我正在尝试通过PayPal以编程方式发送付款，但它无效。请指教，谢谢。
我的代码在下面，而下面是PayPal的cURL示例。
-(void)createPayment {
NSString *shortDescription = @"test description";
NSDecimalNumber *paymentDecimal = [NSDecimalNumber decimalNumberWithString:[NSString stringWithFormat:@"%.02f", [Global sharedInstance].currentOrder.itemPrice]];
NSString *sku = [NSString stringWithFormat:@"DBAR-%i", [Global sharedInstance].currentOrder.orderNumber];
NSString *name = [NSString stringWithFormat:@"%@", [Global sharedInstance].currentOrder.boozeBrand];
PayPalItem *item = [PayPalItem itemWithName:name withQuantity:[Global sharedInstance].currentOrder.itemQuantity withPrice:paymentDecimal withCurrency:@"USD" withSku:sku];
float priceFloat = [item.price floatValue];
float totalFloat = priceFloat * item.quantity;
NSDecimalNumber *total = [NSDecimalNumber decimalNumberWithString:[NSString stringWithFormat:@"%.02f", totalFloat]];
PayPalPayment *payment = [[PayPalPayment alloc] init];
payment.amount = total;
payment.currencyCode = @"USD";
payment.shortDescription = shortDescription;
payment.items = nil;
payment.paymentDetails = nil;
if (!payment.processable) {NSLog(@"Payment not processable.");}
NSString *token = [Global sharedInstance].accessToken;
NSString *bearerToken = [NSString stringWithFormat:@"Bearer %@", token];
NSDictionary *redirectDict = @{@"return_url":@"http://www.testurl.com",
@"cancel_url":@"http://www.testurl.com"};
NSDictionary *payerDict = @{@"payment_method":@"paypal"};
NSMutableDictionary *amountMutableDict = [[NSMutableDictionary alloc] init];
[amountMutableDict setObject:total forKey:@"total"];
[amountMutableDict setObject:@"USD" forKey:@"currency"];
NSDictionary *amountDict = [NSDictionary dictionaryWithDictionary:amountMutableDict];
NSMutableDictionary *transactionsMutableDict = [[NSMutableDictionary alloc] init];
[transactionsMutableDict setObject:amountDict forKey:@"amount"];
[transactionsMutableDict setObject:shortDescription forKey:@"description"];
NSDictionary *transactionsDict = [NSDictionary dictionaryWithDictionary:transactionsMutableDict];
NSMutableArray *transactionsMutableArray = [[NSMutableArray alloc] init];
[transactionsMutableArray addObject:transactionsDict];
NSArray *transactionsArray = [NSArray arrayWithArray:transactionsMutableArray];
NSMutableDictionary *dataMutableDict = [[NSMutableDictionary alloc] init];
[dataMutableDict setObject:@"sale" forKey:@"intent"];
[dataMutableDict setObject:redirectDict forKey:@"redirect_urls"];
[dataMutableDict setObject:payerDict forKey:@"payer"];
[dataMutableDict setObject:transactionsArray forKey:@"transactions"];
NSDictionary *dataDict = [NSDictionary dictionaryWithDictionary:dataMutableDict];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:@"https://api.sandbox.paypal.com/v1/payments/payment"]];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setValue:bearerToken forHTTPHeaderField:@"Authorization"];
NSString *post = [NSString stringWithFormat:@"intent=sale&redirect_urls=%@&payer=%@", redirectDict, payerDict];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long [postData length]];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody:postData];
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration];
NSURLSessionUploadTask *task = [session uploadTaskWithRequest:request fromData:postData completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (!error) {
NSLog(@"\nPurchase Response:\n\n%@", response.description);
} else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Authorization Failed" message:@"Your payment did not go through." delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
[alert show];
}
}];
[task resume];
}
PayPal的文档中的cURL示例：
curl https://api.sandbox.paypal.com/v1/payments/payment \
-v \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer accessToken' \
-d '{
"intent":"sale",
"redirect_urls":{
"return_url":"http://return_URL_here",
"cancel_url":"http://cancel_URL_here"
},
"payer":{
"payment_method":"paypal"
},
"transactions":[
{
"amount":{
"total":"7.47",
"currency":"USD"
},
"description":"This is the payment transaction description."
}
]
}'
以下是我通过上述NSLog声明从PayPal的回复：
购买回复：
<NSHTTPURLResponse: 0x1512732d0> { URL: https://api.sandbox.paypal.com/v1/payments/payment } { status code: 400, headers {
"CORRELATION-ID" = c0b729159d0c7;
Connection = "close, close";
"Content-Language" = "en_US";
"Content-Length" = 200;
"Content-Type" = "application/json";
Date = "Mon, 04 Apr 2016 19:48:20 GMT";
"PROXY_SERVER_INFO" = "host=slcsbplatformapiserv3001.slc.paypal.com;threadId=675";
"Paypal-Debug-Id" = "c0b729159d0c7, c0b729159d0c7";
Server = Apache;
"Set-Cookie" = "X-PP-SILOVER=name%3DSANDBOX3.API.1%26silo_version%3D1880%26app%3Dplatformapiserv%26TIME%3D80020055; domain=.paypal.com; path=/; Secure; HttpOnly, X-PP-SILOVER=; Expires=Thu, 01 Jan 1970 00:00:01 GMT";
Vary = Authorization;
} }
有人请告诉我为什么付款没有通过。我没有收到错误（或者它不会打印响应），我知道令牌很好，因为每次我使用应用程序时都必须登录到PayPal，我无法弄明白。谢谢！
C
答案 0 :(得分：2)
您应该将JSON数据打印到控制台，而不是打印NSURlResponse描述，以便您更好地了解。将代码修改为如下所示：
NSURLSessionUploadTask *task = [session uploadTaskWithRequest:request fromData:postData completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (!error) {
NSError* jsonError;
NSDictionary* json = [NSJSONSerialization JSONObjectWithData:data
options:kNilOptions
error:&jsonError];
NSLog(@"\nPurchase Response:\n\n%@", json); //You will have to edit this to use the actual error object returned from the curl request.
} else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Authorization Failed" message:@"Your payment did not go through." delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
[alert show];
}
}];
完成此操作后，您应该更好地了解出了什么问题。
更新
我现在更多地了解到了什么。您的请求确实格式不正确：您的帖子和帖子数据值不正确;你发送了一个字符串值（比如你通过网址发送）而不是json（下面这些行）
NSString *post = [NSString stringWithFormat:@"intent=sale&redirect_urls=%@&payer=%@", redirectDict, payerDict];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
用这个替换这两行：
NSError *jsonError;
NSData *postData = [NSJSONSerialization dataWithJSONObject:dataDict options:0 error:&error];