Memory not released when popViewController Called

Question

Below is the code in which i have some doubts:-

MyController *vc= [MyViewController alloc] initWithNibName:@"myController"
                                                    bundle:nil];
[self.navigationController pushViewController:vc animated:YES];
[vc release];

Then, i pop my controller by pressing the back button on nav bar.

The problem is memory is increased by 5mb(On Activity Monitor) for the first time.And when i pop the controller it doesnt get released. And when i do the push and pop again and again the memory increases by small amount and decreased too.

UIView *myView=[UIView alloc]init];

self.vi=myView;

[myView release];

UIScrollView *mySv=[UIScrollView alloc]init];

self.sv=mySv;

[mySvrelease];

UIProgressView*myPv=[UIProgressViewalloc]init];

self.pv=myPv;

[myPvrelease];

UIWebView *myWv=[UIWebView alloc]init];

self.wv=myWv;

[myWv release];

-(void)dealloc { [wv relase];

[sv release]

[pv release];

[vi release];

[super dealloc];

}

wv,sv,pv,vi are MyViewControoler variables which have retain attribute. I wrote this code to check the memory management concepts,but iam confused now seeing the activity monitor and instruments results.

I have verified that no object is getting leaked in my MyController class by using Instruments on it.

score 1 · Answer 1 · answered Feb 10 '12 at 10:25

1

MyViewController have a content which does a leaks

answered Feb 10 '12 at 10:25

NeverBe

5,213
2
25
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which type of contents you are reffering to? – iAviator Feb 10 '12 at 11:34

score 0 · Answer 2 · answered Feb 10 '12 at 11:54

0

Its not a memory leak. iOS cache the controllers you have visited recently. It will get deallocated by iOS itself when your application needs memory to execute some other tasks.

answered Feb 10 '12 at 11:54

Apurv

17,116
8
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Yes, it is a leak. No, iOS does not cache recently used controllers. – Stephen Darlington Feb 10 '12 at 12:01
If its a leak, it should increase memory usage each time. – Apurv Feb 10 '12 at 12:06
Actually iam also confused in this if its a leak or not.Please help – iAviator Feb 10 '12 at 15:06
Does anyone have apple doc which states that apple cache the controllers in my case the navigation stack – iAviator Feb 10 '12 at 15:39

score -1 · Answer 3 · answered Feb 10 '12 at 11:45

-1

try this method in MyViewController.m file

- (void)dealloc
{
    //release any object thats retained into the memory
    [super dealloc];
}

answered Feb 10 '12 at 11:45

hchouhan02

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I have released all my class variables in dealloc method. – iAviator Feb 10 '12 at 15:04

Memory not released when popViewController Called

3 Answers3

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