I'd like to change my large numbers from 100,000 to $100K if this is possible.
This is what I have so far:
let valueFormatter = NSNumberFormatter()
valueFormatter.locale = NSLocale.currentLocale()
valueFormatter.numberStyle = .CurrencyStyle
valueFormatter.maximumFractionDigits = 0
My Question
Using NSNumberFormatter, how can I output $100K rather than $100,000?
My original question:
This is what I have so far:
self.lineChartView.leftAxis.valueFormatter = NSNumberFormatter()
self.lineChartView.leftAxis.valueFormatter?.locale = NSLocale.currentLocale()
self.lineChartView.leftAxis.valueFormatter?.numberStyle = .CurrencyStyle
self.lineChartView.leftAxis.valueFormatter?.maximumFractionDigits = 0
Which Translates to:
let valueFormatter = NSNumberFormatter()
valueFormatter.locale = NSLocale.currentLocale()
valueFormatter.numberStyle = .CurrencyStyle
valueFormatter.maximumFractionDigits = 0
My output looks like this:
My Question
Using NSNumberFormatter, how can I output $100K rather than $100,000?
update:
I wanted to provide context as to whats going on, watch comments.
func setDollarsData(months: [String], range: Double) {
var dataSets: [LineChartDataSet] = [LineChartDataSet]()
var yVals: [ChartDataEntry] = [ChartDataEntry]()
for var i = 0; i < months.count; i++ {
// I'm adding my values here in value:, value takes a Double
yVals.append(ChartDataEntry(value: county[userFavs[0]]![i], xIndex: i))
}
let set1: LineChartDataSet = LineChartDataSet(yVals: yVals, label: self.userFavs[0])
set1.axisDependency = .Left
set1.setColor(UIColor.redColor().colorWithAlphaComponent(0.5))
set1.setCircleColor(UIColor.redColor())
set1.lineWidth = 2.0
set1.circleRadius = 6.0
set1.fillAlpha = 65 / 255.0
dataSets.append(set1)
let data: LineChartData = LineChartData(xVals: months, dataSets: dataSets)
data.setValueTextColor(UIColor.whiteColor())
// this is where I set the number formatter
self.lineChartView.gridBackgroundColor = UIColor.darkGrayColor()
self.lineChartView.leftAxis.startAtZeroEnabled = false
self.lineChartView.leftAxis.valueFormatter = NSNumberFormatter()
self.lineChartView.leftAxis.valueFormatter?.locale = NSLocale.currentLocale()
self.lineChartView.leftAxis.valueFormatter?.numberStyle = .CurrencyStyle
self.lineChartView.leftAxis.valueFormatter?.maximumFractionDigits = 0
// set it to the chart // END OF THE LINE
self.lineChartView.data = data // outputs to my chart
}
As you can see, once I dump the numbers into yVals, I lose access to them so those extensions will only work if I hack into the framework.
edit/update
Swift 3 or later
extension FloatingPoint {
var kFormatted: String {
return String(format: self >= 1000 ? "$%.0fK" : "$%.0f", (self >= 1000 ? self/1000 : self) as! CVarArg )
}
}
The you can use it like this to format your output:
10.0.kFormatted // "$10"
100.0.kFormatted // "$100"
1000.0.kFormatted // "$1K"
10000.0.kFormatted // "$10K"
162000.0.kFormatted // "$162K"
153000.0.kFormatted // "$153K"
144000.0.kFormatted // "$144K"
135000.0.kFormatted // "$135K"
126000.0.kFormatted // "$126K"
I've bumped into the same issue and solved it by implementing a custom formatter. Just started coding in Swift, so the code might not be the most idiomatic.
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
}
}
I think you can add an extension to NSNumberFormatter. Try the following, I didn't test it so let me know in the comment if it needs to be edited
extension NSNumberFormatter {
func dividedByK(number: Int)->String{
if (number % 1000) == 0 {
let numberK = Int(number / 1000)
return "\(numberK)K"
}
return "\(number)"
}
}
来源:https://stackoverflow.com/questions/33223103/nsnumberformatter-show-k-instead-of-000-in-large-numbers