Convert an array of String to array of float in swift

Question

I am building an iOS application using Swift Language. Inside my ViewController2, i have an array of String. How do i convert this array of String to an array of Float value? toPass1 stores numerical values that user enters through the UITextField.

var toPass1 = [String]()
var force = [Float] ()

rakeshbs · Accepted Answer · 2015-01-21 13:52:57Z

7

You can do this

var toPass1 : [String] = ["1.0","2.90","23"]

var force = toPass1.map{
    ($0 as NSString).floatValue
}

answered Jan 21, 2015 at 13:52

rakeshbs

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1 Comment

Cherry_thia Over a year ago

It gives an error stating that ViewController does not have a member named 'toPass1' Part of the code is here [link] (github.com/cherrythia/arraystringstoarrayfloat)

Alvaro · Accepted Answer · 2015-01-21 15:16:32Z

2

Here is an alternative:

var toPass : [String] = ["21.0","3.12","23"]
var force = [Float]()

for item in toPass {
    force.append((item as NSString).floatValue)
}

answered Jan 21, 2015 at 15:16

Alvaro

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Comments

kwl · Accepted Answer · 2020-10-08 15:36:16Z

1

let toPass = ["1.2", "-15", "4.137e+02"]
let force = toPass.map { Float($0)! }

answered Oct 8, 2020 at 15:36

kwl

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