The auto-generated code overrides paint(), sliderValueChanged, etc. but does not marked with the 'override' keyword.
Compiler: Apple LLVM version 7.0.2 (clang-700.1.81) (Xcode 7.2, but also appeared earlier)
Example Compiler Output:
warning: 'paint' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
Best,
Ben