Need to keep same # of digits in timer (Swift)

Question

I have a timer that goes 1.1 1.2 1.3 1.4 etc but then it goes 1.499999999 1.59999999 1.69999999 1.79999999 and on. I need it to stay with the original 2 digits. How do I do this? Here's the update function for my timer:

 func update() {
    // Something Swag
    if timerRunning == true{


        timerCountM += 0.1

        duringPlayTimerLbl.text = "\(timerCountM)"
    }else{

    }

}

why does it need to be a `Double`? Maybe add the code where you use it as a `Double` — R Menke, Mar 05 '16 at 20:19
`duringPlayTimerLbl.text = String(format: "%.1f", timerCountM)` — vacawama, Mar 05 '16 at 22:57

Shades · Accepted Answer · 2016-03-05T20:26:06.620

0

let fmt = NSNumberFormatter()
fmt.locale = NSLocale(localeIdentifier: "en_US_POSIX")
fmt.maximumFractionDigits = 2 // Change this to the maximum decimals places
fmt.minimumFractionDigits = 0 // Minimum decimals. Make same as maximum to always have that amount

 func update() {
    // Something Swag
    if timerRunning {

        timerCountM += 0.1

        let formattedTimer = fmt.stringFromNumber(timerCountM)!

        duringPlayTimerLbl.text = "\(formattedTimer)"

    }else{

    }

}

edited Mar 05 '16 at 20:26

answered Mar 05 '16 at 20:20

Shades

5,568
7
30
48

1

Terrible solution.you are creating a new formatter over and over again – Leo Dabus Mar 05 '16 at 20:23
Btw to compare a bool == true is redundant. Only needed when used with optionals – Leo Dabus Mar 05 '16 at 20:24
@LeoDabus You're right, I moved it outside of the function. Make formatter global – Shades Mar 05 '16 at 20:27
how do i make it global and whats the difference? @Shades – Andy Lebowitz Mar 06 '16 at 16:06
When it's inside the update() function, it's being created each time update() gets called, which is a lot. – Shades Mar 06 '16 at 20:01

score 0 · Answer 2 · answered Mar 05 '16 at 20:32

0

You can make timerCountM to be Int and do:

timerCountM += 1
text = "\(Double(timerCountM)/10)"

answered Mar 05 '16 at 20:32

0x416e746f6e

9,872
5
40
68

Need to keep same # of digits in timer (Swift)

2 Answers2