Re: Regarding MVC design pattern
Re: Regarding MVC design pattern
- Subject: Re: Regarding MVC design pattern
- From: Barry Skidmore <email@hidden>
- Date: Thu, 20 May 2010 09:45:26 -0500
If you need to have it set you should create an initWithOptionName:
and call that from your standard init, or return an error stating a
missing value is needed.
Your init should always call down tithe most specific init.
Specific examples of this are available as best practice in several
cocoa and design pattern books.
Sent from my iPhone
On May 20, 2010, at 9:40 AM, Thomas Davie <email@hidden> wrote:
On 20 May 2010, at 15:24, mmalc Crawford wrote:
On May 19, 2010, at 4:38 am, Sherm Pendley wrote:
If you set the ivars directly, as above, the synthesized setters
will
NOT be called. For that to happen, you need to use dot-syntax, like
this:
- (void) dealloc {
self.beginButton = nil;
self.endButton = nil;
// etc...
[super dealloc];
}
You do not *need* to use the dot syntax to invoke the accessors
synthesised for a property. You can also use the corresponding
accessor method using [] syntax, e.g.
[self setBeginButton:nil];
However, you should typically not invoke accessor methods in init
or dealloc methods.
Can I ask why you shouldn't use them in init? It makes a lot of
sense to not use them in alloc/dealloc, but I'm not using them in
init... after all, what if I replace the ivar with a derived
property from another object? Why should I have to recode my init?
Bob_______________________________________________
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