1 // 2 //選中商品調用支付寶快捷支付 3 // 4 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 5 { 6     /* 7      *點擊獲取PRodcut實例并初始化訂單信息 8      */ 9     Product *product = [_products objectAtIndex:indexPath.row];10     11     /*12      *商戶的唯一的parnter和seller。13      *本demo將parnter和seller信息存于（AlixPayDemo-Info.plist）中,外部商戶可以考慮存于服務端或本地其他地方。14      *簽約后，支付寶會為每個商戶分配一個唯一的 parnter 和 seller。15      */16     //如果partner和seller數據存于其他位置,請改寫下面兩行代碼17     NSString *partner = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"Partner"];18     NSString *seller = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"Seller"];19     20     //partner和seller獲取失敗,提示21     if ([partner length] == 0 || [seller length] == 0)22     {23         UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示"24                                                         message:@"缺少partner或者seller。" 25                                                        delegate:self 26                                               cancelButtonTitle:@"確定" 27                                               otherButtonTitles:nil];28         [alert show];29         [alert release];30         return;31     }32     33     /*34      *生成訂單信息及簽名35      *由于demo的局限性，本demo中的公私鑰存放在AlixPayDemo-Info.plist中,外部商戶可以存放在服務端或本地其他地方。36      */37     //將商品信息賦予AlixPayOrder的成員變量38     AlixPayOrder *order = [[AlixPayOrder alloc] init];39     order.partner = partner;40     order.seller = seller;41     order.tradeNO = [self generateTradeNO]; //訂單ID（由商家自行制定）42     order.productName = product.subject; //商品標題43     order.productDescription = product.body; //商品描述44     order.amount = [NSString stringWithFormat:@"%.2f",product.price]; //商品價格45     order.notifyURL =  @"http://www.xxx.com"; //回調URL46     47     //應用注冊scheme,在AlixPayDemo-Info.plist定義URL types,用于快捷支付成功后重新喚起商戶應用48     NSString *appScheme = @"AlixPayDemo"; 49     50     //將商品信息拼接成字符串51     NSString *orderSpec = [order description];52     NSLog(@"orderSpec = %@",orderSpec);53     54     //獲取私鑰并將商戶信息簽名,外部商戶可以根據情況存放私鑰和簽名,只需要遵循RSA簽名規范,并將簽名字符串base64編碼和UrlEncode55     id<DataSigner> signer = CreateRSADataSigner([[NSBundle mainBundle] objectForInfoDictionaryKey:@"RSA private key"]);56     NSString *signedString = [signer signString:orderSpec];57     58     //將簽名成功字符串格式化為訂單字符串,請嚴格按照該格式59     NSString *orderString = nil;60     if (signedString != nil) {61         orderString = [NSString stringWithFormat:@"%@&sign=/"%@/"&sign_type=/"%@/"",62                                  orderSpec, signedString, @"RSA"];63         64         //獲取快捷支付單例并調用快捷支付接口65         AlixPay * alixpay = [AlixPay shared];66         int ret = [alixpay pay:orderString applicationScheme:appScheme];67         68         if (ret == kSPErrorAlipayClientNotInstalled) {69             UIAlertView * alertView = [[UIAlertView alloc] initWithTitle:@"提示" 70                                                                  message:@"您還沒有安裝支付寶快捷支付，請先安裝。" 71                                                                 delegate:self 72                                                        cancelButtonTitle:@"確定" 73                                                        otherButtonTitles:nil];74             [alertView setTag:123];75             [alertView show];76             [alertView release];77         }78         else if (ret == kSPErrorSignError) {79             NSLog(@"簽名錯誤！");80         }81 82     }83 84     [tableView deselectRowAtIndexPath:indexPath animated:YES];85 }