Ios 如何在NSMutableString中添加多个由逗号分隔的字符串

我想在循环中创建一个逗号分隔的字符串，如下所示：-

string=@"A,B,C,D,E";    

我是这样做的：

for (int j=0; j<_arrayToCarryDataFromCartToPaymentPageInPaypal.count; j++)    
{    
  NSMutableDictionary *paypalArrayDataInDictionary=[_arrayToCarryDataFromCartToPaymentPageInPaypal objectAtIndex:j];    
  [productNameDetail appendString:[NSString stringWithFormat:@"%@,", [paypalArrayDataInDictionary objectForKey:@"PRODUCT"]]];    
}  

---

for（int j=0；j从
获取
产品的数组
\u arrayToCarryDataFromCartToPaymentPageInPaypal
，然后使用它获取由
分隔的字符串，

NSArray *products = [_arrayToCarryDataFromCartToPaymentPageInPaypal valueForKey:@"PRODUCT"];
NSString *str = [products componentsJoinedByString:@","];

从
\u arrayToCarryDataFromCartToPaymentPageInPaypal
获取
产品
的数组，然后使用该数组获取由
，
分隔的字符串

NSArray *products = [_arrayToCarryDataFromCartToPaymentPageInPaypal valueForKey:@"PRODUCT"];
NSString *str = [products componentsJoinedByString:@","];

你需要什么样的输出我需要这样的东西。string=“A，B，C，D，E”你能打印
\u arraytocarrydata from carttopaymentpageinpaypal
你需要什么样的输出我需要那样的东西。string=“A，B，C，D，E”你能打印
\u arraytocarrydata from carttopaymentpaymentpaymentpaypal
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