问题描述
NSUserDefaults有 integerForKey：， setInteger：forKey：和 stringForKey：，但没有 setString：forKey：。
NSUserDefaults has integerForKey:, setInteger:forKey: and stringForKey:, but does not have setString:forKey:.
如何将字符串设置为NSUserDefaults ？它有 setObject：forKey：但是，在Swift中，String是一个结构。是否可以使用 setObject：forKey：来存储字符串？
How do you set a string to NSUserDefaults? It has setObject:forKey: but, in Swift, String is a struct. Is it ok to use setObject:forKey: to store a string?
推荐答案
可用于应用在参考讨论中找到的字符串：
The reason that setObject can be used to apply a string is found in the discussion of the reference:
由于Swift String桥接到NSString，因此使用setObject有效。但是，由于使用setObject setter在NSUserDefaults中不接受所提到的其他类型;他们有自己的便利设置者。
Since Swift String is bridged to NSString, the usage of setObject is valid. However as the other types mentioned are not accepted in NSUserDefaults using the setObject setter; they have their own convenience setters.
尽管如此，几乎所有可以想到的东西都可以被序列化并使用带有NSData参数的setObject放入NSUserDefaults（如SO所示）。
Notwithstanding this, almost anything one can think of can be serialized and placed into NSUserDefaults using setObject with an NSData argument (as noted elsewhere on SO).
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