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more GRMustacheTemplateDelegate documentation

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1 parent 99ede7b commit 16f24a30abeb039449c014363b2a7468ba18289b @groue committed Mar 5, 2012
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  1. +2 −0 guides/delegate.md
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@@ -38,6 +38,8 @@ Note that those methods do not allow you to build a complete "stack trace" of GR
For instance, a tag like `{{person.name}}` is rendered once. Thus `template:willRenderReturnValueOfInvocation:` will be called once. If the person has been found, the invocation's key will be `@"name"`, and the return value the name of the person. If the person could not be found, the key will be `@"person"`, and the return value `nil`.
+Also: if a section tag `{{#name}}...{{/name}}` is provided with an NSArray, it will be rendered several times. However `template:willRenderReturnValueOfInvocation:` will be called once, with the array stored in the return value of the invocation.
+
### A practical use: debugging templates
You may, for instance, locate keys that could not find any data:

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