Question

I know it is a common problem, I googled a lot and seems get no luck to solve my problem.
I have a @interface TestViewController:UIViewController
and in its implementation file I have a method defined:

-(void)method1 {
  do something; 
  [self method1];//here I need to call the method itself if a statement is true and this line is where the warning TestViewController may not respond to'method1' I got
}

-(void)method2{
  [self method1] //But there is no problem with this line
}

Can anyone help me?
Thanks in advance!

Answer 1

Your method declarations are missing in the header.
Just add

-(void)method1;
-(void)method2;

to your TestViewController.h file

Update:

The reason why you don’t get a warning about the second call ([self method1] within method2) is, that the compiler already knows about method1 at that point. (because the implementation occurs before method2)