In Objective-C how do I test the object type

Question

I need to test whether the object is of type NSString or UIImageView  How can I accomplish this  Is there some type of  isoftype  method

User · Accepted Answer

If your object is myObject  and you want to test to see if it is an NSString  the code would be    myObject isKindOfClass  NSString class     Likewise  if you wanted to test myObject for a UIImageView    myObject isKindOfClass  UIImageView class

User · Answer

Running a simple test  I thought I d document what works and what doesn t   Often I see people checking to see if the object s class is a member of the other class or is equal to the other class   For the line below  we have some poorly formed data that can be an NSArray  an NSDictionary or  null      NSArray  hits      myXML objectForKey    Answer   objectForKey    hits   objectForKey    Hit      These are the tests that were performed   NSLog         hits class     if   hits isMemberOfClass  NSMutableArray class          NSLog         hits class       if   hits isMemberOfClass  NSMutableDictionary class          NSLog         hits class       if   hits isMemberOfClass  NSArray class          NSLog         hits class       if   hits isMemberOfClass  NSDictionary class          NSLog         hits class       if   hits isKindOfClass  NSMutableDictionary class          NSLog         hits class       if   hits isKindOfClass  NSDictionary class          NSLog         hits class       if   hits isKindOfClass  NSArray class          NSLog         hits class       if   hits isKindOfClass  NSMutableArray class          NSLog         hits class        isKindOfClass worked rather well while isMemberOfClass didn t

User · Answer

When you want to differ between a superClass and the inheritedClass you can use   if  myTestClass class      myInheritedClass class       NSLog   I m the inheritedClass      if  myTestClass class      mySuperClass class       NSLog   I m the superClass        Using -  BOOL isKindOfClass  Class aClass in this case would result in TRUE both times because the inheritedClass is also a kind of the superClass

User · Answer

Simple   yourobject  class  it will return the class name of yourobject

User · Answer

You can make use of the following code incase you want to check the types of primitive data types      Returns 0 if the object type is equal to double strcmp  myNumber objCType    encode double

User · Answer

You would probably use   -  BOOL isKindOfClass  Class aClass   This is a method of NSObject   For more info check the NSObject documentation   This is how you use this   BOOL test    self isKindOfClass  SomeClass class      You might also try doing somthing like this  for id element in myArray        NSLog                                                  NSLog   Is of type        element className        NSLog   Is of type NSString           element className  isMemberOfClass  NSString class       Yes      No        NSLog   Is a kind of NSString          element classForCoder  isSubclassOfClass  NSString class       Yes      No

[ios] In Objective-C, how do I test the object type?

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