NSNumberFormatter:大量显示 'k' 而不是 ',000'?
NSNumberFormatter : Show 'k' instead of ',000' in large numbers?
如果可能的话,我想将我的大数字从 100,000 改为 100,000 美元。
这是我目前拥有的:
let valueFormatter = NSNumberFormatter()
valueFormatter.locale = NSLocale.currentLocale()
valueFormatter.numberStyle = .CurrencyStyle
valueFormatter.maximumFractionDigits = 0
我的问题
使用 NSNumberFormatter,如何输出 $100K 而不是 $100,000?
我原来的问题:
这是我目前拥有的:
self.lineChartView.leftAxis.valueFormatter = NSNumberFormatter()
self.lineChartView.leftAxis.valueFormatter?.locale = NSLocale.currentLocale()
self.lineChartView.leftAxis.valueFormatter?.numberStyle = .CurrencyStyle
self.lineChartView.leftAxis.valueFormatter?.maximumFractionDigits = 0
转换为:
let valueFormatter = NSNumberFormatter()
valueFormatter.locale = NSLocale.currentLocale()
valueFormatter.numberStyle = .CurrencyStyle
valueFormatter.maximumFractionDigits = 0
我的输出是这样的:
我的问题
使用 NSNumberFormatter,如何输出 $100K 而不是 $100,000?
更新:
我想提供有关正在发生的事情的上下文,请观看评论。
func setDollarsData(months: [String], range: Double) {
var dataSets: [LineChartDataSet] = [LineChartDataSet]()
var yVals: [ChartDataEntry] = [ChartDataEntry]()
for var i = 0; i < months.count; i++ {
// I'm adding my values here in value:, value takes a Double
yVals.append(ChartDataEntry(value: county[userFavs[0]]![i], xIndex: i))
}
let set1: LineChartDataSet = LineChartDataSet(yVals: yVals, label: self.userFavs[0])
set1.axisDependency = .Left
set1.setColor(UIColor.redColor().colorWithAlphaComponent(0.5))
set1.setCircleColor(UIColor.redColor())
set1.lineWidth = 2.0
set1.circleRadius = 6.0
set1.fillAlpha = 65 / 255.0
dataSets.append(set1)
let data: LineChartData = LineChartData(xVals: months, dataSets: dataSets)
data.setValueTextColor(UIColor.whiteColor())
// this is where I set the number formatter
self.lineChartView.gridBackgroundColor = UIColor.darkGrayColor()
self.lineChartView.leftAxis.startAtZeroEnabled = false
self.lineChartView.leftAxis.valueFormatter = NSNumberFormatter()
self.lineChartView.leftAxis.valueFormatter?.locale = NSLocale.currentLocale()
self.lineChartView.leftAxis.valueFormatter?.numberStyle = .CurrencyStyle
self.lineChartView.leftAxis.valueFormatter?.maximumFractionDigits = 0
// set it to the chart // END OF THE LINE
self.lineChartView.data = data // outputs to my chart
}
如您所见,一旦我将数字转储到 yVals 中,我就无法访问它们,因此这些扩展只有在我入侵框架后才能工作。
我想你可以给 NSNumberFormatter 添加一个扩展。试试下面的方法,我没有测试过所以如果需要编辑请在评论中告诉我
extension NSNumberFormatter {
func dividedByK(number: Int)->String{
if (number % 1000) == 0 {
let numberK = Int(number / 1000)
return "\(numberK)K"
}
return "\(number)"
}
}
edit/update
Swift 3 或更高版本
extension FloatingPoint {
var kFormatted: String {
return String(format: self >= 1000 ? "$%.0fK" : "$%.0f", (self >= 1000 ? self/1000 : self) as! CVarArg )
}
}
您可以像这样使用它来格式化您的输出:
10.0.kFormatted // ""
100.0.kFormatted // "0"
1000.0.kFormatted // "K"
10000.0.kFormatted // "K"
162000.0.kFormatted // "2K"
153000.0.kFormatted // "3K"
144000.0.kFormatted // "4K"
135000.0.kFormatted // "5K"
126000.0.kFormatted // "6K"
我遇到了同样的问题并通过实现自定义格式化程序解决了它。 Swift 刚开始编码,所以代码可能不是最地道的。
open class KNumberFormatter : NumberFormatter {
override open func string(for obj: Any?) -> String? {
if let num = obj as? NSNumber {
let suffixes = ["", "k", "M", "B"]
var idx = 0
var d = num.doubleValue
while idx < 4 && abs(d) >= 1000.0 {
d /= 1000.0
idx += 1
}
var currencyCode = ""
if self.currencySymbol != nil {
currencyCode = self.currencySymbol!
}
let numStr = String(format: "%.1f", d)
return currencyCode + numStr + suffixes[idx]
}
return nil
}
}
如果可能的话,我想将我的大数字从 100,000 改为 100,000 美元。
这是我目前拥有的:
let valueFormatter = NSNumberFormatter()
valueFormatter.locale = NSLocale.currentLocale()
valueFormatter.numberStyle = .CurrencyStyle
valueFormatter.maximumFractionDigits = 0
我的问题
使用 NSNumberFormatter,如何输出 $100K 而不是 $100,000?
我原来的问题:
这是我目前拥有的:
self.lineChartView.leftAxis.valueFormatter = NSNumberFormatter()
self.lineChartView.leftAxis.valueFormatter?.locale = NSLocale.currentLocale()
self.lineChartView.leftAxis.valueFormatter?.numberStyle = .CurrencyStyle
self.lineChartView.leftAxis.valueFormatter?.maximumFractionDigits = 0
转换为:
let valueFormatter = NSNumberFormatter()
valueFormatter.locale = NSLocale.currentLocale()
valueFormatter.numberStyle = .CurrencyStyle
valueFormatter.maximumFractionDigits = 0
我的输出是这样的:
我的问题
使用 NSNumberFormatter,如何输出 $100K 而不是 $100,000?
更新:
我想提供有关正在发生的事情的上下文,请观看评论。
func setDollarsData(months: [String], range: Double) {
var dataSets: [LineChartDataSet] = [LineChartDataSet]()
var yVals: [ChartDataEntry] = [ChartDataEntry]()
for var i = 0; i < months.count; i++ {
// I'm adding my values here in value:, value takes a Double
yVals.append(ChartDataEntry(value: county[userFavs[0]]![i], xIndex: i))
}
let set1: LineChartDataSet = LineChartDataSet(yVals: yVals, label: self.userFavs[0])
set1.axisDependency = .Left
set1.setColor(UIColor.redColor().colorWithAlphaComponent(0.5))
set1.setCircleColor(UIColor.redColor())
set1.lineWidth = 2.0
set1.circleRadius = 6.0
set1.fillAlpha = 65 / 255.0
dataSets.append(set1)
let data: LineChartData = LineChartData(xVals: months, dataSets: dataSets)
data.setValueTextColor(UIColor.whiteColor())
// this is where I set the number formatter
self.lineChartView.gridBackgroundColor = UIColor.darkGrayColor()
self.lineChartView.leftAxis.startAtZeroEnabled = false
self.lineChartView.leftAxis.valueFormatter = NSNumberFormatter()
self.lineChartView.leftAxis.valueFormatter?.locale = NSLocale.currentLocale()
self.lineChartView.leftAxis.valueFormatter?.numberStyle = .CurrencyStyle
self.lineChartView.leftAxis.valueFormatter?.maximumFractionDigits = 0
// set it to the chart // END OF THE LINE
self.lineChartView.data = data // outputs to my chart
}
如您所见,一旦我将数字转储到 yVals 中,我就无法访问它们,因此这些扩展只有在我入侵框架后才能工作。
我想你可以给 NSNumberFormatter 添加一个扩展。试试下面的方法,我没有测试过所以如果需要编辑请在评论中告诉我
extension NSNumberFormatter {
func dividedByK(number: Int)->String{
if (number % 1000) == 0 {
let numberK = Int(number / 1000)
return "\(numberK)K"
}
return "\(number)"
}
}
edit/update
Swift 3 或更高版本
extension FloatingPoint {
var kFormatted: String {
return String(format: self >= 1000 ? "$%.0fK" : "$%.0f", (self >= 1000 ? self/1000 : self) as! CVarArg )
}
}
您可以像这样使用它来格式化您的输出:
10.0.kFormatted // ""
100.0.kFormatted // "0"
1000.0.kFormatted // "K"
10000.0.kFormatted // "K"
162000.0.kFormatted // "2K"
153000.0.kFormatted // "3K"
144000.0.kFormatted // "4K"
135000.0.kFormatted // "5K"
126000.0.kFormatted // "6K"
我遇到了同样的问题并通过实现自定义格式化程序解决了它。 Swift 刚开始编码,所以代码可能不是最地道的。
open class KNumberFormatter : NumberFormatter {
override open func string(for obj: Any?) -> String? {
if let num = obj as? NSNumber {
let suffixes = ["", "k", "M", "B"]
var idx = 0
var d = num.doubleValue
while idx < 4 && abs(d) >= 1000.0 {
d /= 1000.0
idx += 1
}
var currencyCode = ""
if self.currencySymbol != nil {
currencyCode = self.currencySymbol!
}
let numStr = String(format: "%.1f", d)
return currencyCode + numStr + suffixes[idx]
}
return nil
}
}