Re: A Data Object in Cocoa
Re: A Data Object in Cocoa
- Subject: Re: A Data Object in Cocoa
- From: Ken Thomases <email@hidden>
- Date: Fri, 9 Jan 2009 17:47:10 -0600
On Jan 9, 2009, at 1:49 AM, nik heger wrote:
- (id)initWithLabel:(NSString *)label pin:(NSString *)pin seed:
(NSString *)seed {
if (self = [super init]) {
self.label = label; ///<----------- compiler complains
self.pin = pin;
self.seed = seed;
}
return self;
}
I get three warnings that say "local declaration of x overrides
instance variables. I thought I could differentiate between the
parameters and the instance variables using self.variable vs just
variable.
The ambiguity isn't on the left side of the assignment. That is clear
enough with the dot syntax. The problem is on the right side, where a
plain, unadorned "label" could be an attempt to reference the
parameter or the instance variable.
Dot syntax is one way of accessing your properties, but not the only
way. The lack of dot syntax doesn't make an identifier fail to match
an instance variable.
Regards,
Ken
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