Answer:
iPhone reference library is a set of reference documents for iPhone OS .
It can be downloaded by subscribing to the iPhone OS Library doc set.
Select Help>Documentation from Xcode, and click the subscribe button next to the iPhone OS Library doc set, which appears in the left column.
It can be downloaded by subscribing to the iPhone OS Library doc set.
Select Help>Documentation from Xcode, and click the subscribe button next to the iPhone OS Library doc set, which appears in the left column.
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