如何使用千个分隔符在的NSString

Question

的NSString就像“1000.00”和“1008977.72”，

我怎么能格式化为“1,000.00”和“1,008,977.00”

这是我的问题，并帮助我这个，先谢谢你。

Answer 1

我做了那么长时间。下面的代码：

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init]; 
[numberFormatter setGroupingSeparator:@","]; 
[numberFormatter setGroupingSize:3]; 
[numberFormatter setUsesGroupingSeparator:YES]; 
[numberFormatter setDecimalSeparator:@"."]; 
[numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle]; 
[numberFormatter setMaximumFractionDigits:2]; 
NSString *theString = [numberFormatter stringFromNumber:[NSNumber numberWithDouble:1008977.72]]; 

希望它可以帮助

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编辑

由于Olie问我会后，将使用当前的区域设置来设置分组的编码/十进制分隔符本身。

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init]; 
[numberFormatter setLocale:[NSLocale currentLocale]]; 
[numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle]; 
[numberFormatter setMaximumFractionDigits:2]; 
NSString *theString = [numberFormatter stringFromNumber:[NSNumber numberWithDouble:1008977.72]]; 
NSLog(@"The string: %@", theString); 

使用[NSLocale localeWithLocaleIdentifier:]代替[NSLocale currentLocale]给我的结果如下：

[NSLocale localeWithLocaleIdentifier:@"be_NL"] 
The string: 1 008 977,72 
[NSLocale localeWithLocaleIdentifier:@"en_GB"] 
The string: 1,008,977.72 
[NSLocale localeWithLocaleIdentifier:@"DE"] 
The string: 1.008.977,72 
[NSLocale localeWithLocaleIdentifier:@"en_US"] 
The string: 1,008,977.72 

Answer 2

只是翻译斯威夫特：

let formatter = NumberFormatter() 
    formatter.groupingSeparator = "," 
    formatter.groupingSize = 3 
    formatter.usesGroupingSeparator = true 
    formatter.decimalSeparator = "." 
    formatter.numberStyle = .decimal 
    formatter.maximumFractionDigits = 2 
    formatter.minimumFractionDigits = 2 
    formatter.minimumIntegerDigits = 1 
    let result = formatter.string(from: NSNumber(value: value)) ?? "0.00"