为什么在Swift的String API中将unicode作为编码包含在内? [英] Why is unicode included as an Encoding in Swift's String API?

问题描述

我阅读了此阅读后，我意识到unicode是将字符映射到整数的代码点的标准.这些整数如何存储在内存中是一个完全不同的概念.这是.utf8，.utf16起作用的地方，它定义了我们将这些整数存储在内存中的方式.

After reading it I realized that unicode is a standard of mapping characters to code points which are integers. How these integers are stored in memory is an entirely different concept. This is where .utf8, .utf16 come into play, defining the way we store these integers in memory.

在Swift String API中，有一种方法可以为我们提供用于以各种编码表示String的数据字节:

In the Swift String API there is a method which gives us the data bytes used to represent the String in various encodings:

func data(using encoding: String.Encoding, allowLossyConversion: Bool = false) -> Data?

此方法的第一个参数的类型为String.Encoding.此结构Encoding的编码声明为:

The first parameter to this method is of Type String.Encoding. This struct Encoding has an encoding declared as:

static let unicode: String.Encoding

现在，该方法突然可以使用编码.unicode

Now suddenly the method can give me data representation of the String using the encoding .unicode

现在，这实际上与我在阅读提到的博客后得出的结论相反.它为我提供了字符串的数据表示形式，甚至以为unicode并没有为我提供如何存储它的详细信息.

Now this is in fact opposite to what I concluded after reading the mentioned blog. Its giving me data representation of a string, even thought unicode does not provide me details of how it can be stored.

有人可以告诉我我在这里想念什么吗?我现在真的很困惑.

Can any one tell me what am I missing here? I am really confused now.

推荐答案

String.Encoding.unicode与String.Encoding.utf16

print(String.Encoding.unicode)
print(String.Encoding.utf16)

上面的照片:

• Unicode(UTF-16)
• Unicode(UTF-16)

• Unicode (UTF-16)
• Unicode (UTF-16)

这篇关于为什么在Swift的String API中将unicode作为编码包含在内?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！