How To Call Objective-C Methods From Ruby
To invoke an Objective-C method, you replace each colon in the method name except the last with an underscore. Thus, for example, the NSWindow instance method initWithContentRect:styleMask:backing:defer: becomes initWithContentRect_styleMask_backing_defer.
All Cocoa classes and functions belong to OSX module, so for example, the Objective-C code:
will become:
OSX::NSWindow.alloc.initWithContentRect_styleMask_backing_defer(frame, OSX::NSTitledWindowMask, OSX::NSBackingStoreBuffered, false)As you can see, this decreases the code readability by rendering Objective-C parameter naming useless. So, there is another convenient way to write the method calls — the objc_send method, which accepts Ruby symbols as parameter names. For example, the previous code can also be written as:
Read more about this topic: RubyCocoa
Famous quotes containing the words call, methods and/or ruby:
“Documents create a paper reality we call proof.”
—Mason Cooley (b. 1927)
“With a generous endowment of motherhood provided by legislation, with all laws against voluntary motherhood and education in its methods repealed, with the feminist ideal of education accepted in home and school, and with all special barriers removed in every field of human activity, there is no reason why woman should not become almost a human thing. It will be time enough then to consider whether she has a soul.”
—Crystal Eastman (1881–1928)
“Lay down, lay down the bigly bier,
Lat me the dead look on;
Wi’ cherry cheeks and ruby lips
She lay an’ smil’d on him.
O ae sheave o’ your bread, true-love,
An’ ae glass o’ your wine,
For I hae fasted for your sake
These fully day [is] nine.”
—Anna Gordon Brown (1747–1810)