Does ARC need to set nil for all strong members when unloading the viewcontroller? It is necessary?

2:

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https://github.com/robertmryan/arc-problem-project

Update:

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//  ArcTestViewController.m

#import "ArcTestViewController.h"

#pragma mark - IvarObject

@interface IvarObject : NSObject
@end

@implementation IvarObject

- (void)dealloc
{
    NSLog(@"%s", __FUNCTION__);
}

@end

#pragma mark - ArcTestViewController

@interface ArcTestViewController ()
{
    IvarObject __strong *_ivarObject;
}
@end


@implementation ArcTestViewController

- (void)dealloc
{
    NSLog(@"%s", __FUNCTION__);

//    _ivarObject = nil;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    _ivarObject = [[IvarObject alloc] init];
}

@end

=nil dealloc, :

2012-07-12 10: 33: 33.644 test4 [36045: 11903] - [ArcSimpleTestViewController dealloc]

, =nil dealloc, :

2012-07-12 10: 35: 23.117 test4 [36083: 11903] - [ArcSimpleTestViewController dealloc]

2012-07-12 10: 35: 23.119 test4 [36083: 11903] - [IvarObject2 dealloc]

, , , deallocs .

Rob Napier provided the sample code below (I appreciate it and others taking my time), but even the code above works fine when I put it in another project, but in my current project it is not freed up properly!

Update from Rob Napier: A simpler example (all in one file) demonstrating how this works. Put this in a file and compile as indicated:

//  arc.m
//  Compile with:
//      clang -fobjc-arc -framework Foundation -o arc arc.m

#import <Foundation/Foundation.h>

#pragma mark - IvarObject

@interface IvarObject : NSObject
@end

@implementation IvarObject

- (void)dealloc
{
    NSLog(@"%s", __FUNCTION__);
}

@end

#pragma mark - PropertyObject

@interface PropertyObject : NSObject
@end

@implementation PropertyObject

- (void)dealloc
{
    NSLog(@"%s", __FUNCTION__);
}

@end


#pragma mark - ArcTest

@interface ArcTest : NSObject
{
    IvarObject __strong *_ivarObject;
}

@property (nonatomic, strong) PropertyObject *propertyObject;

@end


@implementation ArcTest

@synthesize propertyObject = _propertyObject;

- (void)dealloc
{
    NSLog(@"%s", __FUNCTION__);

//    _ivarObject = nil;
//    _propertyObject = nil;
}

- (void)assignStuff
{
    _ivarObject = [[IvarObject alloc] init];
    self.propertyObject = [[PropertyObject alloc] init];
}

@end

int main () {
    ArcTest *test = [[ArcTest alloc] init];
    [test assignStuff];
    test = nil;
    NSLog(@"End program");
}