How to check a class in a NSDictionary

Question

In the below dictionary I want to write a condition for type class, Is there any way to identify the class type alone in the iteraction

NSDictionary *dictionary = [NSDictionary dictionaryWithKeysAndObjects:@"check",@"checkValue",@"webservice", [webservice class], @"list",@"listValue", nil, @"task", [task class], @"new", @"newValue", @"operation",[operation class]];

  for(NSString *aKey in dictionary) {        

        if ([[dictionary valueForKey:aKey]) {
            NSLog(@"Getting In");
        }

    }

Note :I want a single condition to check values [webservice class],[task class],[operation class]

score 9 · Answer 1 · answered Jan 16 '12 at 11:13

9

Look up -isKindOfClass: and -isMemberOfClass:

if([object isKindOfClass:[AObjectClass class])
{
    NSLog(@"object is of type AObjectClass");
}

See the Apple isKindOfClass: documentation.

answered Jan 16 '12 at 11:13

Richard Stelling

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It is used to check a particular class, I just want generic solution to check whether its a class alone – Nakkeeran Jan 16 '12 at 11:17

Totumus Maximus · Answer 2 · 2012-01-16T11:27:57.273

2

- (BOOL)isMemberOfClass:(Class)aClass

this is what u seek probably.

For example, in this code, isMemberOfClass: would return NO:

NSMutableData *myData = [NSMutableData dataWithCapacity:30];
id anArchiver = [[NSArchiver alloc] initForWritingWithMutableData:myData];
if ([anArchiver isMemberOfClass:[NSCoder class]])
    //something...

ref: http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Protocols/NSObject_Protocol/Reference/NSObject.html

Edit:

In NSDictionaries you will have to put Strings for keys. I suggest you convert the class to a string with NSStringFromClass([MyClass class]); and put that as a key.

The way you want to use the class as a key is impossible.

edited Jan 16 '12 at 11:27

answered Jan 16 '12 at 11:12

Totumus Maximus

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It is used to check a particular class, I just want generic solution to check whether its a class alone – Nakkeeran Jan 16 '12 at 11:15
@Nakkeeran: the way you want to use the class as a key is impossible i suggest a work-around using the method in my answer as key. – Totumus Maximus Jan 16 '12 at 11:30

score 1 · Accepted Answer · edited May 23 '17 at 12:19

Found answer for my question in the below link

Check if object is Class type

NSDictionary *dictionary = [NSDictionary dictionaryWithKeysAndObjects:@"check",@"checkValue",@"webservice", [webservice class], @"list",@"listValue", nil, @"task", [task class], @"new", @"newValue", @"operation",[operation class]];

  for(NSString *aKey in dictionary) {        

        if (class_isMetaClass(object_getClass(obj))) {
            NSLog(@"Getting In");
        }

    }

How to check a class in a NSDictionary

3 Answers3