Question

I have a method signature here:

.h

-(void)addToArray

And I want to use it here:

.m 

-(void)viewDidLoad{
NSMutableArray *array = [[NSMutableArray alloc]init];
[array addToArray];
}

-(void)addToArray{
//some code here…
}

The problem is that when I do [array addToArray]; it returns to me a message that says “Instance method ‘-addToArray’ not found (return type defaults to ‘id’)”
How can I solve it?

Answer 1

when you do [array somemethod] ..it will look for the method in that array data type class( that is in NSMutableArray class.

when you have a method in your own class.and it is not a category…then you must call

[self somemethod]

this way it will look in the class that is in which you are calling the method.