Try using Cocoa from Ruby

Try using Cocoa (macOS API) from Ruby. There used to be something called RubyCocoa. It seems to be stuck now. A close one is a gem package called cocoa.


% gem install cocoa Successfully installed cocoa-0.1.6 Parsing documentation for cocoa-0.1.6 Done installing documentation for cocoa after 3 seconds 1 gem installed

Try running the sample program.


require 'cocoa'
app = Cocoa::NSApplication.sharedApplication
app.setActivationPolicy Cocoa::NSApplicationActivationPolicyRegular
app.activateIgnoringOtherApps true
alert = Cocoa::NSAlert.alloc.init.autorelease
alert.setMessageText "Hello world!"

% ruby test1.rb /usr/local/lib/ruby/gems/2.7.0/gems/cocoa-0.1.6/lib/cocoa/objc/method_def.rb:154: warning: constant ::Fixnum is deprecated /usr/local/lib/ruby/gems/2.7.0/gems/cocoa-0.1.6/lib/cocoa/objc/method_def.rb:154: warning: constant ::Fixnum is deprecated /usr/local/lib/ruby/gems/2.7.0/gems/cocoa-0.1.6/lib/cocoa/objc/method_def.rb:154: warning: constant ::Bignum is deprecated

It runs safely, but don't worry about the warning. Let's fix it next time.

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