是否有一种将CNPostalAddress转换为CNMutablePostalAddress的干净方法？

Question

我想修改CNPostalAddress的值，它是从CLPlacemark的postalAddress属性中获得的。

由于CNPostalAddress具有不可变的属性，所以我希望将其转换为CNMutablePostalAddress。然而，似乎没有一种干净的方法可以做到这一点。我目前的方法是：

extension CNPostalAddress {
    var mutableAddress: CNMutablePostalAddress {
        let address = CNMutablePostalAddress()

        address.city = city
        address.country = country
        address.postalCode = postalCode
        address.state = state
        address.street = street

        [...]

        return address
    }
}

有更好的方法来完成这个转换吗？

Answer 1

CNPostalAddress是一个扩展NSObject的类。这意味着您可以访问mutableCopy。

let contact = ... // some CNPostalAddress instance obtained elsewhere
let newContact = contact.mutableCopy() as! CNMutablePostalAddress
newContact.city = "Here"

不需要复制单个属性。

或者作为对您的分机的更新：

extension CNPostalAddress {
    var mutableAddress: CNMutablePostalAddress {
        return mutableCopy() as! CNMutablePostalAddress
    }
}

let contact = ... // some CNPostalAddress instance obtained elsewhere
let newContact = contact.mutableAddress
newContact.city = "Here"