CODEWITHSUNDEEP
iosswiftswift4
Lukas Bimba
Lukas Bimba

Reputation: 826

Swift 4 Conversion Segmentation Fault: 11

Need help converting some code to Swift 4. Starting getting errors and not sure how to convert this piece of code. I am having trouble with String and doubleValue. 

let distanceInMeters: Double = userLocation.distance(from: businessLocation)
let distanceInMiles: Double = ((distanceInMeters.description as? String).doubleValue * 0.00062137)
let distanceLabelText = "\(distanceInMiles.string(2)) miles away"

Segmentation Fault 11 File

Upvotes: 0

Views: 542

Answers (2)

glyvox
glyvox

Reputation: 58049

You are converting a String back and forth unnecessarily. Moreover, you should use String formatters to print doubles with a given precision.

Here is your code in a cleaner format:

let distanceInMeters = userLocation.distance(from: businessLocation)
let distanceInMiles = distanceInMeters * 0.00062137
let distanceLabelText = String(format: "%.2f miles away", distanceInMiles)

Upvotes: 5

mag_zbc
mag_zbc

Reputation: 6982

distanceInMeters is a Double, which you try to convert to String, which you then try to convert back to Double. Why? Just do

let distanceInMiles: Double = distanceInMeters * 0.00062137

As for 

distanceInMiles.string(2)

Double no longer has a string method - just use Strings initializer

let distanceLabelText = "\(String(distanceInMiles)) miles away"

Upvotes: 1

Related Questions