Swift spritekit 设置用户数据 [英] Swift spritekit set userdata

问题描述

在我的 swift spritekit 游戏中，我想在精灵上设置自定义值，我尝试这样做

In my swift spritekit game I want to set a custom value on a sprite I try to do this like so

p.userData?.setValue(value: "Hello", forKey: "c")

但是当我尝试这个时，它说找不到接受提供的参数的 'setValue' 的重载".

But when I try this it says "Could not find an overload for 'setValue' that accepts the supplied arguments".

所以主要问题是:

如何在精灵上设置自定义值?

How can I set a custom value on a sprite?

推荐答案

方法中的第一个参数没有外部参数名，因此应该是

The first argument in a method does not have an external parameter name, therefore it should be

p.userData?.setValue("Hello", forKey: "c")

或更好(因为 userData 是 NSMutableDictionary 并且没有键值编码这里需要魔法):

or better (since userData is a NSMutableDictionary and no Key-Value Coding magic is required here):

p.userData?.setObject("Hello", forKey: "c")

还要注意(正如评论中提到的)您必须创建字典第一:

Note also (as just mentioned in a comment) that you have to create the dictionary first:

p.userData = NSMutableDictionary()
p.userData?.setObject("Hello", forKey: "c")

或者，使用您的键和值分配字典:

or alternatively, assign a dictionary with your keys and values:

p.userData = ["c" : "Hello"]

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