C＃依赖注入(C# Dependency Injection)

 如果正确使用用户默认值，则应该能够从任何对象读取和写入，因为UserDefaults.standard是单例。 这些方面的东西应该有效： 
 
private let scoreUserDefaultsKey = "scoreUserDefaultsKey"

func save(score: Int)
{
    let userDefaults = UserDefaults.standard
    userDefaults.set(score, forKey: scoreUserDefaultsKey)
    userDefaults.synchronize()
}

func read() -> Int
{
    return UserDefaults.standard.integer(forKey: scoreUserDefaultsKey)
}

class GameScene1: SKScene {

    func saveFromGameScene1(score: Int) {
        save(score: score)
    }
}

class GameScene2: SKScene {

    func readFromGameScene2() -> Int {
        return read()
    }
}
 
 说你可以拥有一个更好的架构来实现一个ScoreManager对象并将它注入游戏场景中（而不是将单个硬件依赖于它）。 
 
 更新：刚刚看到你的代码片段。 您需要使用set ，而不是setValue 。 setValue不是UserDefaults的方法，而是KSO的NSObject方法。 
 
 
 
 func setValue（_ value：Any？，forKey key：String） 
 
 
 将给定键指定的接收器的属性设置为给定值。 如果key标识了一对一的关系，则将value指定的对象与接收者关联，如果存在，则与先前相关的对象无关。 给定一个集合对象和一个标识多对多关系的密钥，将集合中包含的对象与接收者联系起来，如果有的话，则与先前相关的对象无关。 
 
 
 setValue：forKey：uses的搜索模式在“键值编码编程指南”中的“访问器搜索模式”中进行了描述。 
 
 
 在引用计数环境中，如果直接访问实例变量，则保留值。 
 
 
 这不是你想要的;） 
 
 在调用set之后，请确保同时调用synchronize以确保该值立即存储。 
 
 我希望这有帮助。 

If you use user defaults correctly you should be able to read and write from any object as UserDefaults.standard is a singleton. Something along these lines should work:
 
private let scoreUserDefaultsKey = "scoreUserDefaultsKey"

func save(score: Int)
{
    let userDefaults = UserDefaults.standard
    userDefaults.set(score, forKey: scoreUserDefaultsKey)
    userDefaults.synchronize()
}

func read() -> Int
{
    return UserDefaults.standard.integer(forKey: scoreUserDefaultsKey)
}

class GameScene1: SKScene {

    func saveFromGameScene1(score: Int) {
        save(score: score)
    }
}

class GameScene2: SKScene {

    func readFromGameScene2() -> Int {
        return read()
    }
}
 
Said that you could have a much nicer architecture implementing a ScoreManager object and inject it (instead of having hard dependencies on a singleton) into your game scenes.
 
UPDATE: Just seen your code snippet. You need to use set, not setValue. setValue is not a method of UserDefaults but is a method of NSObject for KVO.
 
 
 
func setValue(_ value: Any?, forKey key: String)
 
 
Sets the property of the receiver specified by a given key to a given value. If key identifies a to-one relationship, relate the object specified by value to the receiver, unrelating the previously related object if there was one. Given a collection object and a key that identifies a to-many relationship, relate the objects contained in the collection to the receiver, unrelating previously related objects if there were any. 
 
 
The search pattern that setValue:forKey: uses is described in Accessor Search Patterns in Key-Value Coding Programming Guide. 
 
 
In a reference-counted environment, if the instance variable is accessed directly, value is retained.
 
 
That is not what you're looking for ;)
 
Also after you call set make sure to call synchronize as well to be certain that the value is stored immediately.
 
I hope this helps.