Cocoa Dev Central: Learn Objective-C
Cocoa Dev Central: Learn Objective-C Multi-Input Method * in header -(BOOL) writeToFile :(NSString *)path atomically :(BOOL)useAuxiliaryFile; * in use BOOL result = [myData writeToFile :@"/tmp/log.txt" atomically :NO]; * in @selector These are not just named arguments. The method name is actually writeToFile:atomically: in the runtime system.