Objective-C Base Class Property Custom Getter Not Being Called From Subclass

Question

Base Class Interface:

@interface Base : NSObject

@property (nonatomic, readonly, getter=getPriceForListing) double_t priceForListing;

@end

Base Class Implementation:

@implementation Base

-(double_t)getPriceForListing
{
    if (self.listPriceLow > 0 && self.listPriceHigh > 0)
    {
        return self.listPriceLow;
    }
    else if (self.listPriceLow > 0)
    {
        return self.listPriceLow;
    }
    else if (self.listPriceHigh > 0)
    {
        return self.listPriceHigh;
    }
    else
    {
        return self.currentPrice;
    }
}

@end

Subclass Interface:

@interface Subclass : Base

@end

Subclass Implementation:

@implementation Subclass

@dynamic priceForListing;

@end

How subclass is used:

Subclass *sub = [[Subclass alloc] init];
NSLog(@"%@", sub.priceForListing);

The problem I am having here is that sub.priceForListing always returns zero and the base class getter is never being called, at least no breakpoint is being hit in there.

Answer 1

You defined the "getter" as getPriceForListing but are trying to access it with priceForListing . Just omit the custom name.

Rename the "getter" method to priceForListing .

If there is no backing instance variable, IOW it is never set you can specify it to be readonly .

As mentioned in the comments: Delete: @dynamic priceForListing; .

FYI: In Objective-C/Cocoa the "get" prefix is reserved by convention for methods that return a value by reference. Getters do not have a "get" prefix.