How do I test which class an object is in Objective-C

Question

How do I test whether an object is an instance of a particular class in Objective-C  Let s say I want to see if object a is an instance of class b  or class c  how do I go about doing it

User · Answer

You also can use   NSString  className     myObject class  description      on any NSObject

User · Answer

What means about isKindOfClass in Apple Documentation  Be careful when using this method on objects represented by a class cluster  Because of the nature of class clusters  the object you get back may not always be the type you expected  If you call a method that returns a class cluster  the exact type returned by the method is the best indicator of what you can do with that object  For example  if a method returns a pointer to an NSArray object  you should not use this method to see if the array is mutable  as shown in the following code      DO NOT DO THIS  if   myArray isKindOfClass  NSMutableArray class             Modify the object     If you use such constructs in your code  you might think it is alright to modify an object that in reality should not be modified  Doing so might then create problems for other code that expected the object to remain unchanged

User · Answer

You can also check run time  Put one breakpoint in code and inside  lldb  console write   lldb  po  yourObject class    Like this

User · Answer

if you want to get the name of the class simply call -  id yourObject   AnotherClass returningObject    NSString  className  yourObject className    NSLog   Class name is       className

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To test if object is an instance of class a    yourObject isKindOfClass  a class      Returns a Boolean value that indicates whether the receiver is an instance of     given class or an instance of any class that inherits from that class    or   yourObject isMemberOfClass  a class      Returns a Boolean value that indicates whether the receiver is an instance of a     given class    To get object s class name you can use NSStringFromClass function   NSString  className   NSStringFromClass  yourObject class      or c-function from objective-c runtime api    import  lt objc runtime h gt              const char  className   class getName  yourObject class    NSLog   yourObject is a   s   className     EDIT  In Swift  if touch view is UIPickerView          touch view is of type UIPickerView

User · Answer

If you want to check for a specific class then you can use  if  MyClass class      myClassObj class       your object is instance of MyClass

[objective-c] How do I test which class an object is in Objective-C?

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