NSNumberFormatter 應該可以滿足你對數(shù)據(jù)形式的一般需求
NSNumberFormatter 和NSDateFormatter 是NsFormatter的子類幅垮。
NSNumberFormatter類有個屬性numberStyle链烈，它是一個枚舉型努隙，設置不同的值可以輸出不同的數(shù)字格式贬循。
1
NSNumber *num1 = [NSNumber numberWithDouble:1234567.8369];
// ==================== 類方法 ====================
// 四舍五入的整數(shù)
NSString *numberNoStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterNoStyle];
// 小數(shù)形式
NSString *numberDecimalStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterDecimalStyle];
// 貨幣形式 -- 本地化
NSString *numberCurrencyStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterCurrencyStyle];
// 百分數(shù)形式
NSString *numberPercentStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterPercentStyle];
// 科學計數(shù)
NSString *numberScientificStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterScientificStyle];
// 朗讀形式 -- 本地化
NSString *numberSpellOutStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterSpellOutStyle];
// 序數(shù)形式 -- 本地化
NSString *numberOrdinalStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterOrdinalStyle];
// 貨幣形式 -- 本地化
NSString *numberCurrencyISOStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterCurrencyISOCodeStyle];
// 貨幣形式 -- 本地化
NSString *numberCurrencyPluralStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterCurrencyPluralStyle];
// 會計計數(shù) -- 本地化
NSString *numberCurrencyAccountingStyleStr = [NSNumberFormatter localizedStringFromNumber:num1 numberStyle:NSNumberFormatterCurrencyAccountingStyle];
NSLog(@"No Style = %@",numberNoStyleStr);
NSLog(@"Decimal Style = %@",numberDecimalStyleStr);
NSLog(@"Currency Style = %@",numberCurrencyStyleStr);
NSLog(@"Percent Style = %@",numberPercentStyleStr);
NSLog(@"Scientific Style = %@",numberScientificStyleStr);
NSLog(@"Spell Out Style = %@",numberSpellOutStyleStr);
NSLog(@"Ordinal Style = %@",numberOrdinalStyleStr);
NSLog(@"Currency ISO Style = %@",numberCurrencyISOStyleStr);
NSLog(@"Currency plural Style = %@",numberCurrencyPluralStyleStr);
NSLog(@"Currency accounting Style = %@",numberCurrencyAccountingStyleStr);
2
// ==================== 定制 ====================
NSNumberFormatter *numberFormatter = [NSNumberFormatter new];
numberFormatter.numberStyle = NSNumberFormatterDecimalStyle;
// 格式寬度
numberFormatter.formatWidth = 15;
// 填充符
numberFormatter.paddingCharacter = @"?";
// 填充位置
numberFormatter.paddingPosition = kCFNumberFormatterPadBeforeSuffix;
numberFormatter.positiveSuffix = @"元";
NSLog(@"%@",[numberFormatter numberFromString:@"10000000元"]); // 10000000
// 縮放因子,你可以將一個數(shù)縮放指定比例,然后給其添加后綴,如傳入一個3000,你希望表示為3千,就要用到這個屬性
// 防止影響后面的測試,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
// 機制不明確,負號,正號
// numberFormatter.negativeFormat = @"^";
// numberFormatter.positiveFormat = @"~0";
// 貌似沒什么用
numberFormatter.allowsFloats = NO;
numberFormatter.alwaysShowsDecimalSeparator = NO;
numberFormatter.maximum = @1000;
numberFormatter.minimum = @100;
// 小數(shù)點樣式
numberFormatter.decimalSeparator = @".";
// 零的樣式
numberFormatter.zeroSymbol = @"-";
// 前綴和后綴
numberFormatter.positivePrefix = @"!";
numberFormatter.positiveSuffix = @"元";
numberFormatter.negativePrefix = @"@";
numberFormatter.negativeSuffix = @"虧";
3
// 指定符號,與我們在前面類方法中說明的一致
NSLog(@"貨幣代碼%@",numberFormatter.currencyCode); // 貨幣代碼USD
NSLog(@"貨幣符號%@",numberFormatter.currencySymbol); // 貨幣符號$
NSLog(@"國際貨幣符號%@",numberFormatter.internationalCurrencySymbol); // 國際貨幣符號USD
NSLog(@"百分比符號%@",numberFormatter.percentSymbol); // 百分比符號%
NSLog(@"千分號符號%@",numberFormatter.perMillSymbol); // 千分號符號‰
NSLog(@"減號符號%@",numberFormatter.minusSign); // 減號符號-
NSLog(@"加號符號%@",numberFormatter.plusSign); // 加號符號+
NSLog(@"指數(shù)符號%@",numberFormatter.exponentSymbol); // 指數(shù)符號E
// 整數(shù)最多位數(shù)
numberFormatter.maximumIntegerDigits = 10;
// 整數(shù)最少位數(shù)
numberFormatter.minimumIntegerDigits = 2;
// 小數(shù)位最多位數(shù)
numberFormatter.maximumFractionDigits = 3;
// 小數(shù)位最少位數(shù)
numberFormatter.minimumFractionDigits = 1;
// 數(shù)字分割的尺寸
numberFormatter.groupingSize = 4;
// 除了groupingSize決定的尺寸外,其他數(shù)字位分割的尺寸
numberFormatter.secondaryGroupingSize = 2;
// 最大有效數(shù)字個數(shù)
numberFormatter.maximumSignificantDigits = 12;
// 最少有效數(shù)字個數(shù)
numberFormatter.minimumSignificantDigits = 3;
NSLog(@"正數(shù)%@,負數(shù)%@",[numberFormatter stringFromNumber:@(+12135230.2346)],[numberFormatter stringFromNumber:@(-12135231.2346)]); // 正數(shù)!12,13,5230.2346元,負數(shù)@12,13,5231.2346虧
NSLog(@"零 = %@",[numberFormatter stringFromNumber:@(0)]); // 零 = -
// 舍入值,比如以10為進位值,那么156就進位為160,154進位為150
numberFormatter.roundingIncrement = @10;
// 舍入方式
numberFormatter.roundingMode = kCFNumberFormatterRoundHalfUp;
NSLog(@"%@",[numberFormatter stringFromNumber:@123456.7890]); // !12,3460元
