iOS开发 内购购买详细逻辑代码封装 oc代码

以下是一个iOS开发中内购购买逻辑的代码封装示例（Objective-C代码）：

首先，创建一个名为IAPManager的类来封装内购逻辑：

IAPManager.h文件：

#import <Foundation/Foundation.h>
#import <StoreKit/StoreKit.h>

@protocol IAPManagerDelegate <NSObject>

- (void)purchaseSuccessfulWithProductID:(NSString *)productID;
- (void)purchaseFailedWithError:(NSError *)error;

@end

@interface IAPManager : NSObject<SKPaymentTransactionObserver, SKProductsRequestDelegate>

@property (nonatomic, weak) id<IAPManagerDelegate> delegate;

+ (instancetype)sharedInstance;
- (void)startObservingTransactions;
- (void)stopObservingTransactions;
- (BOOL)canMakePurchases;
- (void)requestProductWithID:(NSString *)productID;
- (void)purchaseProduct:(SKProduct *)product;
- (void)restorePurchases;

@end

IAPManager.m文件：

#import "IAPManager.h"

@implementation IAPManager

+ (instancetype)sharedInstance {
    static IAPManager *sharedInstance = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedInstance = [[self alloc] init];
    });
    return sharedInstance;
}

- (void)startObservingTransactions {
    [[SKPaymentQueue defaultQueue] addTransactionObserver:self];
}

- (void)stopObservingTransactions {
    [[SKPaymentQueue defaultQueue] removeTransactionObserver:self];
}

- (BOOL)canMakePurchases {
    return [SKPaymentQueue canMakePayments];
}

- (void)requestProductWithID:(NSString *)productID {
    SKProductsRequest *request = [[SKProductsRequest alloc] initWithProductIdentifiers:[NSSet setWithObject:productID]];
    request.delegate = self;
    [request start];
}

- (void)purchaseProduct:(SKProduct *)product {
    SKPayment *payment = [SKPayment paymentWithProduct:product];
    [[SKPaymentQueue defaultQueue] addPayment:payment];
}

- (void)restorePurchases {
    [[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}

#pragma mark - SKProductsRequestDelegate

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {
    NSArray *products = response.products;
    if (products.count > 0) {
        SKProduct *product = products[0];
        [self purchaseProduct:product];
    } else {
        // Product not found
    }
}

#pragma mark - SKPaymentTransactionObserver

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray<SKPaymentTransaction *> *)transactions {
    for (SKPaymentTransaction *transaction in transactions) {
        switch (transaction.transactionState) {
            case SKPaymentTransactionStatePurchased:
                [self completeTransaction:transaction];
                break;
            case SKPaymentTransactionStateFailed:
                [self failedTransaction:transaction];
                break;
            case SKPaymentTransactionStateRestored:
                [self restoreTransaction:transaction];
                break;
            default:
                break;
        }
    }
}

- (void)completeTransaction:(SKPaymentTransaction *)transaction {
    [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
    if ([self.delegate respondsToSelector:@selector(purchaseSuccessfulWithProductID:)]) {
        [self.delegate purchaseSuccessfulWithProductID:transaction.payment.productIdentifier];
    }
}

- (void)failedTransaction:(SKPaymentTransaction *)transaction {
    if (transaction.error.code != SKErrorPaymentCancelled) {
        NSLog(@"Purchase failed with error: %@", transaction.error.localizedDescription);
    }
    [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
    if ([self.delegate respondsToSelector:@selector(purchaseFailedWithError:)]) {
        [self.delegate purchaseFailedWithError:transaction.error];
    }
}

- (void)restoreTransaction:(SKPaymentTransaction *)transaction {
    [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
    if ([self.delegate respondsToSelector:@selector(purchaseSuccessfulWithProductID:)]) {
        [self.delegate purchaseSuccessfulWithProductID:transaction.originalTransaction.payment.productIdentifier];
    }
}

@end

使用时，只需在需要进行内购的地方调用相应的方法即可。例如，请求某个产品的信息：

[[IAPManager sharedInstance] requestProductWithID:@"com.yourproductid"];

购买某个产品：

[[IAPManager sharedInstance] purchaseProduct:product];

恢复购买：

[[IAPManager sharedInstance] restorePurchases];

同时，需要在需要接收内购结果的类中实现IAPManagerDelegate协议的方法，例如：

@interface YourViewController : UIViewController<IAPManagerDelegate>

@end

@implementation YourViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [IAPManager sharedInstance].delegate = self;
}

- (void)purchaseSuccessfulWithProductID:(NSString *)productID {
    // 内购成功处理逻辑
}

- (void)purchaseFailedWithError:(NSError *)error {
    // 内购失败处理逻辑
}

@end

以上代码封装了基本的内购逻辑，可以根据具体需求进行扩展和修改