blockcrap.m

#import <Foundation/Foundation.h>
 
@interface Foo : NSObject
@property (readwrite, copy) void (^array)();
@end
 
@implementation Foo
 
- (id)initWithError:(NSString **)errorHandle;
{
	self = [super init];
	if (self)
	{
		self.array = ^{
			*errorHandle = @"Punk1";
		};
	}
	return self;
}
 
- (void)test:(NSString **)errorHandle cb:(dispatch_block_t)cb;
{
	self.array = ^{
		*errorHandle = @"Punk2";
	};
	cb();
	self.array = nil;
}
 
@end
 
int main(int argc, const char * argv[])
{
	@autoreleasepool
	{
		{
			NSString *e = nil;
			Foo *foo = [[Foo alloc] initWithError:&e];
			foo.array();
			NSLog(@"Null: %@", e);
		}
		
		{
			NSString *e = nil;
			Foo *foo = [[Foo alloc] init];
			[foo test:&e cb:^{
				foo.array();
			}];
			NSLog(@"Not Null: %@", e);
		}
	}
	
    return 0;
}