StackOverflow2013

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18601919
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2013-09-03T21:37:27.317
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2013-09-03T21:37:27.317
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In this situation if you do not use dispatch_sync, you will get exactly what you need: <pre><code>-(void)setUpWithView:(UIViewController*)viewController { containerController = [ContainerViewController sharedContainerController]; // Not using serial_queue and dispatch_sync [containerController initWithRootViewController:viewController];// line1 [containerController setUpView]; //line2 } </code></pre> Line 1 will execute initWithRootViewController:, going deeper and executing lines <pre><code>arrControllers = [[NSMutableArray alloc] init]; arrControllers = [NSMutableArray arrayWithObject:rootViewController]; </code></pre> then it will return from this function one level above and proceed, moving to line 2 and going down to line <pre><code>[self addChildViewController:[arrControllers lastObject]]; </code></pre> ALSO. Never write code like this <pre><code>arrControllers = [[NSMutableArray alloc] init]; arrControllers = [NSMutableArray arrayWithObject:rootViewController]; </code></pre> First line creates an empty NSMutableArray and assigns a pointer to it into arrControllers. Second line creates another array (autoreleased) and assigns a pointer to it in arrControllers again. So a link to array created in the first line is lost and it is leaked under manual memory management. If you use manual memory management, do the following: <pre><code>arrControllers = [[NSMutableArray alloc] init]; [arrControllers addObject:rootViewController]; </code></pre> OR <pre><code>arrControllers = [[NSMutableArray alloc] initWithObjects:rootViewController,nil]; </code></pre> Under ARC leave only second line. Hope I understood you correctly. Feel free to ask questions.
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1. POis it necessary to use dispatch_queue at here
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1. UShybridcattt
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1. COTx for pointing out another err about memory management.
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