Objective-C：如何将字符串格式化为 $ Price
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Objective-C: How to format string as $ Price
提问by Mustafa
Is their a built-in way of formatting string as $ price, e.g. 12345.45converted to $12,345.45?
它们是将字符串格式化为 $ price 的内置方式，例如12345.45转换为$12,345.45？
回答by Rhult
Assuming you are using Cocoa (or just Foundation), you can use NSNumberFormatter and set its style to currency:
假设您正在使用 Cocoa（或只是 Foundation），您可以使用 NSNumberFormatter 并将其样式设置为货币：
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterCurrencyStyle];
... = [formatter stringFromNumber:number];
By default it uses the locale of your system, but you can change that and lots of other properties, see the NSNumberFormatterAPI docs.
默认情况下，它使用您系统的语言环境，但您可以更改它和许多其他属性，请参阅NSNumberFormatterAPI 文档。
回答by outis
Assuming the price is held in a float, you probably want +localizedStringWithFormat:.
假设价格是浮动的，您可能需要+localizedStringWithFormat:。
NSString *priceString = [NSString localizedStringWithFormat:@"$ %'.2f",price];
Hmmm... Apple says they follow the IEEE standard for printf, so it should accept the ' flag, but it doesn't work on Tiger. NSNumberFormatterit is.
嗯... Apple 表示他们遵循IEEE 标准 printf，因此它应该接受 ' 标志，但它不适用于 Tiger。NSNumberFormatter这是。
回答by user2053111
You need to get rid of the 'character
你需要摆脱这个'角色
So, just have this:
所以，只要这个：
NSString *priceString = [NSString localizedStringWithFormat:@"$ %.2f", price];
回答by Ula
NSString *formatedNumbers = [NSNumberFormatter localizedStringFromNumber:myNumber numberStyle:NSNumberFormatterCurrencyStyle];
