Objective-C Builder pattern.

main.m

int main(int argc, char *argv[]) {
    @autoreleasepool {
        NutritionFacts *facts = [NutritionFacts new];

        // builder
        facts = [[[[facts builder] calories:100] sodium:35] build];
        
        // bean constructor pattern
        facts.calories=100;
        facts.sodium=35;
        
        // telescoping constructor pattern
        // [[NutritionFacts alloc] initWithCalories:100];
        // [[NutritionFacts alloc] initWithCalories:100 sodium:35];
    }
}

NutritionFacts+Builder.m

@interface NutritionFacts(Builder)
-(NutritionFactsBuilder*)builder;
@end

@implementation NutritionFacts(Builder)
-(NutritionFactsBuilder*)builder {
    return [[NutritionFactsBuilder alloc]initWithNutritionFacts:self];
}
@end

NutritionFacts.m

@interface NutritionFacts : NSObject
@property (nonatomic, assign) NSUInteger calories, carbohydrate, 
cholesterol, fat, fiber, protein, saturatedFat, sodium;
@end

@implementation NutritionFacts
@end

NutritionFactsBuilder.m

@interface NutritionFactsBuilder : NSObject
-(id)initWithNutritionFacts:(NutritionFacts*)facts;
@end

@implementation NutritionFactsBuilder {
    NutritionFacts *_facts;
}
-(id)initWithNutritionFacts:(NutritionFacts*)facts {
    self = [super init];
    if (self){
        _facts = facts;
    }
    return self;
}
-(BOOL)isValid {
    // ... check valid ivar combos
    NSAssert(YES,@"Always valid");
}
-(NutritionFacts*)build {
    [self isValid];
    return _facts;
}
-(instancetype)calories:(NSUInteger)calories {
    _facts.calories = calories;
    return self;
}
-(instancetype)sodium:(NSUInteger)sodium {
    _facts.sodium = sodium;
    return self;
}
// ...
@end