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In the previous lesson,

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we looked at different ways that one[br]view controller can present another.

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In this lesson, we're going to learn[br]about the delegate design pattern.

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Many of the most common views in[br]UIKit use this design pattern,

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including text views, pickers,[br]tables, and collections.

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Delegates are used to make important[br]connections between model, view, and

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controller.

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We'll start out by focusing on how[br]the delegate pattern is used with

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text fields.