Why is my method not found?

Question

In my h file I have

+(CCRenderTexture*) createStroke: (CCLabelTTF*) label
                            size:(float)size   
                           color:(ccColor3B)cor;

In my m file I implemented this method and use it like

CCRenderTexture* stroke = [self createStroke:pause  size:3  color:ccBLACK];

But it gives me a warning "method not found". Why?

where are you calling that method? In another class method or in an instance method? — Eimantas, May 21 '11 at 11:43
Too lazy to actually explain it, so just as a comment: Remove the + and insert a - instead. Or: Don't use self but instead CCRenderTexture. — JustSid, May 21 '11 at 11:51

score 7 · Accepted Answer · answered May 21 '11 at 11:57

Since the +createStroke is a class method, you can't call it on self. You should instead send that message to the CCRenderTexture class.

So, in your case, if self is of the CCRenderTexture type, you could just replace it with self.class. (So that when you will subclass, the overridden method will be called by the superclass) If it is not, write something like:

CCRenderTexture* stroke = [CCRenderTexture createStroke:pause size:3 color:ccBLACK];

score 2 · Answer 2 · edited May 23 '17 at 12:26

2

plus means it is a class method, so you need to use the Class Name instead of an instance of that class: [ClassName createStroke:pause size:3 color:ccBLACK] You probably want to have an instance method, so put a minus instead of plus in your declaration.

Here is some more info on this topic: What is the difference between class and instance methods?

edited May 23 '17 at 12:26

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answered May 21 '11 at 11:59

Nostradamus

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Why is my method not found?

2 Answers2