How to make a forward declaration for private method?

Question

I'm arranging my methods into groups using #pragma mark in implementation. But sometimes, the method implementation code appears below the code that calls this method, and I'm getting "Instance method not found" warnings. It happens when I'm using private methods. How to fix that?

Answer 1

Simplest method is to use a anonymous category. Add something like this to the top of your .m file, before your @implementation:

@interface MyClass()
- (void)myPrivateMethod;
@end

Answer 2

In your Class.m implementation file, you can add an interface section at the beginning and declare private functions in there:

@interface YourClassName (private)

-(void)aPrivateMethod:(NSString*)aParameter;
...

@end

@implementation YourClassName
...
@end