not show

        //[self performSelectorOnMainThread:@selector(doTheThing)
withObject:nil waitUntilDone:YES];

        //Case 4 not hang up, HUD show and can refresh, but the screen
cannot response user's touch

         NSInvocationOperation *operation = [[NSInvocationOperation alloc]
initWithTarget:self


    selector:@selector(doTheThing)


      object:nil];

        [[NSOperationQueue currentQueue] addOperation:operation];

--
Fykec Yin
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