This solution includes checks for currency conversion as well as description methods. It is comment heavy (I comment the hell out of the challenges for my own retention).
ZGCStockHolding.h
//
// ZGCStockHolding.h
// ObjC_Classes_ZGCPortfolio_Stocks_Challenge
//
// Created by EvilKernel on 10/12/14.
// Copyright (c) 2014 Zerogravity. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface ZGCStockHolding : NSObject
// declaring properties
@property (nonatomic) float purchaseSharePrice;
@property (nonatomic) float currentSharePrice;
@property (nonatomic) int numberOfShares;
@property (nonatomic, copy) NSString *symbol;
// declaring methods
- (void)addToStocks:(NSMutableArray *)array; //add to array via method instead of in main()
- (float)costInDollars; // purchaseSharePrice * numberOfShares
- (float)valueInDollars; // currentSharePrice * numberOFShares
@endZGCStockHolding.m
//
// ZGCStockHolding.m
// ObjC_Classes_ZGCPortfolio_Stocks_Challenge
//
// Created by EvilKernel on 10/12/14.
// Copyright (c) 2014 Zerogravity. All rights reserved.
//
#import "ZGCStockHolding.h"
@implementation ZGCStockHolding
- (void)addToStocks:(NSMutableArray *)array
{
[array addObject:self];
}
- (float)costInDollars
{
return [self purchaseSharePrice] * [self numberOfShares];
}
- (float)valueInDollars
{
return [self currentSharePrice] * [self numberOfShares];
}
@end
ZGCForeignStockHolding.h
//
// ZGCForeignStockHolding.h
// ObjC_Classes_ZGCPortfolio_Stocks_Challenge
//
// Created by EvilKernel on 10/12/14.
// Copyright (c) 2014 Zerogravity. All rights reserved.
//
#import "ZGCStockHolding.h"
@interface ZGCForeignStockHolding : ZGCStockHolding
@property (nonatomic) float conversionRate; // only one property in this subclass
@endZGCForeignStockHolding.m
//
// ZGCForeignStockHolding.m
// ObjC_Classes_ZGCPortfolio_Stocks_Challenge
//
// Created by EvilKernel on 10/12/14.
// Copyright (c) 2014 Zerogravity. All rights reserved.
//
#import "ZGCForeignStockHolding.h"
@implementation ZGCForeignStockHolding
// overriding these methods to account for conversion of foreign stock in US dollars
- (float)costInDollars
{
if (self.conversionRate) { // if conversionRate not nil, process subclass method, else revert to SuperClass method to avoid 0 values.
float localCostInDollars = [super costInDollars];
return localCostInDollars * self.conversionRate;
}else{
return [super costInDollars];
}
}
- (float)valueInDollars
{
if (self.conversionRate) {
float localValueInDollars = [super valueInDollars];
return localValueInDollars * self.conversionRate;
}else{
return [super valueInDollars];
}
}
- (NSString *)description //overriding descriptipn method
{
// pull Currency locale information
NSLocale *userLocale = [NSLocale currentLocale];
NSString *currencyCode = [userLocale objectForKey:NSLocaleCurrencyCode];
NSString *currencySym = [userLocale objectForKey:NSLocaleCurrencySymbol];
float cost = [self costInDollars];
float value = [self valueInDollars];
if ([currencySym isEqualTo:@"$"]) {
self.conversionRate = 0;
return [NSString stringWithFormat:@"You paid $%.2fUSD for %d shares of %@, now valued at $%.2fUSD", cost, [self numberOfShares], [self symbol], value];
}else{
NSString *conversionRateLog = [NSString stringWithFormat:@"Your conversion rate from %@ to USD: %.2f", currencyCode, self.conversionRate];
return [NSString stringWithFormat:@"%@, You paid $%.2fUSD for %d shares of %@, now valued at $%.2fUSD", conversionRateLog, cost, [self numberOfShares], [self symbol], value];
}
}
@end
ZGCPortfolio.h
//
// ZGCPortfolio.h
// ObjC_Classes_ZGCPortfolio_Stocks_Challenge
//
// Created by EvilKernel on 10/13/14.
// Copyright (c) 2014 Zerogravity. All rights reserved.
//
#import <Foundation/Foundation.h>
@class ZGCForeignStockHolding; //
@interface ZGCPortfolio : NSObject
// declaring properties
@property (nonatomic, copy) NSMutableArray *holdings;
// declaring methods
- (float)totalValue;
@endZGCPortfolio.m
[code]
//
// ZGCPortfolio.m
// ObjC_Classes_ZGCPortfolio_Stocks_Challenge
//
// Created by EvilKernel on 10/13/14.
// Copyright © 2014 Zerogravity. All rights reserved.
//
#import “ZGCPortfolio.h”
#import “ZGCForeignStockHolding.h”
@implementation ZGCPortfolio
-
(float)totalValue
{
float sum = 0;
for (ZGCForeignStockHolding *s in _holdings) {
sum += [s valueInDollars];
}
return sum;
} -
(NSString )description //overriding description method
{
return [NSString stringWithFormat:@"\n\n*** Your Portfolio’s total worth is valued at $%.2fUSD ****\n\n", self.totalValue];
}
@end[/code]
main.m
[code]
//
// main.m
// ObjC_Classes_ZGCPortfolio_Stocks_Challenge
//
// Created by EvilKernel on 10/12/14.
// Copyright © 2014 Zerogravity. All rights reserved.
//
#import <Foundation/Foundation.h>
#import “ZGCForeignStockHolding.h”
#import “ZGCPortfolio.h”
int main(int argc, const char * argv[])
{
@autoreleasepool {
// Two US 'stock' instances
ZGCStockHolding *stockUS1 = [[ZGCForeignStockHolding alloc] init];
stockUS1.symbol = @"APPL";
stockUS1.numberOfShares = 40;
stockUS1.purchaseSharePrice = 2.30;
stockUS1.currentSharePrice = 4.50;
ZGCStockHolding *stockUS2 = [[ZGCForeignStockHolding alloc] init];
stockUS2.symbol = @"BNNE";
stockUS2.numberOfShares = 90;
stockUS2.purchaseSharePrice = 12.19;
stockUS2.currentSharePrice = 15.56;
// Two Foreign stock instances
ZGCForeignStockHolding *stockUK = [[ZGCForeignStockHolding alloc] init];
stockUK.symbol = @"UKLN";
stockUK.numberOfShares = 10; // subclass can use variables from its SuperClass
stockUK.purchaseSharePrice = 1.50;
stockUK.currentSharePrice = 2.00;
stockUK.conversionRate = 2.50; // new property via new subclass
ZGCForeignStockHolding *stockCH = [[ZGCForeignStockHolding alloc] init];
stockCH.symbol = @"CHPN";
stockCH.numberOfShares = 10; // subclass can use variables from its SuperClass
stockCH.purchaseSharePrice = 1.50;
stockCH.currentSharePrice = 2.00;
stockCH.conversionRate = 4.50; // new property via new subclass
// One Portfolio instance
ZGCPortfolio *myPortfolio = [[ZGCPortfolio alloc] init];
// set holdings for portfolio
myPortfolio.holdings = [[NSMutableArray alloc] initWithObjects:stockUS1, stockUS2, stockUK, stockCH, nil];
NSLog(@"%@", myPortfolio.holdings); //uses description method for ZCGForeignHolding object
NSLog(@"%@", myPortfolio); //uses description method for portfolio
}
return 0;
}[/code]
[color=#008000]OUTPUT W/OUT CONVERSION*
2014-10-21 01:36:31.497 ObjC_Classes_ZGCPortfolio_Stocks_Challenge[41770:5265223] (
“You paid $92.00USD for 40 shares of APPL, now valued at $180.00USD”,
“You paid $1097.10USD for 90 shares of BNNE, now valued at $1400.40USD”,
“You paid $37.50USD for 10 shares of UKLN, now valued at $50.00USD”,
“You paid $67.50USD for 10 shares of CHPN, now valued at $90.00USD”
)
2014-10-21 01:36:31.498 ObjC_Classes_ZGCPortfolio_Stocks_Challenge[41770:5265223]
**** Your Portfolio’s total worth is valued at $1620.40USD ****
Program ended with exit code: 0[/color]
[color=#4000FF]***OUTPUT W/CONVERSION
2014-10-21 01:44:50.401 ObjC_Classes_ZGCPortfolio_Stocks_Challenge[41845:5326478] (
“Your conversion rate from USD to USD: 0.00, You paid $92.00USD for 40 shares of APPL, now valued at $180.00USD”,
“Your conversion rate from USD to USD: 0.00, You paid $1097.10USD for 90 shares of BNNE, now valued at $1400.40USD”,
“Your conversion rate from EUR to USD: 2.50, You paid $37.50USD for 10 shares of UKLN, now valued at $50.00USD”,
“Your conversion rate from EUR to USD: 4.50, You paid $67.50USD for 10 shares of CHPN, now valued at $90.00USD”
)
2014-10-21 01:44:50.402 ObjC_Classes_ZGCPortfolio_Stocks_Challenge[41845:5326478]
**** Your Portfolio’s total worth is valued at $1720.40USD ****
Program ended with exit code: 0
[/color]