如何在Swift中格式化本地化字符串？ [英] How to format localised strings in Swift?

问题描述

我正在学习将我的应用本地化为简体中文。我正在关注如何执行本教程。

I am learning to localise my app to Simplified Chinese. I am following this tutorial on how to do this.

由于本教程基于Obj-C，格式化的字符串可以这样写：

Because the tutorial is based on Obj-C, formatted strings can be written like this:

"Yesterday you sold %@ apps" = "Ayer le vendió %@ aplicaciones";

你喜欢？ =~Es bueno？〜;

"You like?" = "~Es bueno?~";

但我使用的是Swift。在Swift中，我认为你不能使用％@ 来表明那里有东西放在那里。我们有字符串插值吗？

But I am using Swift. And in Swift I don't think you can use %@ to indicate that there is something to be placed there. We have string interpolation right?

我的应用程序与数学有关。我想显示哪些输入用于计算表格视图单元格的详细标签中的结果。例如

My app is kind of related to maths. And I want to display which input(s) is used to compute the result in a detailed label of a table view cell. For example

--------------
1234.5678
From x, y <---- Here is the detailed label
--------------

这里，从x，y 表示结果是从x和y计算的。我想把它翻译成中文：

Here, From x, y means "The result is computed from x and y". I want to translate this to Chinese:

从 x, y 得出

之前，我可以使用这个：

Before, I can just use this:

"From \(someVariable)"

使用字符串文件：

"From" = "从 得出";

这就是我在代码中使用它的方式

And this is how I would use it in code

"\(NSLocalizedString("From", comment: "")) \(someVariable)"

但是如果在中文版本中使用它，最终字符串将是这样的：

But if this were used in the Chinese version, the final string will be like this:

"从 得出 x, y"

我的意思是我可以把<字符串文件中的两个不同条目中的code>从和得出。但是有更好的方法吗？

I mean I can put the 从 and 得出 in two different entries in the strings file. But is there a better way to do it?

推荐答案

你可以使用％@ 在Swift的字符串（格式：...）中，它可以用Swift > String 或 NSObject 子类的任何实例。
例如，如果Localizable.strings文件包含定义

You can use %@ in Swift's String(format:...), it can be substituted by a Swift String or any instance of a NSObject subclass. For example, if the Localizable.strings file contains the definition

"From %@, %@" = "从 %@, %@ 得出";

然后

let x = 1.2
let y = 2.4
let text = String(format: NSLocalizedString("From %@, %@", comment: ""), "\(x)", "\(y)")
// Or alternatively:
let text = String(format: NSLocalizedString("From %@, %@", comment: ""), NSNumber(double: x), NSNumber(double: y))

产生从1.2,2.4得出。另一个选择是使用
％f 格式表示双浮点数：

produces "从 1.2, 2.4 得出". Another option would be to use the %f format for double floating point numbers:

"From %f, %f" = "从 %f, %f 得出";

with

let text = String(format: NSLocalizedString("From %f, %f", comment: ""), x, y)

请参阅 Niklas的回答
以获得更好的本地化解决方案数字代表
。

See Niklas' answer for an even better solution which localizes the number representation as well.

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