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Pretty simple question. I'm working in Objective C (cocos2d) and I'm trying to count the number of a sprites of a certain class are present on the current layer being displayed. For example, I have a class named Seal which is a subclass of of CCNode and in my current layer I want to count how many instances of type Seal are present.

I know how to count the number of children of the layer by doing 

int numberChildren = [[self children] count];

which correctly returns the number of children on the layer. But I just want the number of Seals on my layer. How could I do this? Thanks =)

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2 Answers 2

up vote 2 down vote accepted

Do as ryrich said, however the actual code on Objective-C would be something like this: (Assuming your CCNode class is called "Seal")

int sealCounter = 0;
for (id *node in self.children) {
    if ([node isKindOfClass:[Seal class]]) {
        sealCounter++;
    }
}
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up vote 0 down vote

I come from a C# background, so I can't write you the code (don't want to give you gross, translated Objective-C code :))

But what you could do is loop through the Children ([self children]), check if they can be casted as a Seal. If the casted object is not null, increment a counter. Then just return the counter after the loop is finished.

Hope this helps!

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