Thanks for the solution guys - I fully understand now! Also thanks for
the advice and the super quick replies.
C
On 7 Nov 2008, at 12:17, Roland King <[EMAIL PROTECTED]> wrote:
the iPhone documentation - I guess because it's recent, tends to use
properties quite a lot. You'll even find in the class description
documentation that things are documented as properties instead of
setXXX and XXX methods (and it tells you which are readwrite and
readonly etc.).
In this case whatever self is has declared viewController as a
readwrite/retain property, so self.viewController = aViewController
is the same as [ self setViewController:aViewController ] and
perhaps you're happier with that syntax and realizing that the
implementation of setViewController would retain the object and the
dealloc() will eventually release it.
take a look at the MoveMeAppDelegate.h file, you'll see that
property defined as I said as readwrite, retain and it's synthesized
in the .m file and released in dealloc().
I started off using the property syntax but I stopped again and I'm
long-winded and use the [ self setXXX: ] form instead because I find
for me it's easier to remember that I'm really calling a method on
an object. Your mileage may vary. Even if you define things as
properties you don't HAVE to use the 'dot' syntax if the other way
makes it clearer to you.
On Nov 7, 2008, at 7:59 PM, Calum Robertson wrote:
Hi,
Below is a snippet of code from the "Creating an iPhone
Application" document from the iPhone DevCenter. I'm not clear as
to why this works. My understanding is that when [UIViewController
alloc] is executed, the retain count is 1 and then when
[aViewController release] is called, the retain count reduces to
zero. Does self.viewController not then reference deallocated
memory? I thought I had got the hang of retain / release but this
snippet confused me...
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
// Set up the view controller
UIViewController *aViewController = [[UIViewController alloc]
initWithNibName:@"MoveMeView" bundle:[NSBundle
mainBundle]];
self.viewController = aViewController;
[aViewController release];
// Add the view controller's view as a subview of the window
UIView *controllersView = [viewController view];
[window addSubview:controllersView];
[window makeKeyAndVisible];
}
C
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