SwiftUI String formatting is rounding my values to nearest whole number? - swiftui

Question

I hope you're all well!
I have a (potentially) silly question. I'm attempting to learn SwiftUI development by recreating the Instagram UI.
Right now, I'm working on the user page that shows a single user and their profile statistics. I'm seeing some weird behaviour with my string formatting.
HStack (spacing: 24){
VStack (alignment: .center, spacing: 2) {
Text(postCountString)
.font(.system(size: 16, weight: .bold))
Text("Posts")
.font(.system(size: 13, weight: .regular))
}
VStack (alignment: .center, spacing: 2) {
Text(followerCountString)
.font(.system(size: 16, weight: .bold))
Text("Followers")
.font(.system(size: 13, weight: .regular))
}
VStack (alignment: .center, spacing: 2) {
Text(followsCountString)
.font(.system(size: 16, weight: .bold))
Text("Follows")
.font(.system(size: 13, weight: .regular))
}
}
.frame(maxWidth: .infinity)
.padding(.leading, 16)
.onAppear {
postCountString = UIHelperFunctions.FormatCountNumber(number: creator.posts.count)
followerCountString = UIHelperFunctions.FormatCountNumber(number: creator.followerCount)
followsCountString = UIHelperFunctions.FormatCountNumber(number: creator.followsCount)
}
Above is the View component that shows the main statistics of a creator (Posts, Followers, Follows). When the view is displayed, it should run each statistic through my UIHelperFunction that formats the number into a nice readable string see function
import Foundation
class UIHelperFunctions {
static func FormatCountNumber(number: Int) -> String {
guard number > 1000 else {
return String(number)
}
guard number > 10000 else {
return String(format: "%.1fK", Double(number/1000))
}
guard number > 1000000 else {
return String(format: "%dK", number/1000)
}
return String(format: "%.1fM", Double(number/1000000))
}
}
// Example with input: 32495
print(UIHelperFunctions.FormatCountNumber(number: 32495)) // Output: 32K
However, when I input a value between 1000 and 10000, it returns a close value; however, it leaves the decimal place as 0. Below is an image that shows what I see on the screen when I input the value 6748. I would expect it to output 6.7K, but I'm seeing 6.0K.
Am I doing something silly? If not, am I misunderstanding how floating point maths works in SwiftUI?
Any help would be greatly appreciated; let me know if you need more context or code.
Thanks in advance :)

Answer 1

Int divided on Int will be Int, converting it to Double is too late, you need instead to divide double on double, like
guard number > 10000 else {
return String(format: "%.1fK", Double(number)/Double(1000)))
}

Answer 2

SwiftUI does formatting for us and it automatically updates the UILabel on screen when the region settings change, simply do:
Text(creator.posts.count, format: .number)
or
Text("Count: \(creator.posts.count, format: .number)")
To get the M, K etc. in the future this should work (if this ever gets approved)
extension NumberFormatter {
static var compact: NumberFormatter = {
let f = NumberFormatter()
f.numberStyle = .compact
return f
}()
}
Text(creator.posts.count, formatter: NumberFormatter.compact)