NSNumberFormatter 数字格式化 银行、手机号等

一、Demo
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];

numberFormatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];//设置中文格式
for (int i=0; i<6; i++)
{
[numberFormatter setNumberStyle:i];
[numberFormatter setMinimumFractionDigits:2];
[numberFormatter setMaximumFractionDigits:6];
[numberFormatter setFormatterBehavior:NSNumberFormatterBehaviorDefault];
NSString *formattedNumberString = [numberFormatter stringFromNumber:[NSNumber numberWithDouble:123456.789]];

    NSLog(@"formattedNumberString :%d %@", i, formattedNumberString);
}
formatterNumberStyle对应的格式

NSNumberFormatterNoStyle
123456.789
NSNumberFormatterDecimalStyle
123,456.789
NSNumberFormatterCurrencyStyle
￥123,456.789
NSNumberFormatterPercentStyle
12,345,678.90%
NSNumberFormatterScientificStyle
1.23457E5
NSNumberFormatterSpellOutStyle
十二万三千四百五十六点七八九

NSNumber *number = [NSNumber numberWithLongLong:1234567890098765];
NSNumberFormatter *formatter = [NSNumberFormatter new];
[formatter setUsesGroupingSeparator:YES];设置用组分隔
[formatter setGroupingSize:4];//四个一组
[formatter setGroupingSeparator:@" "];组间用空格隔开
NSString *string = [formatter stringFromNumber:number];

string : 1234 5678 9009 8765

二、详解

NSNumberFormatter 应该可以满足你对数据形式的一般需求,值得了解一下.
NSNumber *num1 = [NSNumber numberWithDouble:1234567.8369];

// 四舍五入的整数
 NSString *numberNoStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterNoStyle];
 // 小数形式 NSString *numberDecimalStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterDecimalStyle]; 
// 货币形式 -- 本地化 NSString *numberCurrencyStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterCurrencyStyle]; 
// 百分数形式 NSString *numberPercentStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterPercentStyle];
 // 科学计数 NSString *numberScientificStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterScientificStyle]; 
// 朗读形式 -- 本地化 NSString *numberSpellOutStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterSpellOutStyle];
 // 序数形式 -- 本地化 NSString *numberOrdinalStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterOrdinalStyle]; 
// 货币形式 ISO -- 本地化 NSString *numberCurrencyISOStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterCurrencyISOCodeStyle];
 // 货币形式 -- 本地化 NSString *numberCurrencyPluralStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterCurrencyPluralStyle];
 // 会计计数 -- 本地化 NSString *numberCurrencyAccountingStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterCurrencyAccountingStyle];
 NSLog(@"No Style = %@",numberNoStyleStr); 
// No Style = 1234568 NSLog(@"Decimal Style = %@",numberDecimalStyleStr); 
// Decimal Style = 1,234,567.837 NSLog(@"Currency Style = %@",numberCurrencyStyleStr);
 // Currency Style = $1,234,567.84 NSLog(@"Percent Style = %@",numberPercentStyleStr); 
// Percent Style = 123,456,784% NSLog(@"Scientific Style = %@",numberScientificStyleStr); 
// Scientific Style = 1.2345678369E6 
// Spell Out Style = one million two hundred thirty-four thousand five hundred sixty-seven point eight three six nine NSLog(@"Spell Out Style = %@",numberSpellOutStyleStr); 
NSLog(@"Ordinal Style = %@",numberOrdinalStyleStr); 
// Ordinal Style = 1,234,568th NSLog(@"Currency ISO Style = %@",numberCurrencyISOStyleStr);
 // Currency ISO Style = USD1,234,567.84 NSLog(@"Currency plural Style = %@",numberCurrencyPluralStyleStr);
 // Currency plural Style = 1,234,567.84 US dollars NSLog(@"Currency accounting Style = %@",numberCurrencyAccountingStyleStr); 
// Currency accounting Style = $1,234,567.84
 // 定制格式
 NSNumberFormatter *numberFormatter = [NSNumberFormatter new]; numberFormatter.numberStyle = NSNumberFormatterDecimalStyle;
 // 格式宽度 numberFormatter.formatWidth = 15; 
// 填充符 numberFormatter.paddingCharacter = @"?"; 
// 填充位置 numberFormatter.paddingPosition = kCFNumberFormatterPadBeforeSuffix; numberFormatter.positiveSuffix = @"元"; 
NSLog(@"%@",[numberFormatter numberFromString:@"10000000元"]); 
// 10000000
 // 缩放因子,你可以将一个数缩放指定比例,然后给其添加后缀,如传入一个3000,你希望表示为3千,就要用到这个属性 
// 防止影响后面的测试,故注掉// numberFormatter.multiplier = @1000;// NSLog(@"%@千",[numberFormatter numberFromString:@"1000"]); 
// 1千
// numberFormatter.multiplier = @0.001;
// numberFormatter.positiveSuffix = @"千";
// NSLog(@"%@",[numberFormatter stringFromNumber:@10000]); 
// 10千 
// 机制不明确,负号,正号
// numberFormatter.negativeFormat = @"^";
// numberFormatter.positiveFormat = @"~0"; 
// 貌似没什么用 numberFormatter.allowsFloats = NO; numberFormatter.alwaysShowsDecimalSeparator = NO; numberFormatter.maximum = @1000; numberFormatter.minimum = @100;
 // 小数点样式 numberFormatter.decimalSeparator = @"."; 
// 零的样式 numberFormatter.zeroSymbol = @"-"; 
// 前缀和后缀 numberFormatter.positivePrefix = @"!"; numberFormatter.positiveSuffix = @"元";
 numberFormatter.negativePrefix = @"@"; 
numberFormatter.negativeSuffix = @"亏"; 
// 指定符号,与我们在前面类方法中说明的一致 NSLog(@"货币代码%@",numberFormatter.currencyCode); 
// 货币代码USD NSLog(@"货币符号%@",numberFormatter.currencySymbol); // 货币符号$ NSLog(@"国际货币符号%@",numberFormatter.internationalCurrencySymbol); 
// 国际货币符号USD NSLog(@"百分比符号%@",numberFormatter.percentSymbol); 
// 百分比符号% NSLog(@"千分号符号%@",numberFormatter.perMillSymbol); 
// 千分号符号‰ NSLog(@"减号符号%@",numberFormatter.minusSign);
 // 减号符号- NSLog(@"加号符号%@",numberFormatter.plusSign);
 // 加号符号+ NSLog(@"指数符号%@",numberFormatter.exponentSymbol); 
// 指数符号E 
// 整数最多位数 numberFormatter.maximumIntegerDigits = 10;
 // 整数最少位数 numberFormatter.minimumIntegerDigits = 2;
 // 小数位最多位数 numberFormatter.maximumFractionDigits = 3;
 // 小数位最少位数 numberFormatter.minimumFractionDigits = 1; 
// 数字分割的尺寸 numberFormatter.groupingSize = 4; 
// 除了groupingSize决定的尺寸外,其他数字位分割的尺寸 numberFormatter.secondaryGroupingSize = 2; 
// 最大有效数字个数 numberFormatter.maximumSignificantDigits = 12; 
// 最少有效数字个数 numberFormatter.minimumSignificantDigits = 3; NSLog(@"正数%@,负数%@",[numberFormatter stringFromNumber:@(+12135230.2346)],[numberFormatter stringFromNumber:@(-12135231.2346)]);
 // 正数!12,13,5230.2346元,负数@12,13,5231.2346亏 NSLog(@"零 = %@",[numberFormatter stringFromNumber:@(0)]);
 // 零 = -
 // 舍入值,比如以10为进位值,那么156就进位为160,154进位为150 numberFormatter.roundingIncrement = @10; 
// 舍入方式 numberFormatter.roundingMode = kCFNumberFormatterRoundHalfUp; NSLog(@"%@",[numberFormatter stringFromNumber:@123456.7890]);
 // !12,3460元