swift - 如何在 ""内打印双引号？

Question

有人可以告诉我如何以“带”双引号的方式打印某些内容。

“双引号”

Answer 1

在要插入字符串的双引号之前加一个反斜杠:

let sentence = "They said \"It's okay\", didn't they?"

现在句子是:

They said "It's okay", didn't they?

这称为“转义”字符:您正在使用它的文字值，它不会被解释。

<小时/>

使用 Swift 4，您也可以选择对不需要转义的文字文本使用 """ 分隔符:

let sentence = """
They said "It's okay", didn't they?
Yes, "okay" is what they said.
"""

这给出:

They said "It's okay", didn't they?
Yes, "okay" is what they said.

<小时/>

在 Swift 5 中，您可以使用增强的分隔符:

String literals can now be expressed using enhanced delimiters. A string literal with one or more number signs (#) before the opening quote treats backslashes and double-quote characters as literal unless they’re followed by the same number of number signs. Use enhanced delimiters to avoid cluttering string literals that contain many double-quote or backslash characters with extra escapes.

您的字符串现在可以表示为:

let sentence = #"They said "It's okay", didn't they?"#

如果你想在字符串中添加变量，你还应该在反斜杠后添加#:

let sentence = #"My "homepage" is \#(url)"#