Get integer value from string in swift

Question

So I can do this   var stringNumb  NSString    1357   var someNumb  CInt   stringNumb intValue   But I can t find the way to do it w  a String   I d like to do something like   var stringNumb  String    1357   var someNumb  Int   Int stringNumb    This doesn t work either   var someNumbAlt  Int   myString integerValue

User · Answer

The method you want is toInt   -- you have to be a little careful  since the toInt   returns an optional Int   let stringNumber    1234  let numberFromString   stringNumber toInt      numberFromString is of type Int  with value 1234  let notANumber    Uh oh  let wontBeANumber   notANumber toInt      wontBeANumber is of type Int  with value nil

User · Answer

Swift 2 0 you can initialize Integer using constructor  var stringNumber    1234  var numberFromString   Int stringNumber

User · Answer

above answer didnt help me as my string value was  700 00   with Swift 2 2 this works for me  let myString    700 00  let myInt    myString as NSString  integerValue   I passed myInt to NSFormatterClass   let formatter   NSNumberFormatter   formatter numberStyle    CurrencyStyle formatter maximumFractionDigits   0  let priceValue   formatter stringFromNumber myInt       Now priceValue is   700   Thanks to this blog post

User · Answer

A more general solution could be a extension  extension String       var toFloat Float           return Float self bridgeToObjectiveC   floatValue            var toDouble Double                                   this for example extends the swift native String object by toFloat

User · Answer

8 1 Odds     var stringNumb  String    1357  var someNumb   Int stringNumb    or  var stringNumb  String    1357  var someNumb Int    Int stringNumb    Int String  returns an optional Int   not an Int     Safe use  do not explicitly unwrap  let unwrapped Int   Int stringNumb     0   or  if let stringNumb Int   stringNumb               None of the answers actually addressed why var someNumb  Int   Int stringNumb  was not working

User · Answer

I d use   var stringNumber    1234  var numberFromString   stringNumber toInt   println numberFromString    Note toInt        If the string represents an integer that fits into an Int  returns the corresponding integer

User · Answer

I wrote an extension for that purpose  It always returns an Int  If the string does not fit into an Int  0 is returned   extension String       func toTypeSafeInt   - gt  Int           if let safeInt   self toInt                 return safeInt           else               return 0

User · Answer

If you are able to use a NSString only   It s pretty similar to objective-c  All the data type are there but require the as NSString addition      var x    400 0  as NSString       x floatValue   string to float     x doubleValue    to double     x boolValue    to bool     x integerValue    to integer     x intValue    to int   Also we have an toInt   function added See Apple Inc     The Swift Programming Language     iBooks  https   itun es us jEUH0 l page 49  x toInt

User · Answer

Simple but dirty way     Swift 1 2 if let intValue    42  toInt         let number1   NSNumber integer intValue       Swift 2 0 let number2   Int stringNumber      Using NSNumber let number3   NSNumber float   42 42  as NSString  floatValue    The extension-way  This is better  really  because it ll play nicely with locales and decimals    extension String        var numberValue NSNumber            let formatter   NSNumberFormatter           formatter numberStyle    DecimalStyle         return formatter numberFromString self            Now you can simply do   let someFloat    42 42  numberValue let someInt    42  numberValue

User · Answer

In Swift 3 0   Type 1  Convert NSString to String      let stringNumb NSString    1357      let someNumb   Int stringNumb as String     1357 as integer   Type 2  If the String has Integer only      let stringNumb    1357      let someNumb   Int stringNumb     1357 as integer   Type 3  If the String has Float value      let stringNumb    13 57      if let stringToFloat   Float stringNumb           let someNumb   Int stringToFloat    13 as Integer      else           do something if the stringNumb not have digit only   i e    let stringNumb    13er4

User · Answer

Convert String to Int in Swift 2 0   var str NSString   Data as  NSString var cont Int   str integerValue   use  intergerValue or intValue for Int32

User · Answer

You can bridge from String to NSString and convert from CInt to Int like this   var myint  Int   Int stringNumb bridgeToObjectiveC   intValue

[swift] Get integer value from string in swift

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