Defeating the “multiple methods named 'xxx:' found” error

Question

In my current project inside the file ViewController.m, I am running the method:

[[connection writer] writeData: data];

It returns the war

Answer 1

Make sure [connection writer] is actually returning a TCPWriter*. If it is returning an id, then the compiler will not know which writeData to use. Also, make sure you are importing the TCPWriter.h file - if the compiler does not see the header files, it will default to returning id, which will get you back to the same problem.

Try

TCPWriter* writer = [connection writer];
[writer writeData: data];

or

[(TCPWriter*)[connection writer] writeData: data];

Answer 2

As an alternative to the splendid answer above, you can cast the object to the right type to get rid of the warning too, like so:

[(NSView*)textView setAutoresizingMask:(NSViewWidthSizable | NSViewHeightSizable)]; // for horizontal scrolling