CODEWITHSUNDEEP
iphoneios
hgpl
hgpl

Reputation: 869

To get contents in id

In my project I am having one object of type id. I am setting different values to it. Now I need to check which value it contains and according to that I need to do the operation.

This is my code:

id *currentObject=nil;
-(void)setCurrentObject:(id *)object{
    currentObject=object;
}


- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {


    if ( [elementName isEqualToString:@"apple"]) {
    [self setCurrentObject:apple];
    return;
    }
    else if ( [elementName isEqualToString:@"orange"]) {
    [self setCurrentObject:orange];
        return;
    }   

    [self readString];

}

-(void) readString{

//Here I need to check contents of 'currentObject'. If it contains 'apple' then print 'Its apple' else don't do anything
}

How to check this content of current object which is of type 'id'? Please help.

Upvotes: 0

Views: 71

Answers (3)

janusfidel
janusfidel

Reputation: 8106

you can get the class name of your object by using 

NSStringFromClass

you might want to determine what kind of class your ID object is

id object;
NSDictionary *str = [NSString stringWithString:@"test string"];
object = str;
NSString *string = NSStringFromClass([object class]);
NSLog(@"object is class of : %@", string);

if ([object isKindOfClass:[NSString class]]) {
    NSLog(@"data string = %@",(NSString*)object);
}else if([object isKindOfClass:[NSDictionary class]]){
    NSLog(@"data dictionary = %@", (NSDictionary*)object);
}

Upvotes: 1

Rui Peres
Rui Peres

Reputation: 25917

If you know what kind of object you are going to store ("apple" or "orange"), why don't you just create a NSString instead of id? Don't forget the KISS principle.

Upvotes: 0

Pandey_Laxman
Pandey_Laxman

Reputation: 3908

To get object's class name you can use

const char* className = class_getName([yourObject class]);

Then create a nsstring from above classname using utf8 string then check against what do you want.

Upvotes: 0

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