Get class name of object as string in Swift

Question

Getting the classname of an object as String using   object getClassName myViewController    returns something like this    TtC5AppName22CalendarViewController   I am looking for the pure version   CalendarViewController   How do I get a cleaned up string of the class name instead    I found some attempts of questions about this but not an actual answer  Is it not possible at all

User · Answer

Try reflect   summary on Class self or instance dynamicType   Unwrap optionals before getting dynamicType otherwise the dynamicType is the Optional wrapper   class SampleClass   class InnerClass     let sampleClassName   reflect SampleClass self  summary  let instance   SampleClass    let instanceClassName   reflect instance dynamicType  summary  let innerInstance   SampleClass InnerClass    let InnerInstanceClassName   reflect innerInstance dynamicType  summary pathExtension  let tupleArray     Int  String Int       let tupleArrayTypeName   reflect tupleArray dynamicType  summary    The summary is a class path with generic types described   To get a simple class name from the summary try this method   func simpleClassName  complexClassName String   - gt  String       var result   complexClassName      var range   result rangeOfString    lt          if   nil    range     result   result substringToIndex  range  startIndex          range   result rangeOfString             if   nil    range     result   result pathExtension        return result

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UPDATED TO SWIFT 5  We can get pretty descriptions of type names using the instance variable through the String initializer and create new objects of a certain class    Like  for example print String describing  type of  object     Where object can be an instance variable like array  a dictionary  an Int  a NSDate  etc   Because NSObject is the root class of most Objective-C class hierarchies  you could try to make an extension for NSObject to get the class name of every subclass of NSObject  Like this   extension NSObject       var theClassName  String           return NSStringFromClass type of  self             Or you could make a static funcion whose parameter is of type Any  The protocol to which all types implicitly conform  and returns the class name as String  Like this   class Utility      class func classNameAsString   obj  Any  - gt  String             prints more readable results for dictionaries  arrays  Int  etc         return String describing  type of  obj              Now you can do something like this   class ClassOne   UIViewController     some code here      class ClassTwo   ClassOne     some code here       class ViewController  UIViewController        override func viewDidLoad             super viewDidLoad               Get the class name as String         let dictionary   String  CGFloat                let array   Int               let int   9         let numFloat  CGFloat   3 0         let numDouble  Double   1 0         let classOne   ClassOne           let classTwo  ClassTwo    ClassTwo           let now   NSDate           let lbl   UILabel            print  dictionary   String  CGFloat        - gt    Utility classNameAsString dictionary             print  array   Int       - gt    Utility classNameAsString array             print  int   9 - gt    Utility classNameAsString int             print  numFloat  CGFloat   3 0 - gt    Utility classNameAsString numFloat             print  numDouble  Double   1 0 - gt    Utility classNameAsString numDouble             print  classOne   ClassOne   - gt     ClassOne  self      we use the Extension         if classTwo    nil               print  classTwo  ClassTwo    ClassTwo   - gt    Utility classNameAsString classTwo        now we can use a Forced-Value Expression and unwrap the value                   print  now   Date   - gt    Utility classNameAsString now             print  lbl   UILabel   - gt    String describing  type of  lbl         we use the String initializer directly            Also  once we can get the class name as String  we can instantiate new objects of that class      Instantiate a class from a String print   nInstantiate a class from a String   let aClassName   classOne theClassName let aClassType   NSClassFromString aClassName  as  NSObject Type let instance   aClassType init      we create a new object print String cString  class getName type of  instance     print instance self is ClassOne    Maybe this helps someone out there

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If you don t like the mangled name  you can dictate your own name    objc CalendarViewController  class CalendarViewController   UIViewController                  However  it would be better in the long run to learn to parse the mangled name  The format is standard and meaningful and won t change

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You can extend NSObjectProtocol in Swift 4 like this    import Foundation  extension NSObjectProtocol        var className  String           return String describing  Self self            This will make calculated variable className available to ALL classes  Using this inside a print   in CalendarViewController will print  CalendarViewController  in console

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I suggest such an approach  very Swifty       Swift 3 func typeName   some  Any  - gt  String       return  some is Any Type       some        type of  some          Swift 2 func typeName some  Any  - gt  String       return  some is Any Type       some        some dynamicType       It doesn t use neither introspection nor manual demangling  no magic       Here is a demo      Swift 3  import class Foundation NSObject  func typeName   some  Any  - gt  String       return  some is Any Type       some        type of  some       class GenericClass lt T gt        var x  T    nil    protocol Proto1       func f x  Int  - gt  Int      objc ObjCClass1  class Class1  NSObject  Proto1       func f x  Int  - gt  Int           return x          struct Struct1       var x  Int    enum Enum1       case X    print typeName GenericClass lt Int gt  self      GenericClass lt Int gt  print typeName GenericClass lt Int gt          GenericClass lt Int gt   print typeName Proto1 self      Proto1  print typeName Class1 self        Class1 print typeName Class1        Class1 print typeName Class1   f       Int  - gt  Int  print typeName Struct1 self      Struct1 print typeName Struct1 x  1       Struct1 print typeName Enum1 self      Enum1 print typeName Enum1 X      Enum1

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I use it in Swift 2 2  guard let currentController   UIApplication topViewController   else   return   currentController classForCoder description   componentsSeparatedByString      last

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Swift 5  Way 1  print  quot Class   String describing  self    Function    function   line    line  quot   Output  Class   lt Test ViewController  0x7ffaabc0a3d0 gt   Function  viewDidLoad    line  15 Way 2  print  quot Class   String describing  type of  self     Function    function   line    line  quot   Output  Class  ViewController  Function  viewDidLoad    line  16

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Swift 5 2   String describing  type of  self

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To get the type name as a string in Swift 4  I haven t checked the earlier versions   just use string interpolation      type of  myViewController      You can use  self on a type itself  and the type of    function on an instance      Both constants will have  UIViewController  as their value let stringFromType      UIViewController self   let stringFromInstance      type of  UIViewController

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Swift 5 1  -  You can also use generic function for get class name of object as string  struct GenericFunctions    static func className lt T gt    name  T  - gt  String           return    name              Call this function by using following -   let name   GenericFunctions className ViewController self    Happy Coding

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You can try this way   self classForCoder description

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Swift 3 0  You can create an extension like this one   It gives back the class name without the project name  extension NSObject       var className  String           return NSStringFromClass self as  AnyClass  components separatedBy       last                  public class var className  String           return NSStringFromClass self  components separatedBy       last

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Swift 3 0  macOS 10 10 and later   you can get it from className  self className components separatedBy       last

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This kind of example for class var  Don t include the name of bundle   extension NSObject       class var className  String           return    self

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You can use the Swift standard library function called  stdlib getDemangledTypeName like this   let name    stdlib getDemangledTypeName myViewController

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If you have type Foo  the following code will give you  Foo  in Swift 3 and Swift 4   let className   String describing  Foo self     Gives you  Foo    The problem with most of the answers on here are that they give you  Foo Type  as the resulting string when you don t have any instance of the type  when what you really want is just  Foo   The following gives you  Foo Type   as mentioned in a bunch of the other answers   let className   String describing  type of  Foo self      Gives you  Foo Type    The type of   part is unnecessary if you just want  Foo

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One can also use mirrors   let vc   UIViewController    String Mirror reflecting  vc  subjectType    NB  This method can also be used for Structs and Enums  There is a displayStyle that gives an indication of what type of the structure   Mirror reflecting  vc  displayStyle   The return is an enum so you can   Mirror reflecting  vc  displayStyle     Class

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I ve been looking for this answer off and on for a while   I use GKStateMachine and like to observe state changes and wanted an easy way to see just the class name   I m not sure if it s just iOS 10 or Swift 2 3  but in that environment  the following does exactly what I want   let state GKState  print  Class Name    String state classForCoder        Output         Class Name  GKState

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In my case String describing  self  returned something like       lt  My project ExampleViewController  0x10b2bb2b0    But I d like to have something like getSimpleName on Android   So I ve created a little extension   extension UIViewController        func getSimpleClassName   - gt  String           let describing   String describing  self          if let dotIndex   describing index of        let commaIndex   describing index of                     let afterDotIndex   describing index after  dotIndex              if afterDotIndex  lt  commaIndex                    return String describing afterDotIndex    lt  commaIndex                                   return describing            And now it returns      ExampleViewController   Extending NSObject instead of UIViewController should also work  Function above is also fail-safe

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In Swift 4 1 and now Swift 4 2    import Foundation  class SomeClass       class InnerClass           let foo  Int          init foo  Int                self foo   foo                      let foo  Int      init foo  Int            self foo   foo          class AnotherClass   NSObject       let foo  Int      init foo  Int            self foo   foo         super init            struct SomeStruct       let bar  Int      init bar  Int            self bar   bar          let c   SomeClass foo  42  let s   SomeStruct bar  1337  let i   SomeClass InnerClass foo  2018  let a   AnotherClass foo  1 lt  lt 8    If you don t have an instance around   String describing  SomeClass self     Result  SomeClass String describing  SomeStruct self     Result  SomeStruct String describing  SomeClass InnerClass self     Result  InnerClass String describing  AnotherClass self     Result  AnotherClass   If you do have an instance around   String describing  type of  c      Result  SomeClass String describing  type of  s      Result  SomeStruct String describing  type of  i      Result  InnerClass String describing  type of  a      Result  AnotherClass

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The above solutions didn t work for me  The produced mostly the issues mention in several comments      MyAppName ClassName   or     MyFrameWorkName ClassName   This solutions worked on XCode 9  Swift 3 0   I named it classNameCleaned so it is easier to access and doesn t conflict with future className   changes   extension NSObject    static var classNameCleaned   String        let className   self className       if className contains                let namesArray   className components separatedBy               return namesArray last    className       else           return self className                 Usage   NSViewController classNameCleaned MyCustomClass classNameCleaned

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Sometimes the other solutions will give a non useful name depending on what object you are trying to look at  In that case you can get the class name as a string using the following   String cString  object getClassName Any        click the function in xcode to see some related methods that are fairly useful  or check here https   developer apple com reference objectivec objective c functions

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Swift 5 1  You can get class  struct  enum  protocol and NSObject names though Self self   print    Self self

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Swift 5      NSStringFromClass CustomClass self

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To get name of a Swift class from an object  e g  for var object  SomeClass    use  String describing  type of  object     To get name of a Swift class from a class type  e g  SomeClass  use   String describing  SomeClass self    Output       SomeClass

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I tried type of      in Playground with Swift 3  This is my result  This is the code format version   print String describing  type of  UIButton self    print String describing  type of  UIButton      UIButton Type UIButton

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Swift 3 0  String describing  MyViewController self

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String from an instance  String describing  self   String from a type  String describing  YourType self   Example  struct Foo           Instance Level     var typeName  String           return String describing  Foo self                Instance Level - Alternative Way     var otherTypeName  String           let thisType   type of  self          return String describing  thisType                Type Level     static var typeName  String           return String describing  self            Foo   typeName             quot Foo quot  Foo   otherTypeName        quot Foo quot  Foo typeName               quot Foo quot   Tested with class  struct and enum

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Swift 5  Here is the extension to get the typeName as a variable  work with both value type or reference type    protocol NameDescribable       var typeName  String   get       static var typeName  String   get      extension NameDescribable       var typeName  String           return String describing  type of  self              static var typeName  String           return String describing  self            How to use      Extend with class struct enum    extension NSObject  NameDescribable    extension Array  NameDescribable    extension UIBarStyle  NameDescribable      print UITabBarController   typeName  print UINavigationController typeName  print  Int    typeName  print UIBarStyle typeName      Out put  UITabBarController UINavigationController Array lt Int gt  UIBarStyle

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To get class name as String declare your class as following   objc YourClassName  class YourClassName     And get class name using following syntax  NSStringFromClass YourClassName

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You can get the name of the class doing something like   class Person    String describing  Person self

[swift] Get class name of object as string in Swift

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