我想将数字格式化为：来自123234234234的123.234.234.234取决于用户在文本字段中键入的内容。 我不想管理货币，它不是关于货币，而是关于用户必须输入一个数字，这个数字应该正确格式化以便于阅读。
不带逗号，带点。
我在整个研究中发现只有货币的东西
答案 0 :(得分：12)
您所寻找的内容可能是NumberFormatter
groupingSeparator
let formater = NumberFormatter()
formater.groupingSeparator = "."
formater.numberStyle = .decimal
let formattedNumber = formater.string(from: number)
答案 1 :(得分：6)
您可以使用let yourNumber = 123234234234
let numberFormatter = NumberFormatter()
numberFormatter.numberStyle = NumberFormatter.Style.decimal
numberFormatter.groupingSeparator = "."
let formattedNumber = numberFormatter.string(from: NSNumber(value:yourNumber))
：
fetch(data.defaults + 'returnSqlRes.php',
{
headers: {'Accept': 'application/json', 'Content-Type': 'application/json'},
method: "post",
body: JSON.stringify(data.sql)
})
.then(status)
.then(json)
.then(function (sData) {
var dt={};
dt['o']=data.tableId;
dt['data']=sData;
_.forEach(dt.data[0],function (row) {
row.DT_RowId = composeId(data.pk, row);
_.forEach( data.tableCols,function (o, index) {
if (_.has(o, 'complexList')) {
var fieldName = o.attr.desigColumn ? o.attr.desigColumn : o.attr.name;
var field = o.name;
var keys = returnListKeys(o);
var search = '';
_.forEach( keys, function (name, i) {
if (i < keys.length - 1) {
search += row[name] + '@';
} else {
search += row[name];
}
});
var result = _.find(data.loadedData[getComplexListIndex(o)], {VAL: search});
if (result == undefined) {
row[field] = "";
} else {
row[field] = result[fieldName];
}
}
});
});
self.postMessage(downloadCSV(dt));
答案 2 :(得分：6)
import Foundation
extension String { var toLocale: Locale { return Locale(identifier: self) } }
extension NumberFormatter {
convenience init(numberStyle: NumberFormatter.Style, groupingSeparator: String?, decimalSeparator: String?) {
self.init()
set(numberStyle: numberStyle, groupingSeparator: groupingSeparator, decimalSeparator: decimalSeparator)
}
convenience init(numberStyle: NumberFormatter.Style, locale: Locale) {
self.init()
set(numberStyle: numberStyle, locale: locale)
}
func set(numberStyle: NumberFormatter.Style, groupingSeparator: String?, decimalSeparator: String?) {
self.locale = nil
self.numberStyle = numberStyle
self.groupingSeparator = groupingSeparator
self.decimalSeparator = decimalSeparator
}
func set(numberStyle: NumberFormatter.Style, locale: Locale?) {
self.numberStyle = numberStyle
self.locale = locale
}
}
extension Numeric {
func format(formatter: NumberFormatter) -> String? {
if let num = self as? NSNumber { return formatter.string(from: num) }
return nil
}
}
let formatter = NumberFormatter(numberStyle: .decimal, locale: "fr_FR".toLocale)
print(value.format(formatter: formatter))
formatter.set(numberStyle: .decimal, groupingSeparator: " ", decimalSeparator: ".")
print(value.format(formatter: formatter))
不要忘记在此处添加解决方案代码
func test<T: Numeric>(value: T) {
print("=========================================================")
print("\(T.self), value = \(value)")
let formatter = NumberFormatter(numberStyle: .decimal, locale: "fr_FR".toLocale)
print(value.format(formatter: formatter) ?? "nil")
formatter.set(numberStyle: .currency, locale: "de_DE".toLocale)
print(value.format(formatter: formatter) ?? "nil")
formatter.set(numberStyle: .decimal, groupingSeparator: " ", decimalSeparator: ".")
print(value.format(formatter: formatter) ?? "nil")
}
func print(title: String, value: String?) {
if let value = value { print("\(title) \(value)") }
}
test(value: Int(10000))
test(value: Double(10000.231))
test(value: Float(10000.231))
=========================================================
Int, value = 10000
10 000
10.000,00 €
10 000
=========================================================
Double, value = 10000.231
10 000,231
10.000,23 €
10 000.231
=========================================================
Float, value = 10000.231
10 000,231
10.000,23 €
10 000.231
答案 3 :(得分：2)
对于前导零（Swift 5.2）
String(format: "%02d", intNumber) // 6 -> "06"
String(format: "%03d", intNumber) // 66 -> "066"
String(format: "%04d", intNumber) // 666 -> "0666"
答案 4 :(得分：1)
swift 4
extension Int {
func formatnumber() -> String {
let formater = NumberFormatter()
formater.groupingSeparator = "."
formater.numberStyle = .decimal
return formater.string(from: NSNumber(value: self))!
}
}
答案 5 :(得分：1)
实际上有一个更简单的解决方案（无需创建try/except实例），并且它考虑了用户的语言：
NumberFormatter使用英语的值1000000的结果：
1,000,000
俄语：
1 000 000
p.s。在Android中与let result = String(format: "%ld %@", locale: Locale.current, viewCount, "views")
答案 6 :(得分：0)
对于swift 4，我实现了一个扩展，我可以选择格式，如果没有选择则使用默认格式。
extension Int {
func formatnumber(groupingSeparator: String?) -> String {
let formater = NumberFormatter()
formater.groupingSeparator = (groupingSeparator != nil) ? groupingSeparator! : ","
formater.numberStyle = .decimal
return formater.string(from: NSNumber(value: self))!
}
}
答案 7 :(得分：-1)
我的脚本为例：
1）将扩展名添加到项目
extension String {
public func subString(startIndex: String.Index, endIndex: String.Index) -> String {
return String(self[startIndex...endIndex])
}
public func subString(_ from: Int, _ to: Int) -> String {
let startIndex = self.index(self.startIndex, offsetBy: from)
let endIndex = self.index(self.startIndex, offsetBy: to)
return String(self[startIndex...endIndex])
}
}
2）创建文件 Utilites.swift 并添加我的方法
public func priceNumFormat(_ number: String)->String{
var formattedNumber = number
var print = number
var prefix = ""
if number.range(of:"-") != nil {
let index = number.index(of:"-")
formattedNumber.remove(at: index ?? formattedNumber.endIndex)
prefix = "-"
}
if formattedNumber.range(of:".") != nil {
let index = formattedNumber.index(of:".")
formattedNumber = formattedNumber.subString(startIndex: formattedNumber.startIndex, endIndex: index ?? formattedNumber.endIndex)
formattedNumber.remove(at: index ?? formattedNumber.endIndex)
}
if formattedNumber.count == 8 //10 000 000
{
let num0 = formattedNumber.subString(0, 1)
let num1 = formattedNumber.subString(2, 4)
let num2 = formattedNumber.subString(5, 7)
print = "\(num0) \(num1) \(num2)"
}
if formattedNumber.count == 7 //1 000 000
{
let num0 = formattedNumber.subString(0, 0)
let num1 = formattedNumber.subString(1, 3)
let num2 = formattedNumber.subString(4, 6)
print = "\(num0) \(num1) \(num2)"
}
if formattedNumber.count == 6 //100 000
{
let num0 = formattedNumber.subString(0, 2)
let num1 = formattedNumber.subString(3, 5)
print = "\(num0) \(num1)"
}
if formattedNumber.count == 5 //10 000
{
let num0 = formattedNumber.subString(0, 1)
let num1 = formattedNumber.subString(2, 4)
print = "\(num0) \(num1)"
}
if formattedNumber.count == 4 //1 000
{
let num0 = formattedNumber.subString(0, 0)
let num1 = formattedNumber.subString(1, 3)
print = "\(num0) \(num1)"
}
if formattedNumber.count == 3 //100
{
print = formattedNumber
}
if prefix.count > 0
{
print = "- \(print)"
}
return print;
}
3）在您的UIController中添加代码
let utils = Utilites()
private func test(){
var price = self.utils.priceNumFormat("-12345678.000")
print("\(price)") //-12 345 678
price = self.utils.priceNumFormat("-1234567.000")
print("\(price)") //-1 234 567
price = self.utils.priceNumFormat("-123456.000")
print("\(price)") //-123 456
price = self.utils.priceNumFormat("-12345.000")
print("\(price)") //-12 345
price = self.utils.priceNumFormat("-1234.000")
print("\(price)") //-1 234
price = self.utils.priceNumFormat("-123.000")
print("\(price)") //-123
}