Swift 2.0将1000格式化为友好的K.
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我正在尝试编写一个函数来向K和M提供数千和数百万例如:
1000 = 1k
1100 = 1.1k
15000 = 15k
115000 = 115k
1000000 = 1m
这是我到目前为止的地方:
func formatPoints(num: Int) -> String {
let newNum = String(num / 1000)
var newNumString = "(num)"
if num > 1000 && num < 1000000 {
newNumString = "(newNum)k"
} else if num > 1000000 {
newNumString = "(newNum)m"
}
return newNumString
}
formatPoints(51100) // THIS RETURNS 51K instead of 51.1K
如何让这个功能起作用,我缺少什么?
答案
func formatPoints(num: Double) ->String{
let thousandNum = num/1000
let millionNum = num/1000000
if num >= 1000 && num < 1000000{
if(floor(thousandNum) == thousandNum){
return("(Int(thousandNum))k")
}
return("(thousandNum.roundToPlaces(1))k")
}
if num > 1000000{
if(floor(millionNum) == millionNum){
return("(Int(thousandNum))k")
}
return ("(millionNum.roundToPlaces(1))M")
}
else{
if(floor(num) == num){
return ("(Int(num))")
}
return ("(num)")
}
}
extension Double {
/// Rounds the double to decimal places value
func roundToPlaces(places:Int) -> Double {
let divisor = pow(10.0, Double(places))
return round(self * divisor) / divisor
}
}
如果数字是完整的,更新的代码现在应该不返回.0。现在应该输出1k而不是1.0k。我只是检查了双倍和它的地板是否相同。
我在这个问题中找到了双重扩展:Rounding a double value to x number of decimal places in swift
另一答案
以下扩展如下 -
- 将数字10456显示为10.5k,将10006显示为10k(不显示
.0
小数)。 - 将对数百万的确切做以上并格式化它,即10.5M和10M
- 将以货币格式格式化数千到9999,即使用逗号9,999
extension Double { var kmFormatted: String { if self >= 10000, self <= 999999 { return String(format: "%.1fK", locale: Locale.current,self/1000).replacingOccurrences(of: ".0", with: "") } if self > 999999 { return String(format: "%.1fM", locale: Locale.current,self/1000000).replacingOccurrences(of: ".0", with: "") } return String(format: "%.0f", locale: Locale.current,self) } }
用法:
let num: Double = 1000001.00 //this should be a Double since the extension is on Double
let millionStr = num.kmFormatted
print(millionStr)
打印1M
在这里,它正在行动 -
另一答案
extension Int {
var roundedWithAbbreviations: String {
let number = Double(self)
let thousand = number / 1000
let million = number / 1000000
if million >= 1.0 {
return "(round(million*10)/10)M"
}
else if thousand >= 1.0 {
return "(round(thousand*10)/10)K"
}
else {
return "(self)"
}
}
}
print(11.roundedWithAbbreviations) // "11"
print(11111.roundedWithAbbreviations) // "11.1K"
print(11111111.roundedWithAbbreviations) // "11.1 M"
另一答案
答案中的一些变化(对于Int和正确的百万):
func formatPoints(num: Int) ->String{
let thousandNum = num/1000
let millionNum = num/1000000
if num >= 1000 && num < 1000000{
if(thousandNum == thousandNum){
return("(thousandNum)k")
}
return("(thousandNum)k")
}
if num > 1000000{
if(millionNum == millionNum){
return("(millionNum)M")
}
return ("(millionNum)M")
}
else{
if(num == num){
return ("(num)")
}
return ("(num)")
}
}
另一答案
Swift 3中的上述解决方案(来自@qlear):
func formatPoints(num: Double) -> String {
var thousandNum = num / 1_000
var millionNum = num / 1_000_000
if num >= 1_000 && num < 1_000_000 {
if floor(thousandNum) == thousandNum {
return("(Int(thousandNum))k")
}
return("(thousandNum.roundToPlaces(1))k")
}
if num > 1_000_000 {
if floor(millionNum) == millionNum {
return "(Int(thousandNum))k"
}
return "(millionNum.roundToPlaces(1))M"
}
else{
if floor(num) == num {
return "(Int(num))"
}
return "(num)"
}
}
extension Double {
// Rounds the double to decimal places value
mutating func roundToPlaces(_ places : Int) -> Double {
let divisor = pow(10.0, Double(places))
return (self.rounded() * divisor) / divisor
}
}
另一答案
对于swift 4.0。它的工作完全正常,并根据@ user3483203回答
将Double值转换为String的函数
func formatPoints(num: Double) ->String{
var thousandNum = num/1000
var millionNum = num/1000000
if num >= 1000 && num < 1000000{
if(floor(thousandNum) == thousandNum){
return("(Int(thousandNum))k")
}
return("(thousandNum.roundToPlaces(places: 1))k")
}
if num > 1000000{
if(floor(millionNum) == millionNum){
return("(Int(thousandNum))k")
}
return ("(millionNum.roundToPlaces(places: 1))M")
}
else{
if(floor(num) == num){
return ("(Int(num))")
}
return ("(num)")
}
}
进行一次Double扩展
extension Double {
/// Rounds the double to decimal places value
mutating func roundToPlaces(places:Int) -> Double {
let divisor = pow(10.0, Double(places))
return Darwin.round(self * divisor) / divisor
}
}
使用上述功能
UILABEL.text = formatPoints(num:Double(310940)!)
输出:
另一答案
要添加答案,这里是一个Swift 4.X版本,使用循环可以在必要时轻松添加/删除单位:
extension Double {
var shortStringRepresentation: String {
if self.isNaN {
return "NaN"
}
if self.isInfinite {
return "(self < 0.0 ? "-" : "+")Infinity"
}
let units = ["", "k", "M"]
var interval = self
var i = 0
while i < units.count - 1 {
if abs(interval) < 1000.0 {
break
}
i += 1
interval /= 1000.0
}
// + 2 to have one digit after the comma, + 1 to not have any.
// Remove the * and the number of digits argument to display all the digits after the comma.
return "(String(format: "%0.*g", Int(log10(abs(interval))) + 2, interval))(units[i])"
}
}
例子:
$ [1.5, 15, 1000, 1470, 1000000, 1530000, 1791200000].map { $0.shortStringRepresentation }
[String] = 7 values {
[0] = "1.5"
[1] = "15"
[2] = "1k"
[3] = "1.5k"
[4] = "1M"
[5] = "1.5M"
[6] = "1791.2M"
}
另一答案
基于@qlear的解决方案。 我注意到如果数字正好是1000000,它将返回1000000未格式化。 所以我把它添加到函数中。我还包括负值..因为不是每个人都在赚钱!
func formatPoints(num: Double) ->String{
let thousandNum = num/1000
let millionNum = num/1000000
if num > 0
{
if num >= 1000 && num < 1000000{
if(floor(thousandNum) == thousandNum){
return("(Int(thousandNum))k")
}
return("(round1(thousandNum, toNearest: 0.01))k")
}
if num > 1000000{
if(floor(millionNum) == millionNum){
return("(Int(thousandNum))k")
}
return ("(round1(millionNum, toNearest: 0.01))M")
}
else if num == 1000000
{
return ("(round1(以上是关于Swift 2.0将1000格式化为友好的K.的主要内容,如果未能解决你的问题,请参考以下文章
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