objective c - I can't figure out the meaning of this statement: -

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+(appdelegate*)instance{return [uiapplication sharedapplication].delegate;

it's in middle of appdelegate using template. if has time, please explain line or usefulness of it.

thank patrick

it utility method:

when in need of instance of application's delegate casted correct class call:

[appdelegate instance]

instead of:

appdelegate* instance = (appdelegate*)[uiapplication sharedapplication].delegate;

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