Objective-C：如何将字符串格式化为$ Price

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问题描述

它们是将字符串格式化为$ price的内置方式，例如 12345.45 转换为 $ 12,345.45 ？

解决方案

  NSNumberFormatter * formatter = [[NSNumberFormatter alloc] init]; 
 [formatter setNumberStyle：NSNumberFormatterCurrencyStyle]; 
 ... = [formatter stringFromNumber：number];

默认情况下，它使用系统的语言环境，但是可以更改其他属性，请参阅 API文档。

Is their a built-in way of formatting string as $ price, e.g. 12345.45 converted to $12,345.45?

解决方案

Assuming you are using Cocoa (or just Foundation), you can use NSNumberFormatter and set its style to currency:

NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterCurrencyStyle];
... = [formatter stringFromNumber:number];

By default it uses the locale of your system, but you can change that and lots of other properties, see the NSNumberFormatter API docs.

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