本文探讨了在Swift中如何使用NSString及其构造器，并解释了为何可以无缝地将NSString转换为Swift String类型而不会出现类型不匹配错误。通过具体代码示例展示了如何将NSData转换为NSString，再进一步转换为Swift标准的String类型。
They are interchangeable, so there's really no reason not to use NSString and its constructors when you need to. This will work fine:
var datastring: String = NSString(data:data, encoding:NSUTF8StringEncoding)
There's no type mismatch error here because Swift recognises the return type of NSString's constructor as matching the specified String type of datastring. You can then use datastring just like any other Swift string, e.g.
var foo = datastring + "some other string"
var datastring: String = NSString(data:data, encoding:NSUTF8StringEncoding)
There's no type mismatch error here because Swift recognises the return type of NSString's constructor as matching the specified String type of datastring. You can then use datastring just like any other Swift string, e.g.
var foo = datastring + "some other string"
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