Question

I have a class:

@interface BasicDescription : NSObject

@property (strong,nonatomic) NSString *author;
@property (assign,nonatomic) NSInteger year;
@property (strong,nonatomic) NSString *owner;

And second class:

@interface AdvDescModel : BasicDescription

-(id)initWithBasicModel:(BasicDescription*)basicModel;

So my question is how to assign all properties when i’m create new object. Now i have

AdvDescModel *adv = [AdvDescModel alloc] initWithBasicModel:basic];

And then in initializer:

-(id)initWithBasicModel:(BasicDescription*)basicModel {

    if(self = [super init]) {
        [self setAllParams:basicModel];
    }
    return self;
}

-(void)setAllParams:(BasicDescription*)bModel {

    [self setAuthor:bModel.author];
    [self setYear:bModel.year];
    [self setOwner:bModel.owner];
}

But there is no better way to do this? Now i have to watch all my properties and calling setter for every one of them.

Answer 1

The way you initialize your object is not bad, if it fullfil your requirements you can leave in this way … However take a look at the Builder Pattern that would be the best bet in these kind of situations.