如何在由逗号分隔的NSMutableString中添加多个字符串

Question

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";    

我做了类似的事情：

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

此处_arrayToCarryDataFromCartToPaymentPageInPaypal是MutableArray来自plist。

Answer 1

从PRODUCT获取_arrayToCarryDataFromCartToPaymentPageInPaypal数组，然后在其上使用componentsJoinedByString，以,分隔字符串。

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