Swift 3.0错误＆＃34;无法转换类型＆＃34;

Question

我正在将大型代码库迁移到Swift 3.0。我生成错误if(!isset($_SESSION['cart_items'])){ $_SESSION['cart_items'] = array(); } // check if the item is in the array, if it is, do not add if(array_key_exists($id, $_SESSION['cart_items'])){ // redirect to product list and tell the user it was added to cart header('Location: products.php?action=exists&id' . $id . '&name=' . $name); } // else, add the item to the array else{ $_SESSION['cart_items'][$name]['price']=$price; if (!empty($quantity)){ echo "adding qty"; $_SESSION['cart_items'][$name]['quantity']=$quantity; } // redirect to product list and tell the user it was added to cart // header('Location: products.php?action=added&id' . $id . '&name=' . $name); }

我甚至尝试将newValue设置为"Cannot convert value of type 'Array<MultivalueEntry<Date>>?' to type 'AnyObject' in coercion.以下，但仍然会产生错误：

最后尝试将newValue设置为'Array<MultivalueEntry<Date>>?'但没有成功：

我做错了什么？

更新MultiValueEntry：

'Array<MultivalueEntry<NSObject>>?'

Answer 1

问题是泛型数组无法转换为NSArray或CFArray，因为Objective-C对泛型一无所知。好吧，MultivalueEntry<Date>是通用的。