Swift类属性更新 [英] Swift class-property update

问题描述

所以我必须将自定义类的实例从一个UIViewController传递到另一个:

So I have to pass instance of my custom class from one UIViewController to another:

targetVC.reservation = self.reservation!
print(self.reservation!.id, "before")
targetVC.reservation!.phoneNumber = self.phoneTextField.text!.phoneToString()
targetVC.reservation!.id = id
print(self.reservation!.id, "after")

我的问题是self.reservation!.id也被更改了:"之前"是""，而"之后"是id.为什么会发生以及如何避免这种情况?

My problem is that self.reservation!.id is also changed: "before" it is "", and "after" it is id. Why does it happen and how to avoid this?

推荐答案

您可以使用

You can use mutableCopy() with your object but for that your custom class need to extends from NSObject and its return type is Any so you need to explicitly type cast its result to your CustomClass.

targetVC.reservation = self.reservation!.mutableCopy() as! YourCustomClass

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