App crashes after sometime : - (void)viewDidUnload method

Question

In my iPad App,

I am using AQGridView.

This app is all about matching the cards to its categories.

In that I am deleting the cells.

If I am just opening the app for a few minutes it will not crashed.

But If I am playing the app for 3 to 4 minutes and deleting many cells it is getting crashes in the method.

Some memory leaks that I could not solve...

I have one array called imageMarray

I am doing shuffling on it.

In View Did Load.

 imageMArray=[NSMutableArray initWithArray:CategoryImages];
 imageMArray=[[self shuffleOnlyArray:imageMArray] retain];

In shuffleOnlyArray Method

-(NSMutableArray*)shuffleOnlyArray:(NSMutableArray*)sourceArray
{
    NSMutableArray *destArray1 = [[[NSMutableArray alloc] initWithCapacity: [sourceArray count]] autorelease];

    srandom( time(NULL));

    while ([sourceArray count] != 0)
    {
        NSUInteger index = (NSUInteger)(random() % [sourceArray count]);
        id item = [sourceArray objectAtIndex: index];
        [destArray1 addObject: item];
        [sourceArray removeObjectAtIndex:index];
    }

    [sourceArray release];
    sourceArray=nil;
    return destArray1;
}

And In shuffle Method I am writing

imageMArray=[[self shuffleOnlyArray:imageMArray] retain];

Where should I write release. So it does remove memory leak.

Previously It was crashing on another view controller in a viewDidUnload method, So I have commented the every line of that method..Now it is crashing in another view controller. — Arpit B Parekh, Mar 26 '12 at 05:29
Why even set this stuff to nil? Under ARC, it's unnecessary, and without ARC, a simple release message will suffice. — CodaFi, Mar 26 '12 at 05:32
OK will check and removing nil...wait for the comment further.... — Arpit B Parekh, Mar 26 '12 at 05:33
Still, App crashes but this time it is not shown in which method it is getting crashed. — Arpit B Parekh, Mar 26 '12 at 06:03
I have updated answer in the other [link](http://stackoverflow.com/questions/9733394/nsmutablearray-memory-management-while-calling-methods/9733501#9733501) — Ilanchezhian, Mar 26 '12 at 12:59

score 2 · Accepted Answer · answered Mar 26 '12 at 05:39

2

If you think the issue is with reference counting, select 'Product > Analyze' to get Xcode to check all of your retain and releases and other issues.

answered Mar 26 '12 at 05:39

Nathan Day

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You are right I have done that and my issue has been solved. – Arpit B Parekh Mar 29 '12 at 10:37

App crashes after sometime : - (void)viewDidUnload method

1 Answers1