How to make a forward declaration for a private method?

Question

I put my methods into groups using the #pragma sign in the implementation. But sometimes the code for the implementation of the method appears under the code that calls this method, and I get warnings "Instance method not found". This happens when I use private methods. How to fix it?

Answer 1

The easiest way is to use an anonymous category. Add something like this to the top of your file .mbefore @implementation:

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

Answer 2

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YourClass.m

@interface MyClass()

- (void)myPrivateMethod;

@end


@implementation MyClass

- (void)myPublicMethod
{
    // This will not throw an error or warning
    [self myPrivateMethod];
} 

- (void)myPrivateMethod
{
    // Do something
}

@end

Answer 3

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

@interface YourClassName (private)

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

@end

@implementation YourClassName
...
@end