Convert entire string into integer and display it in textfield swift

Question

I want to develop an application that can convert UITextField values into integer, float and double. I am facing problem to convert String value into Integer. Can anyone suggest the better way for conversion. I have tried the following code but it didn't worked for Swift 4 and Xcode 10.

let result = txtTotakeInput.text    
var newSTrings = Int(result!)

Thanks in advance.

You have to add ! . see my code var newSTrings = Int(result!)! . you have to enter only numeric value into textfield. — Vishal Patel, Mar 19 '19 at 05:05

Sunil Sharma · Accepted Answer · 2019-03-19T05:22:22.417

1

A better and safer way to handle all three types Int, Float and Double will be

let result = txtTotakeInput.text   
if let intVal = Int(result ?? "") {
    // Use interger
}
else if let floatVal = Float(result ?? "") {
    // Use float
}
else if let doubleVal = Double(result ?? "") {
    // Use double
}
else {
    print("User has not entered integer, float or double")
}

edited Mar 19 '19 at 05:22

answered Mar 19 '19 at 05:11

Sunil Sharma

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score 0 · Answer 2 · answered Mar 19 '19 at 05:07

Int.init(_ string) returns an optional, since its possible that the string is not an integer. So you can either make newStrings optional like var newSTrings = result.flatMap(Int.init) or nil coalesce it to zero or some other default var newSTrings = result.flatMap(Int.init) ?? 0

Convert entire string into integer and display it in textfield swift

2 Answers2