Creating Custom Document Types
When your application builds new kinds of documents, you should declare them in the Exported UTIs section of the Target > Info editor, which you see in Figure 11-9. This registers support for this file type with the system and identifies you as the owner of that type.
Figure 11-9 Declare custom file types in the Exported UTIs section of the Target > Info editor.
To define the new type, supply a custom UTI (here, com.sadun.cookbookfile), document art (at 64 and 320 sizes), and specify a filename extension that identifies your file type. As with declaring document support, Xcode builds an exported declaration array ...
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